linux_ipc.c revision 219558
1/*- 2 * Copyright (c) 1994-1995 S�ren 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: head/sys/compat/linux/linux_ipc.c 219558 2011-03-12 07:47:05Z dchagin $"); 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 56struct 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 69struct l_shminfo { 70 l_int shmmax; 71 l_int shmmin; 72 l_int shmmni; 73 l_int shmseg; 74 l_int shmall; 75}; 76 77struct 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 86struct 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 97static void 98bsd_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 108static void 109bsd_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 120struct l_ipc_perm { 121 l_key_t key; 122 l_uid16_t uid; 123 l_gid16_t gid; 124 l_uid16_t cuid; 125 l_gid16_t cgid; 126 l_ushort mode; 127 l_ushort seq; 128}; 129 130static void 131linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp) 132{ 133 134 bpp->key = lpp->key; 135 bpp->uid = lpp->uid; 136 bpp->gid = lpp->gid; 137 bpp->cuid = lpp->cuid; 138 bpp->cgid = lpp->cgid; 139 bpp->mode = lpp->mode; 140 bpp->seq = lpp->seq; 141} 142 143 144static void 145bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp) 146{ 147 148 lpp->key = bpp->key; 149 lpp->uid = bpp->uid; 150 lpp->gid = bpp->gid; 151 lpp->cuid = bpp->cuid; 152 lpp->cgid = bpp->cgid; 153 lpp->mode = bpp->mode; 154 lpp->seq = bpp->seq; 155} 156 157struct l_msqid_ds { 158 struct l_ipc_perm msg_perm; 159 l_uintptr_t msg_first; /* first message on queue,unused */ 160 l_uintptr_t msg_last; /* last message in queue,unused */ 161 l_time_t msg_stime; /* last msgsnd time */ 162 l_time_t msg_rtime; /* last msgrcv time */ 163 l_time_t msg_ctime; /* last change time */ 164 l_ulong msg_lcbytes; /* Reuse junk fields for 32 bit */ 165 l_ulong msg_lqbytes; /* ditto */ 166 l_ushort msg_cbytes; /* current number of bytes on queue */ 167 l_ushort msg_qnum; /* number of messages in queue */ 168 l_ushort msg_qbytes; /* max number of bytes on queue */ 169 l_pid_t msg_lspid; /* pid of last msgsnd */ 170 l_pid_t msg_lrpid; /* last receive pid */ 171} 172#if defined(__amd64__) && defined(COMPAT_LINUX32) 173__packed 174#endif 175; 176 177struct l_semid_ds { 178 struct l_ipc_perm sem_perm; 179 l_time_t sem_otime; 180 l_time_t sem_ctime; 181 l_uintptr_t sem_base; 182 l_uintptr_t sem_pending; 183 l_uintptr_t sem_pending_last; 184 l_uintptr_t undo; 185 l_ushort sem_nsems; 186} 187#if defined(__amd64__) && defined(COMPAT_LINUX32) 188__packed 189#endif 190; 191 192struct l_shmid_ds { 193 struct l_ipc_perm shm_perm; 194 l_int shm_segsz; 195 l_time_t shm_atime; 196 l_time_t shm_dtime; 197 l_time_t shm_ctime; 198 l_ushort shm_cpid; 199 l_ushort shm_lpid; 200 l_short shm_nattch; 201 l_ushort private1; 202 l_uintptr_t private2; 203 l_uintptr_t private3; 204}; 205 206static void 207linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp) 208{ 209 210 linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm); 211 bsp->sem_otime = lsp->sem_otime; 212 bsp->sem_ctime = lsp->sem_ctime; 213 bsp->sem_nsems = lsp->sem_nsems; 214 bsp->sem_base = PTRIN(lsp->sem_base); 215} 216 217static void 218bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp) 219{ 220 221 bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm); 222 lsp->sem_otime = bsp->sem_otime; 223 lsp->sem_ctime = bsp->sem_ctime; 224 lsp->sem_nsems = bsp->sem_nsems; 225 lsp->sem_base = PTROUT(bsp->sem_base); 226} 227 228static void 229linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp) 230{ 231 232 linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm); 233 bsp->shm_segsz = lsp->shm_segsz; 234 bsp->shm_lpid = lsp->shm_lpid; 235 bsp->shm_cpid = lsp->shm_cpid; 236 bsp->shm_nattch = lsp->shm_nattch; 237 bsp->shm_atime = lsp->shm_atime; 238 bsp->shm_dtime = lsp->shm_dtime; 239 bsp->shm_ctime = lsp->shm_ctime; 240} 241 242static void 243bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid_ds *lsp) 244{ 245 246 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm); 247 if (bsp->shm_segsz > INT_MAX) 248 lsp->shm_segsz = INT_MAX; 249 else 250 lsp->shm_segsz = bsp->shm_segsz; 251 lsp->shm_lpid = bsp->shm_lpid; 252 lsp->shm_cpid = bsp->shm_cpid; 253 if (bsp->shm_nattch > SHRT_MAX) 254 lsp->shm_nattch = SHRT_MAX; 255 else 256 lsp->shm_nattch = bsp->shm_nattch; 257 lsp->shm_atime = bsp->shm_atime; 258 lsp->shm_dtime = bsp->shm_dtime; 259 lsp->shm_ctime = bsp->shm_ctime; 260 lsp->private3 = 0; 261} 262 263static void 264linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp) 265{ 266 267 linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm); 268 bsp->msg_cbytes = lsp->msg_cbytes; 269 bsp->msg_qnum = lsp->msg_qnum; 270 bsp->msg_qbytes = lsp->msg_qbytes; 271 bsp->msg_lspid = lsp->msg_lspid; 272 bsp->msg_lrpid = lsp->msg_lrpid; 273 bsp->msg_stime = lsp->msg_stime; 274 bsp->msg_rtime = lsp->msg_rtime; 275 bsp->msg_ctime = lsp->msg_ctime; 276} 277 278static void 279bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp) 280{ 281 282 bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm); 283 lsp->msg_cbytes = bsp->msg_cbytes; 284 lsp->msg_qnum = bsp->msg_qnum; 285 lsp->msg_qbytes = bsp->msg_qbytes; 286 lsp->msg_lspid = bsp->msg_lspid; 287 lsp->msg_lrpid = bsp->msg_lrpid; 288 lsp->msg_stime = bsp->msg_stime; 289 lsp->msg_rtime = bsp->msg_rtime; 290 lsp->msg_ctime = bsp->msg_ctime; 291} 292 293static void 294linux_ipc_perm_to_ipc64_perm(struct l_ipc_perm *in, struct l_ipc64_perm *out) 295{ 296 297 /* XXX: do we really need to do something here? */ 298 out->key = in->key; 299 out->uid = in->uid; 300 out->gid = in->gid; 301 out->cuid = in->cuid; 302 out->cgid = in->cgid; 303 out->mode = in->mode; 304 out->seq = in->seq; 305} 306 307static int 308linux_msqid_pullup(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr) 309{ 310 struct l_msqid64_ds linux_msqid64; 311 int error; 312 313 if (ver == LINUX_IPC_64) { 314 error = copyin(uaddr, &linux_msqid64, sizeof(linux_msqid64)); 315 if (error != 0) 316 return (error); 317 318 bzero(linux_msqid, sizeof(*linux_msqid)); 319 320 linux_msqid->msg_perm.uid = linux_msqid64.msg_perm.uid; 321 linux_msqid->msg_perm.gid = linux_msqid64.msg_perm.gid; 322 linux_msqid->msg_perm.mode = linux_msqid64.msg_perm.mode; 323 324 if (linux_msqid64.msg_qbytes > USHRT_MAX) 325 linux_msqid->msg_lqbytes = linux_msqid64.msg_qbytes; 326 else 327 linux_msqid->msg_qbytes = linux_msqid64.msg_qbytes; 328 } else 329 error = copyin(uaddr, linux_msqid, sizeof(*linux_msqid)); 330 331 return (error); 332} 333 334static int 335linux_msqid_pushdown(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr) 336{ 337 struct l_msqid64_ds linux_msqid64; 338 339 if (ver == LINUX_IPC_64) { 340 bzero(&linux_msqid64, sizeof(linux_msqid64)); 341 342 linux_ipc_perm_to_ipc64_perm(&linux_msqid->msg_perm, 343 &linux_msqid64.msg_perm); 344 345 linux_msqid64.msg_stime = linux_msqid->msg_stime; 346 linux_msqid64.msg_rtime = linux_msqid->msg_rtime; 347 linux_msqid64.msg_ctime = linux_msqid->msg_ctime; 348 349 if (linux_msqid->msg_cbytes == 0) 350 linux_msqid64.msg_cbytes = linux_msqid->msg_lcbytes; 351 else 352 linux_msqid64.msg_cbytes = linux_msqid->msg_cbytes; 353 354 linux_msqid64.msg_qnum = linux_msqid->msg_qnum; 355 356 if (linux_msqid->msg_qbytes == 0) 357 linux_msqid64.msg_qbytes = linux_msqid->msg_lqbytes; 358 else 359 linux_msqid64.msg_qbytes = linux_msqid->msg_qbytes; 360 361 linux_msqid64.msg_lspid = linux_msqid->msg_lspid; 362 linux_msqid64.msg_lrpid = linux_msqid->msg_lrpid; 363 364 return (copyout(&linux_msqid64, uaddr, sizeof(linux_msqid64))); 365 } else 366 return (copyout(linux_msqid, uaddr, sizeof(*linux_msqid))); 367} 368 369static int 370linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr) 371{ 372 struct l_semid64_ds linux_semid64; 373 int error; 374 375 if (ver == LINUX_IPC_64) { 376 error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64)); 377 if (error != 0) 378 return (error); 379 380 bzero(linux_semid, sizeof(*linux_semid)); 381 382 linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid; 383 linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid; 384 linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode; 385 } else 386 error = copyin(uaddr, linux_semid, sizeof(*linux_semid)); 387 388 return (error); 389} 390 391static int 392linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr) 393{ 394 struct l_semid64_ds linux_semid64; 395 396 if (ver == LINUX_IPC_64) { 397 bzero(&linux_semid64, sizeof(linux_semid64)); 398 399 linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm, 400 &linux_semid64.sem_perm); 401 402 linux_semid64.sem_otime = linux_semid->sem_otime; 403 linux_semid64.sem_ctime = linux_semid->sem_ctime; 404 linux_semid64.sem_nsems = linux_semid->sem_nsems; 405 406 return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64))); 407 } else 408 return (copyout(linux_semid, uaddr, sizeof(*linux_semid))); 409} 410 411static int 412linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr) 413{ 414 struct l_shmid64_ds linux_shmid64; 415 int error; 416 417 if (ver == LINUX_IPC_64) { 418 error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64)); 419 if (error != 0) 420 return (error); 421 422 bzero(linux_shmid, sizeof(*linux_shmid)); 423 424 linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid; 425 linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid; 426 linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode; 427 } else 428 error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid)); 429 430 return (error); 431} 432 433static int 434linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr) 435{ 436 struct l_shmid64_ds linux_shmid64; 437 438 /* 439 * XXX: This is backwards and loses information in shm_nattch 440 * and shm_segsz. We should probably either expose the BSD 441 * shmid structure directly and convert it to either the 442 * non-64 or 64 variant directly or the code should always 443 * convert to the 64 variant and then truncate values into the 444 * non-64 variant if needed since the 64 variant has more 445 * precision. 446 */ 447 if (ver == LINUX_IPC_64) { 448 bzero(&linux_shmid64, sizeof(linux_shmid64)); 449 450 linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm, 451 &linux_shmid64.shm_perm); 452 453 linux_shmid64.shm_segsz = linux_shmid->shm_segsz; 454 linux_shmid64.shm_atime = linux_shmid->shm_atime; 455 linux_shmid64.shm_dtime = linux_shmid->shm_dtime; 456 linux_shmid64.shm_ctime = linux_shmid->shm_ctime; 457 linux_shmid64.shm_cpid = linux_shmid->shm_cpid; 458 linux_shmid64.shm_lpid = linux_shmid->shm_lpid; 459 linux_shmid64.shm_nattch = linux_shmid->shm_nattch; 460 461 return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64))); 462 } else 463 return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid))); 464} 465 466static int 467linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo, 468 caddr_t uaddr) 469{ 470 struct l_shminfo64 linux_shminfo64; 471 472 if (ver == LINUX_IPC_64) { 473 bzero(&linux_shminfo64, sizeof(linux_shminfo64)); 474 475 linux_shminfo64.shmmax = linux_shminfo->shmmax; 476 linux_shminfo64.shmmin = linux_shminfo->shmmin; 477 linux_shminfo64.shmmni = linux_shminfo->shmmni; 478 linux_shminfo64.shmseg = linux_shminfo->shmseg; 479 linux_shminfo64.shmall = linux_shminfo->shmall; 480 481 return (copyout(&linux_shminfo64, uaddr, 482 sizeof(linux_shminfo64))); 483 } else 484 return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo))); 485} 486 487int 488linux_semop(struct thread *td, struct linux_semop_args *args) 489{ 490 struct semop_args /* { 491 int semid; 492 struct sembuf *sops; 493 int nsops; 494 } */ bsd_args; 495 496 bsd_args.semid = args->semid; 497 bsd_args.sops = PTRIN(args->tsops); 498 bsd_args.nsops = args->nsops; 499 return (semop(td, &bsd_args)); 500} 501 502int 503linux_semget(struct thread *td, struct linux_semget_args *args) 504{ 505 struct semget_args /* { 506 key_t key; 507 int nsems; 508 int semflg; 509 } */ bsd_args; 510 511 if (args->nsems < 0) 512 return (EINVAL); 513 bsd_args.key = args->key; 514 bsd_args.nsems = args->nsems; 515 bsd_args.semflg = args->semflg; 516 return (semget(td, &bsd_args)); 517} 518 519int 520linux_semctl(struct thread *td, struct linux_semctl_args *args) 521{ 522 struct l_semid_ds linux_semid; 523 struct l_seminfo linux_seminfo; 524 struct semid_ds semid; 525 union semun semun; 526 register_t rval; 527 int cmd, error; 528 529 switch (args->cmd & ~LINUX_IPC_64) { 530 case LINUX_IPC_RMID: 531 cmd = IPC_RMID; 532 break; 533 case LINUX_GETNCNT: 534 cmd = GETNCNT; 535 break; 536 case LINUX_GETPID: 537 cmd = GETPID; 538 break; 539 case LINUX_GETVAL: 540 cmd = GETVAL; 541 break; 542 case LINUX_GETZCNT: 543 cmd = GETZCNT; 544 break; 545 case LINUX_SETVAL: 546 cmd = SETVAL; 547 semun.val = args->arg.val; 548 break; 549 case LINUX_IPC_SET: 550 cmd = IPC_SET; 551 error = linux_semid_pullup(args->cmd & LINUX_IPC_64, 552 &linux_semid, PTRIN(args->arg.buf)); 553 if (error) 554 return (error); 555 linux_to_bsd_semid_ds(&linux_semid, &semid); 556 semun.buf = &semid; 557 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun, 558 td->td_retval)); 559 case LINUX_IPC_STAT: 560 case LINUX_SEM_STAT: 561 if ((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT) 562 cmd = IPC_STAT; 563 else 564 cmd = SEM_STAT; 565 semun.buf = &semid; 566 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun, 567 &rval); 568 if (error) 569 return (error); 570 bsd_to_linux_semid_ds(&semid, &linux_semid); 571 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64, 572 &linux_semid, PTRIN(args->arg.buf)); 573 if (error == 0) 574 td->td_retval[0] = (cmd == SEM_STAT) ? rval : 0; 575 return (error); 576 case LINUX_IPC_INFO: 577 case LINUX_SEM_INFO: 578 bcopy(&seminfo, &linux_seminfo, sizeof(linux_seminfo) ); 579/* XXX BSD equivalent? 580#define used_semids 10 581#define used_sems 10 582 linux_seminfo.semusz = used_semids; 583 linux_seminfo.semaem = used_sems; 584*/ 585 error = copyout(&linux_seminfo, 586 PTRIN(args->arg.buf), sizeof(linux_seminfo)); 587 if (error) 588 return (error); 589 td->td_retval[0] = seminfo.semmni; 590 return (0); /* No need for __semctl call */ 591 case LINUX_GETALL: 592 cmd = GETALL; 593 semun.val = args->arg.val; 594 break; 595 case LINUX_SETALL: 596 cmd = SETALL; 597 semun.val = args->arg.val; 598 break; 599 default: 600 linux_msg(td, "ipc type %d is not implemented", 601 args->cmd & ~LINUX_IPC_64); 602 return (EINVAL); 603 } 604 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun, 605 td->td_retval)); 606} 607 608int 609linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args) 610{ 611 const void *msgp; 612 long mtype; 613 l_long lmtype; 614 int error; 615 616 if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax) 617 return (EINVAL); 618 msgp = PTRIN(args->msgp); 619 if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0) 620 return (error); 621 mtype = (long)lmtype; 622 return (kern_msgsnd(td, args->msqid, 623 (const char *)msgp + sizeof(lmtype), 624 args->msgsz, args->msgflg, mtype)); 625} 626 627int 628linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args) 629{ 630 void *msgp; 631 long mtype; 632 l_long lmtype; 633 int error; 634 635 if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax) 636 return (EINVAL); 637 msgp = PTRIN(args->msgp); 638 if ((error = kern_msgrcv(td, args->msqid, 639 (char *)msgp + sizeof(lmtype), args->msgsz, 640 args->msgtyp, args->msgflg, &mtype)) != 0) 641 return (error); 642 lmtype = (l_long)mtype; 643 return (copyout(&lmtype, msgp, sizeof(lmtype))); 644} 645 646int 647linux_msgget(struct thread *td, struct linux_msgget_args *args) 648{ 649 struct msgget_args /* { 650 key_t key; 651 int msgflg; 652 } */ bsd_args; 653 654 bsd_args.key = args->key; 655 bsd_args.msgflg = args->msgflg; 656 return (msgget(td, &bsd_args)); 657} 658 659int 660linux_msgctl(struct thread *td, struct linux_msgctl_args *args) 661{ 662 int error, bsd_cmd; 663 struct l_msqid_ds linux_msqid; 664 struct msqid_ds bsd_msqid; 665 666 bsd_cmd = args->cmd & ~LINUX_IPC_64; 667 switch (bsd_cmd) { 668 case LINUX_IPC_INFO: 669 case LINUX_MSG_INFO: { 670 struct l_msginfo linux_msginfo; 671 672 /* 673 * XXX MSG_INFO uses the same data structure but returns different 674 * dynamic counters in msgpool, msgmap, and msgtql fields. 675 */ 676 linux_msginfo.msgpool = (long)msginfo.msgmni * 677 (long)msginfo.msgmnb / 1024L; /* XXX MSG_INFO. */ 678 linux_msginfo.msgmap = msginfo.msgmnb; /* XXX MSG_INFO. */ 679 linux_msginfo.msgmax = msginfo.msgmax; 680 linux_msginfo.msgmnb = msginfo.msgmnb; 681 linux_msginfo.msgmni = msginfo.msgmni; 682 linux_msginfo.msgssz = msginfo.msgssz; 683 linux_msginfo.msgtql = msginfo.msgtql; /* XXX MSG_INFO. */ 684 linux_msginfo.msgseg = msginfo.msgseg; 685 error = copyout(&linux_msginfo, PTRIN(args->buf), 686 sizeof(linux_msginfo)); 687 if (error == 0) 688 td->td_retval[0] = msginfo.msgmni; /* XXX */ 689 690 return (error); 691 } 692 693 /* 694 * TODO: implement this 695 * case LINUX_MSG_STAT: 696 */ 697 case LINUX_IPC_STAT: 698 /* NOTHING */ 699 break; 700 701 case LINUX_IPC_SET: 702 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64, 703 &linux_msqid, PTRIN(args->buf)); 704 if (error) 705 return (error); 706 linux_to_bsd_msqid_ds(&linux_msqid, &bsd_msqid); 707 break; 708 709 case LINUX_IPC_RMID: 710 /* NOTHING */ 711 break; 712 713 default: 714 return (EINVAL); 715 break; 716 } 717 718 error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid); 719 if (error != 0) 720 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL) 721 return (error); 722 723 if (bsd_cmd == LINUX_IPC_STAT) { 724 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid); 725 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64, 726 &linux_msqid, PTRIN(args->buf))); 727 } 728 729 return (0); 730} 731 732int 733linux_shmat(struct thread *td, struct linux_shmat_args *args) 734{ 735 struct shmat_args /* { 736 int shmid; 737 void *shmaddr; 738 int shmflg; 739 } */ bsd_args; 740 int error; 741#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 742 l_uintptr_t addr; 743#endif 744 745 bsd_args.shmid = args->shmid; 746 bsd_args.shmaddr = PTRIN(args->shmaddr); 747 bsd_args.shmflg = args->shmflg; 748 if ((error = shmat(td, &bsd_args))) 749 return (error); 750#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 751 addr = td->td_retval[0]; 752 if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr)))) 753 return (error); 754 td->td_retval[0] = 0; 755#endif 756 return (0); 757} 758 759int 760linux_shmdt(struct thread *td, struct linux_shmdt_args *args) 761{ 762 struct shmdt_args /* { 763 void *shmaddr; 764 } */ bsd_args; 765 766 bsd_args.shmaddr = PTRIN(args->shmaddr); 767 return (shmdt(td, &bsd_args)); 768} 769 770int 771linux_shmget(struct thread *td, struct linux_shmget_args *args) 772{ 773 struct shmget_args /* { 774 key_t key; 775 int size; 776 int shmflg; 777 } */ bsd_args; 778 779 bsd_args.key = args->key; 780 bsd_args.size = args->size; 781 bsd_args.shmflg = args->shmflg; 782 return (shmget(td, &bsd_args)); 783} 784 785int 786linux_shmctl(struct thread *td, struct linux_shmctl_args *args) 787{ 788 struct l_shmid_ds linux_shmid; 789 struct l_shminfo linux_shminfo; 790 struct l_shm_info linux_shm_info; 791 struct shmid_ds bsd_shmid; 792 int error; 793 794 switch (args->cmd & ~LINUX_IPC_64) { 795 796 case LINUX_IPC_INFO: { 797 struct shminfo bsd_shminfo; 798 799 /* Perform shmctl wanting removed segments lookup */ 800 error = kern_shmctl(td, args->shmid, IPC_INFO, 801 (void *)&bsd_shminfo, NULL); 802 if (error) 803 return (error); 804 805 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo); 806 807 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64, 808 &linux_shminfo, PTRIN(args->buf))); 809 } 810 811 case LINUX_SHM_INFO: { 812 struct shm_info bsd_shm_info; 813 814 /* Perform shmctl wanting removed segments lookup */ 815 error = kern_shmctl(td, args->shmid, SHM_INFO, 816 (void *)&bsd_shm_info, NULL); 817 if (error) 818 return (error); 819 820 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info); 821 822 return (copyout(&linux_shm_info, PTRIN(args->buf), 823 sizeof(struct l_shm_info))); 824 } 825 826 case LINUX_IPC_STAT: 827 /* Perform shmctl wanting removed segments lookup */ 828 error = kern_shmctl(td, args->shmid, IPC_STAT, 829 (void *)&bsd_shmid, NULL); 830 if (error) 831 return (error); 832 833 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid); 834 835 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64, 836 &linux_shmid, PTRIN(args->buf))); 837 838 case LINUX_SHM_STAT: 839 /* Perform shmctl wanting removed segments lookup */ 840 error = kern_shmctl(td, args->shmid, IPC_STAT, 841 (void *)&bsd_shmid, NULL); 842 if (error) 843 return (error); 844 845 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid); 846 847 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64, 848 &linux_shmid, PTRIN(args->buf))); 849 850 case LINUX_IPC_SET: 851 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64, 852 &linux_shmid, PTRIN(args->buf)); 853 if (error) 854 return (error); 855 856 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid); 857 858 /* Perform shmctl wanting removed segments lookup */ 859 return (kern_shmctl(td, args->shmid, IPC_SET, 860 (void *)&bsd_shmid, NULL)); 861 862 case LINUX_IPC_RMID: { 863 void *buf; 864 865 if (args->buf == 0) 866 buf = NULL; 867 else { 868 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64, 869 &linux_shmid, PTRIN(args->buf)); 870 if (error) 871 return (error); 872 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid); 873 buf = (void *)&bsd_shmid; 874 } 875 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL)); 876 } 877 878 case LINUX_SHM_LOCK: 879 /* FALLTHROUGH */ 880 case LINUX_SHM_UNLOCK: 881 /* FALLTHROUGH */ 882 default: 883 linux_msg(td, "ipc type %d not implemented", 884 args->cmd & ~LINUX_IPC_64); 885 return (EINVAL); 886 } 887} 888 889MODULE_DEPEND(linux, sysvmsg, 1, 1, 1); 890MODULE_DEPEND(linux, sysvsem, 1, 1, 1); 891MODULE_DEPEND(linux, sysvshm, 1, 1, 1); 892