linux_ipc.c revision 1.54.4.1
1 /* $NetBSD: linux_ipc.c,v 1.54.4.1 2011/05/31 03:04:30 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: linux_ipc.c,v 1.54.4.1 2011/05/31 03:04:30 rmind Exp $"); 34 35 #if defined(_KERNEL_OPT) 36 #include "opt_sysv.h" 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/shm.h> 41 #include <sys/sem.h> 42 #include <sys/msg.h> 43 #include <sys/proc.h> 44 #include <sys/systm.h> 45 #include <sys/vnode.h> 46 47 #include <sys/mount.h> 48 #include <sys/syscallargs.h> 49 50 #include <compat/linux/common/linux_types.h> 51 #include <compat/linux/common/linux_signal.h> 52 #include <compat/linux/common/linux_util.h> 53 #include <compat/linux/common/linux_ipc.h> 54 #include <compat/linux/common/linux_msg.h> 55 #include <compat/linux/common/linux_shm.h> 56 #include <compat/linux/common/linux_sem.h> 57 58 #include <compat/linux/linux_syscallargs.h> 59 #include <compat/linux/linux_syscall.h> 60 61 #include <compat/linux/common/linux_ipccall.h> 62 #include <compat/linux/common/linux_machdep.h> 63 64 /* 65 * Note: Not all linux architechtures have explicit versions 66 * of the SYSV* syscalls. On the ones that don't 67 * we pretend that they are defined anyway. *_args and 68 * prototypes are defined in individual headers; 69 * syscalls.master lists those syscalls as NOARGS. 70 * 71 * The functions in multiarch are the ones that just need 72 * the arguments shuffled around and then use the 73 * normal NetBSD syscall. 74 * 75 * Function in multiarch: 76 * linux_sys_ipc : linux_ipccall.c 77 * linux_semop : linux_ipccall.c 78 * linux_semget : linux_ipccall.c 79 * linux_msgsnd : linux_ipccall.c 80 * linux_msgrcv : linux_ipccall.c 81 * linux_msgget : linux_ipccall.c 82 * linux_shmdt : linux_ipccall.c 83 * linux_shmget : linux_ipccall.c 84 */ 85 86 #if defined (SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) 87 /* 88 * Convert between Linux and NetBSD ipc_perm structures. Only the 89 * order of the fields is different. 90 */ 91 void 92 linux_to_bsd_ipc_perm(struct linux_ipc_perm *lpp, struct ipc_perm *bpp) 93 { 94 95 bpp->_key = lpp->l_key; 96 bpp->uid = lpp->l_uid; 97 bpp->gid = lpp->l_gid; 98 bpp->cuid = lpp->l_cuid; 99 bpp->cgid = lpp->l_cgid; 100 bpp->mode = lpp->l_mode; 101 bpp->_seq = lpp->l_seq; 102 } 103 104 void 105 linux_to_bsd_ipc64_perm(struct linux_ipc64_perm *lpp, struct ipc_perm *bpp) 106 { 107 bpp->_key = lpp->l_key; 108 bpp->uid = lpp->l_uid; 109 bpp->gid = lpp->l_gid; 110 bpp->cuid = lpp->l_cuid; 111 bpp->cgid = lpp->l_cgid; 112 bpp->mode = lpp->l_mode; 113 bpp->_seq = lpp->l_seq; 114 } 115 116 void 117 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct linux_ipc_perm *lpp) 118 { 119 120 lpp->l_key = bpp->_key; 121 lpp->l_uid = bpp->uid; 122 lpp->l_gid = bpp->gid; 123 lpp->l_cuid = bpp->cuid; 124 lpp->l_cgid = bpp->cgid; 125 lpp->l_mode = bpp->mode; 126 lpp->l_seq = bpp->_seq; 127 } 128 129 void 130 bsd_to_linux_ipc64_perm(struct ipc_perm *bpp, struct linux_ipc64_perm *lpp) 131 { 132 lpp->l_key = bpp->_key; 133 lpp->l_uid = bpp->uid; 134 lpp->l_gid = bpp->gid; 135 lpp->l_cuid = bpp->cuid; 136 lpp->l_cgid = bpp->cgid; 137 lpp->l_mode = bpp->mode; 138 lpp->l_seq = bpp->_seq; 139 } 140 141 #endif 142 143 #ifdef SYSVSEM 144 /* 145 * Semaphore operations. Most constants and structures are the same on 146 * both systems. Only semctl() needs some extra work. 147 */ 148 149 /* 150 * Convert between Linux and NetBSD semid_ds structures. 151 */ 152 void 153 bsd_to_linux_semid_ds(struct semid_ds *bs, struct linux_semid_ds *ls) 154 { 155 bsd_to_linux_ipc_perm(&bs->sem_perm, &ls->l_sem_perm); 156 ls->l_sem_otime = bs->sem_otime; 157 ls->l_sem_ctime = bs->sem_ctime; 158 ls->l_sem_nsems = bs->sem_nsems; 159 ls->l_sem_base = bs->_sem_base; 160 } 161 162 void 163 bsd_to_linux_semid64_ds(struct semid_ds *bs, struct linux_semid64_ds *ls) 164 { 165 bsd_to_linux_ipc64_perm(&bs->sem_perm, &ls->l_sem_perm); 166 ls->l_sem_otime = bs->sem_otime; 167 ls->l_sem_ctime = bs->sem_ctime; 168 ls->l_sem_nsems = bs->sem_nsems; 169 } 170 171 void 172 linux_to_bsd_semid_ds(struct linux_semid_ds *ls, struct semid_ds *bs) 173 { 174 linux_to_bsd_ipc_perm(&ls->l_sem_perm, &bs->sem_perm); 175 bs->sem_otime = ls->l_sem_otime; 176 bs->sem_ctime = ls->l_sem_ctime; 177 bs->sem_nsems = ls->l_sem_nsems; 178 bs->_sem_base = ls->l_sem_base; 179 } 180 181 void 182 linux_to_bsd_semid64_ds(struct linux_semid64_ds *ls, struct semid_ds *bs) 183 { 184 linux_to_bsd_ipc64_perm(&ls->l_sem_perm, &bs->sem_perm); 185 bs->sem_otime = ls->l_sem_otime; 186 bs->sem_ctime = ls->l_sem_ctime; 187 bs->sem_nsems = ls->l_sem_nsems; 188 } 189 190 /* 191 * Most of this can be handled by directly passing the arguments on; we 192 * just need to frob the `cmd' and convert the semid_ds and semun. 193 */ 194 int 195 linux_sys_semctl(struct lwp *l, const struct linux_sys_semctl_args *uap, register_t *retval) 196 { 197 /* { 198 syscallarg(int) semid; 199 syscallarg(int) semnum; 200 syscallarg(int) cmd; 201 syscallarg(union linux_semun) arg; 202 } */ 203 struct semid_ds sembuf; 204 struct linux_semid_ds lsembuf; 205 struct linux_semid64_ds lsembuf64; 206 union __semun semun; 207 int cmd, lcmd, error; 208 void *pass_arg = NULL; 209 210 lcmd = SCARG(uap, cmd); 211 #ifdef LINUX_IPC_FORCE64 212 lcmd |= LINUX_IPC_64; 213 #endif 214 215 switch (lcmd & ~LINUX_IPC_64) { 216 case LINUX_IPC_SET: 217 if (lcmd & LINUX_IPC_64) { 218 error = copyin(SCARG(uap, arg).l_buf, &lsembuf64, 219 sizeof(lsembuf64)); 220 linux_to_bsd_semid64_ds(&lsembuf64, &sembuf); 221 } else { 222 error = copyin(SCARG(uap, arg).l_buf, &lsembuf, 223 sizeof(lsembuf)); 224 linux_to_bsd_semid_ds(&lsembuf, &sembuf); 225 } 226 if (error) 227 return (error); 228 pass_arg = &sembuf; 229 cmd = IPC_SET; 230 break; 231 232 case LINUX_IPC_STAT: 233 pass_arg = &sembuf; 234 cmd = IPC_STAT; 235 break; 236 237 case LINUX_IPC_RMID: 238 cmd = IPC_RMID; 239 break; 240 241 case LINUX_GETVAL: 242 cmd = GETVAL; 243 break; 244 245 case LINUX_GETPID: 246 cmd = GETPID; 247 break; 248 249 case LINUX_GETNCNT: 250 cmd = GETNCNT; 251 break; 252 253 case LINUX_GETZCNT: 254 cmd = GETZCNT; 255 break; 256 257 case LINUX_GETALL: 258 pass_arg = &semun; 259 semun.array = SCARG(uap, arg).l_array; 260 cmd = GETALL; 261 break; 262 263 case LINUX_SETVAL: 264 pass_arg = &semun; 265 semun.val = SCARG(uap, arg).l_val; 266 cmd = SETVAL; 267 break; 268 269 case LINUX_SETALL: 270 pass_arg = &semun; 271 semun.array = SCARG(uap, arg).l_array; 272 cmd = SETALL; 273 break; 274 275 default: 276 return (EINVAL); 277 } 278 279 error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd, 280 pass_arg, retval); 281 if (error) 282 return error; 283 284 switch (lcmd) { 285 case LINUX_IPC_STAT: 286 bsd_to_linux_semid_ds(&sembuf, &lsembuf); 287 error = copyout(&lsembuf, SCARG(uap, arg).l_buf, 288 sizeof(lsembuf)); 289 break; 290 case LINUX_IPC_STAT | LINUX_IPC_64: 291 bsd_to_linux_semid64_ds(&sembuf, &lsembuf64); 292 error = copyout(&lsembuf64, SCARG(uap, arg).l_buf, 293 sizeof(lsembuf64)); 294 break; 295 default: 296 break; 297 } 298 299 return (error); 300 } 301 #endif /* SYSVSEM */ 302 303 #ifdef SYSVMSG 304 305 void 306 linux_to_bsd_msqid_ds(struct linux_msqid_ds *lmp, struct msqid_ds *bmp) 307 { 308 309 memset(bmp, 0, sizeof(*bmp)); 310 linux_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm); 311 bmp->_msg_first = lmp->l_msg_first; 312 bmp->_msg_last = lmp->l_msg_last; 313 bmp->_msg_cbytes = lmp->l_msg_cbytes; 314 bmp->msg_qnum = lmp->l_msg_qnum; 315 bmp->msg_qbytes = lmp->l_msg_qbytes; 316 bmp->msg_lspid = lmp->l_msg_lspid; 317 bmp->msg_lrpid = lmp->l_msg_lrpid; 318 bmp->msg_stime = lmp->l_msg_stime; 319 bmp->msg_rtime = lmp->l_msg_rtime; 320 bmp->msg_ctime = lmp->l_msg_ctime; 321 } 322 323 void 324 linux_to_bsd_msqid64_ds(struct linux_msqid64_ds *lmp, struct msqid_ds *bmp) 325 { 326 327 memset(bmp, 0, sizeof(*bmp)); 328 linux_to_bsd_ipc64_perm(&lmp->l_msg_perm, &bmp->msg_perm); 329 bmp->msg_stime = lmp->l_msg_stime; 330 bmp->msg_rtime = lmp->l_msg_rtime; 331 bmp->msg_ctime = lmp->l_msg_ctime; 332 bmp->_msg_cbytes = lmp->l_msg_cbytes; 333 bmp->msg_qnum = lmp->l_msg_qnum; 334 bmp->msg_qbytes = lmp->l_msg_qbytes; 335 bmp->msg_lspid = lmp->l_msg_lspid; 336 bmp->msg_lrpid = lmp->l_msg_lrpid; 337 } 338 339 void 340 bsd_to_linux_msqid_ds(struct msqid_ds *bmp, struct linux_msqid_ds *lmp) 341 { 342 343 memset(lmp, 0, sizeof(*lmp)); 344 bsd_to_linux_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm); 345 lmp->l_msg_first = bmp->_msg_first; 346 lmp->l_msg_last = bmp->_msg_last; 347 lmp->l_msg_cbytes = bmp->_msg_cbytes; 348 lmp->l_msg_qnum = bmp->msg_qnum; 349 lmp->l_msg_qbytes = bmp->msg_qbytes; 350 lmp->l_msg_lspid = bmp->msg_lspid; 351 lmp->l_msg_lrpid = bmp->msg_lrpid; 352 lmp->l_msg_stime = bmp->msg_stime; 353 lmp->l_msg_rtime = bmp->msg_rtime; 354 lmp->l_msg_ctime = bmp->msg_ctime; 355 } 356 357 void 358 bsd_to_linux_msqid64_ds(struct msqid_ds *bmp, struct linux_msqid64_ds *lmp) 359 { 360 361 memset(lmp, 0, sizeof(*lmp)); 362 bsd_to_linux_ipc64_perm(&bmp->msg_perm, &lmp->l_msg_perm); 363 lmp->l_msg_stime = bmp->msg_stime; 364 lmp->l_msg_rtime = bmp->msg_rtime; 365 lmp->l_msg_ctime = bmp->msg_ctime; 366 lmp->l_msg_cbytes = bmp->_msg_cbytes; 367 lmp->l_msg_qnum = bmp->msg_qnum; 368 lmp->l_msg_qbytes = bmp->msg_qbytes; 369 lmp->l_msg_lspid = bmp->msg_lspid; 370 lmp->l_msg_lrpid = bmp->msg_lrpid; 371 } 372 373 int 374 linux_sys_msgctl(struct lwp *l, const struct linux_sys_msgctl_args *uap, register_t *retval) 375 { 376 /* { 377 syscallarg(int) msqid; 378 syscallarg(int) cmd; 379 syscallarg(struct linux_msqid_ds *) buf; 380 } */ 381 struct msqid_ds bm, *bmp = NULL; 382 struct linux_msqid_ds lm; 383 struct linux_msqid64_ds lm64; 384 int cmd, lcmd, error; 385 386 lcmd = SCARG(uap, cmd); 387 #ifdef LINUX_IPC_FORCE64 388 lcmd |= LINUX_IPC_64; 389 #endif 390 391 switch (lcmd & ~LINUX_IPC_64) { 392 case LINUX_IPC_STAT: 393 cmd = IPC_STAT; 394 bmp = &bm; 395 break; 396 case LINUX_IPC_SET: 397 if (lcmd & LINUX_IPC_64) { 398 error = copyin(SCARG(uap, buf), &lm64, sizeof lm64); 399 linux_to_bsd_msqid64_ds(&lm64, &bm); 400 } else { 401 error = copyin(SCARG(uap, buf), &lm, sizeof lm); 402 linux_to_bsd_msqid_ds(&lm, &bm); 403 } 404 if (error) 405 return error; 406 cmd = IPC_SET; 407 bmp = &bm; 408 break; 409 case LINUX_IPC_RMID: 410 cmd = IPC_RMID; 411 break; 412 default: 413 return EINVAL; 414 } 415 416 if ((error = msgctl1(l, SCARG(uap, msqid), cmd, bmp))) 417 return error; 418 419 switch (lcmd) { 420 case LINUX_IPC_STAT: 421 bsd_to_linux_msqid_ds(&bm, &lm); 422 error = copyout(&lm, SCARG(uap, buf), sizeof lm); 423 break; 424 case LINUX_IPC_STAT|LINUX_IPC_64: 425 bsd_to_linux_msqid64_ds(&bm, &lm64); 426 error = copyout(&lm64, SCARG(uap, buf), sizeof lm64); 427 break; 428 default: 429 break; 430 } 431 432 return error; 433 } 434 #endif /* SYSVMSG */ 435 436 #ifdef SYSVSHM 437 /* 438 * shmget(2). Just make sure the Linux-compatible shmat() semantics 439 * is enabled for the segment, so that shmat() succeeds even when 440 * the segment would be removed. 441 */ 442 int 443 linux_sys_shmget(struct lwp *l, const struct linux_sys_shmget_args *uap, register_t *retval) 444 { 445 /* { 446 syscallarg(key_t) key; 447 syscallarg(size_t) size; 448 syscallarg(int) shmflg; 449 } */ 450 struct sys_shmget_args bsd_ua; 451 452 SCARG(&bsd_ua, key) = SCARG(uap, key); 453 SCARG(&bsd_ua, size) = SCARG(uap, size); 454 SCARG(&bsd_ua, shmflg) = SCARG(uap, shmflg) | _SHM_RMLINGER; 455 456 return sys_shmget(l, &bsd_ua, retval); 457 } 458 459 /* 460 * shmat(2). Very straightforward, except that Linux passes a pointer 461 * in which the return value is to be passed. This is subsequently 462 * handled by libc, apparently. 463 */ 464 #ifndef __amd64__ 465 int 466 linux_sys_shmat(struct lwp *l, const struct linux_sys_shmat_args *uap, register_t *retval) 467 { 468 /* { 469 syscallarg(int) shmid; 470 syscallarg(void *) shmaddr; 471 syscallarg(int) shmflg; 472 syscallarg(u_long *) raddr; 473 } */ 474 int error; 475 476 if ((error = sys_shmat(l, (const void *)uap, retval))) 477 return error; 478 479 if ((error = copyout(&retval[0], SCARG(uap, raddr), sizeof retval[0]))) 480 return error; 481 482 retval[0] = 0; 483 return 0; 484 } 485 #endif /* __amd64__ */ 486 487 /* 488 * Convert between Linux and NetBSD shmid_ds structures. 489 * The order of the fields is once again the difference, and 490 * we also need a place to store the internal data pointer 491 * in, which is unfortunately stored in this structure. 492 * 493 * We abuse a Linux internal field for that. 494 */ 495 void 496 linux_to_bsd_shmid_ds(struct linux_shmid_ds *lsp, struct shmid_ds *bsp) 497 { 498 499 linux_to_bsd_ipc_perm(&lsp->l_shm_perm, &bsp->shm_perm); 500 bsp->shm_segsz = lsp->l_shm_segsz; 501 bsp->shm_lpid = lsp->l_shm_lpid; 502 bsp->shm_cpid = lsp->l_shm_cpid; 503 bsp->shm_nattch = lsp->l_shm_nattch; 504 bsp->shm_atime = lsp->l_shm_atime; 505 bsp->shm_dtime = lsp->l_shm_dtime; 506 bsp->shm_ctime = lsp->l_shm_ctime; 507 bsp->_shm_internal = lsp->l_private2; /* XXX Oh well. */ 508 } 509 510 void 511 linux_to_bsd_shmid64_ds(struct linux_shmid64_ds *lsp, struct shmid_ds *bsp) 512 { 513 514 linux_to_bsd_ipc64_perm(&lsp->l_shm_perm, &bsp->shm_perm); 515 bsp->shm_segsz = lsp->l_shm_segsz; 516 bsp->shm_lpid = lsp->l_shm_lpid; 517 bsp->shm_cpid = lsp->l_shm_cpid; 518 bsp->shm_nattch = lsp->l_shm_nattch; 519 bsp->shm_atime = lsp->l_shm_atime; 520 bsp->shm_dtime = lsp->l_shm_dtime; 521 bsp->shm_ctime = lsp->l_shm_ctime; 522 bsp->_shm_internal = (void*)lsp->l___unused5; /* XXX Oh well. */ 523 } 524 525 void 526 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct linux_shmid_ds *lsp) 527 { 528 529 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->l_shm_perm); 530 lsp->l_shm_segsz = bsp->shm_segsz; 531 lsp->l_shm_lpid = bsp->shm_lpid; 532 lsp->l_shm_cpid = bsp->shm_cpid; 533 lsp->l_shm_nattch = bsp->shm_nattch; 534 lsp->l_shm_atime = bsp->shm_atime; 535 lsp->l_shm_dtime = bsp->shm_dtime; 536 lsp->l_shm_ctime = bsp->shm_ctime; 537 lsp->l_private2 = bsp->_shm_internal; /* XXX */ 538 } 539 540 void 541 bsd_to_linux_shmid64_ds(struct shmid_ds *bsp, struct linux_shmid64_ds *lsp) 542 { 543 bsd_to_linux_ipc64_perm(&bsp->shm_perm, &lsp->l_shm_perm); 544 lsp->l_shm_segsz = bsp->shm_segsz; 545 lsp->l_shm_lpid = bsp->shm_lpid; 546 lsp->l_shm_cpid = bsp->shm_cpid; 547 lsp->l_shm_nattch = bsp->shm_nattch; 548 lsp->l_shm_atime = bsp->shm_atime; 549 lsp->l_shm_dtime = bsp->shm_dtime; 550 lsp->l_shm_ctime = bsp->shm_ctime; 551 lsp->l___unused5 = (u_long)bsp->_shm_internal; /* XXX */ 552 } 553 554 /* 555 * shmctl. 556 * 557 * The usual structure conversion and massaging is done. 558 */ 559 int 560 linux_sys_shmctl(struct lwp *l, const struct linux_sys_shmctl_args *uap, register_t *retval) 561 { 562 /* { 563 syscallarg(int) shmid; 564 syscallarg(int) cmd; 565 syscallarg(struct linux_shmid_ds *) buf; 566 } */ 567 struct shmid_ds bs; 568 struct linux_shmid_ds ls; 569 struct linux_shmid64_ds ls64; 570 struct linux_shminfo64 lsi64; 571 struct linux_shm_info lsi; 572 int error, i, cmd, shmid; 573 574 shmid = SCARG(uap, shmid); 575 cmd = SCARG(uap, cmd); 576 #ifdef LINUX_IPC_FORCE64 577 cmd |= LINUX_IPC_64; 578 #endif 579 580 switch (cmd & ~LINUX_IPC_64) { 581 case LINUX_SHM_STAT: 582 shmid = IXSEQ_TO_IPCID(shmid, shmsegs[shmid].shm_perm); 583 retval[0] = shmid; 584 /*FALLTHROUGH*/ 585 586 case LINUX_IPC_STAT: 587 error = shmctl1(l, shmid, IPC_STAT, &bs); 588 if (error != 0) 589 return error; 590 if (cmd & LINUX_IPC_64) { 591 bsd_to_linux_shmid64_ds(&bs, &ls64); 592 error = copyout(&ls64, SCARG(uap, buf), sizeof ls64); 593 } else { 594 bsd_to_linux_shmid_ds(&bs, &ls); 595 error = copyout(&ls, SCARG(uap, buf), sizeof ls); 596 } 597 return error; 598 599 case LINUX_IPC_SET: 600 if (cmd & LINUX_IPC_64) { 601 error = copyin(SCARG(uap, buf), &ls64, sizeof ls64); 602 linux_to_bsd_shmid64_ds(&ls64, &bs); 603 } else { 604 error = copyin(SCARG(uap, buf), &ls, sizeof ls); 605 linux_to_bsd_shmid_ds(&ls, &bs); 606 } 607 if (error != 0) 608 return error; 609 return shmctl1(l, shmid, IPC_SET, &bs); 610 611 case LINUX_IPC_RMID: 612 return shmctl1(l, shmid, IPC_RMID, NULL); 613 614 case LINUX_SHM_LOCK: 615 return shmctl1(l, shmid, SHM_LOCK, NULL); 616 617 case LINUX_SHM_UNLOCK: 618 return shmctl1(l, shmid, SHM_UNLOCK, NULL); 619 620 case LINUX_IPC_INFO: 621 memset(&lsi64, 0, sizeof lsi64); 622 lsi64.l_shmmax = shminfo.shmmax; 623 lsi64.l_shmmin = shminfo.shmmin; 624 lsi64.l_shmmni = shminfo.shmmni; 625 lsi64.l_shmseg = shminfo.shmseg; 626 lsi64.l_shmall = shminfo.shmall; 627 for (i = shminfo.shmmni - 1; i > 0; i--) 628 if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED) 629 break; 630 retval[0] = i; 631 return copyout(&lsi64, SCARG(uap, buf), sizeof lsi64); 632 633 case LINUX_SHM_INFO: 634 (void)memset(&lsi, 0, sizeof lsi); 635 lsi.l_used_ids = shm_nused; 636 for (i = 0; i < shminfo.shmmni; i++) 637 if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED) 638 lsi.l_shm_tot += 639 round_page(shmsegs[i].shm_segsz) / 640 uvmexp.pagesize; 641 lsi.l_shm_rss = 0; 642 lsi.l_shm_swp = 0; 643 lsi.l_swap_attempts = 0; 644 lsi.l_swap_successes = 0; 645 for (i = shminfo.shmmni - 1; i > 0; i--) 646 if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED) 647 break; 648 retval[0] = i; 649 return copyout(&lsi, SCARG(uap, buf), sizeof lsi); 650 651 default: 652 #ifdef DEBUG 653 printf("linux_sys_shmctl cmd %d\n", SCARG(uap, cmd)); 654 #endif 655 return EINVAL; 656 } 657 } 658 #endif /* SYSVSHM */ 659
Indexes created Mon Sep 22 05:09:51 GMT 2025