Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/common/linux_ipc.c
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1 /* $NetBSD: linux_ipc.c,v 1.37 2006/09/13 19:55:49 manu 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: linux_ipc.c,v 1.37 2006/09/13 19:55:49 manu Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_sysv.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/shm.h> 48 #include <sys/sem.h> 49 #include <sys/msg.h> 50 #include <sys/proc.h> 51 #include <sys/systm.h> 52 53 #include <sys/mount.h> 54 #include <sys/sa.h> 55 #include <sys/syscallargs.h> 56 57 #include <compat/linux/common/linux_types.h> 58 #include <compat/linux/common/linux_signal.h> 59 #include <compat/linux/common/linux_util.h> 60 #include <compat/linux/common/linux_ipc.h> 61 #include <compat/linux/common/linux_msg.h> 62 #include <compat/linux/common/linux_shm.h> 63 #include <compat/linux/common/linux_sem.h> 64 65 #include <compat/linux/linux_syscallargs.h> 66 #include <compat/linux/linux_syscall.h> 67 68 #include <compat/linux/common/linux_ipccall.h> 69 70 /* 71 * Note: Not all linux architechtures have explicit versions 72 * of the SYSV* syscalls. On the ones that don't 73 * we pretend that they are defined anyway. *_args and 74 * prototypes are defined in individual headers; 75 * syscalls.master lists those syscalls as NOARGS. 76 * 77 * The functions in multiarch are the ones that just need 78 * the arguments shuffled around and then use the 79 * normal NetBSD syscall. 80 * 81 * Function in multiarch: 82 * linux_sys_ipc : linux_ipccall.c 83 * liunx_semop : linux_ipccall.c 84 * linux_semget : linux_ipccall.c 85 * linux_msgsnd : linux_ipccall.c 86 * linux_msgrcv : linux_ipccall.c 87 * linux_msgget : linux_ipccall.c 88 * linux_shmdt : linux_ipccall.c 89 * linux_shmget : linux_ipccall.c 90 */ 91 92 #if defined (SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) 93 /* 94 * Convert between Linux and NetBSD ipc_perm structures. Only the 95 * order of the fields is different. 96 */ 97 void 98 linux_to_bsd_ipc_perm(lpp, bpp) 99 struct linux_ipc_perm *lpp; 100 struct ipc_perm *bpp; 101 { 102 103 bpp->_key = lpp->l_key; 104 bpp->uid = lpp->l_uid; 105 bpp->gid = lpp->l_gid; 106 bpp->cuid = lpp->l_cuid; 107 bpp->cgid = lpp->l_cgid; 108 bpp->mode = lpp->l_mode; 109 bpp->_seq = lpp->l_seq; 110 } 111 112 void 113 linux_to_bsd_ipc64_perm(lpp, bpp) 114 struct linux_ipc64_perm *lpp; 115 struct ipc_perm *bpp; 116 { 117 bpp->_key = lpp->l_key; 118 bpp->uid = lpp->l_uid; 119 bpp->gid = lpp->l_gid; 120 bpp->cuid = lpp->l_cuid; 121 bpp->cgid = lpp->l_cgid; 122 bpp->mode = lpp->l_mode; 123 bpp->_seq = lpp->l_seq; 124 } 125 126 void 127 bsd_to_linux_ipc_perm(bpp, lpp) 128 struct ipc_perm *bpp; 129 struct linux_ipc_perm *lpp; 130 { 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 void 142 bsd_to_linux_ipc64_perm(bpp, lpp) 143 struct ipc_perm *bpp; 144 struct linux_ipc64_perm *lpp; 145 { 146 lpp->l_key = bpp->_key; 147 lpp->l_uid = bpp->uid; 148 lpp->l_gid = bpp->gid; 149 lpp->l_cuid = bpp->cuid; 150 lpp->l_cgid = bpp->cgid; 151 lpp->l_mode = bpp->mode; 152 lpp->l_seq = bpp->_seq; 153 } 154 155 #endif 156 157 #ifdef SYSVSEM 158 /* 159 * Semaphore operations. Most constants and structures are the same on 160 * both systems. Only semctl() needs some extra work. 161 */ 162 163 /* 164 * Convert between Linux and NetBSD semid_ds structures. 165 */ 166 void 167 bsd_to_linux_semid_ds(bs, ls) 168 struct semid_ds *bs; 169 struct linux_semid_ds *ls; 170 { 171 172 bsd_to_linux_ipc_perm(&bs->sem_perm, &ls->l_sem_perm); 173 ls->l_sem_otime = bs->sem_otime; 174 ls->l_sem_ctime = bs->sem_ctime; 175 ls->l_sem_nsems = bs->sem_nsems; 176 ls->l_sem_base = bs->_sem_base; 177 } 178 179 void 180 linux_to_bsd_semid_ds(ls, bs) 181 struct linux_semid_ds *ls; 182 struct semid_ds *bs; 183 { 184 185 linux_to_bsd_ipc_perm(&ls->l_sem_perm, &bs->sem_perm); 186 bs->sem_otime = ls->l_sem_otime; 187 bs->sem_ctime = ls->l_sem_ctime; 188 bs->sem_nsems = ls->l_sem_nsems; 189 bs->_sem_base = ls->l_sem_base; 190 } 191 192 /* 193 * Most of this can be handled by directly passing the arguments on; we 194 * just need to frob the `cmd' and convert the semid_ds and semun. 195 */ 196 int 197 linux_sys_semctl(l, v, retval) 198 struct lwp *l; 199 void *v; 200 register_t *retval; 201 { 202 struct linux_sys_semctl_args /* { 203 syscallarg(int) semid; 204 syscallarg(int) semnum; 205 syscallarg(int) cmd; 206 syscallarg(union linux_semun) arg; 207 } */ *uap = v; 208 struct semid_ds sembuf; 209 struct linux_semid_ds lsembuf; 210 union __semun semun; 211 int cmd, error; 212 void *pass_arg = NULL; 213 214 cmd = SCARG(uap, cmd); 215 216 switch (cmd) { 217 case LINUX_IPC_SET: 218 pass_arg = &sembuf; 219 cmd = IPC_SET; 220 break; 221 222 case LINUX_IPC_STAT: 223 pass_arg = &sembuf; 224 cmd = IPC_STAT; 225 break; 226 227 case LINUX_IPC_RMID: 228 cmd = IPC_RMID; 229 break; 230 231 case LINUX_GETVAL: 232 cmd = GETVAL; 233 break; 234 235 case LINUX_GETPID: 236 cmd = GETPID; 237 break; 238 239 case LINUX_GETNCNT: 240 cmd = GETNCNT; 241 break; 242 243 case LINUX_GETZCNT: 244 cmd = GETZCNT; 245 break; 246 247 case LINUX_GETALL: 248 pass_arg = &semun; 249 semun.array = SCARG(uap, arg).l_array; 250 cmd = GETALL; 251 break; 252 253 case LINUX_SETVAL: 254 pass_arg = &semun; 255 semun.val = SCARG(uap, arg).l_val; 256 cmd = SETVAL; 257 break; 258 259 case LINUX_SETALL: 260 pass_arg = &semun; 261 semun.array = SCARG(uap, arg).l_array; 262 cmd = SETALL; 263 break; 264 265 default: 266 return (EINVAL); 267 } 268 269 if (cmd == IPC_SET) { 270 error = copyin(SCARG(uap, arg).l_buf, &lsembuf, 271 sizeof(lsembuf)); 272 if (error) 273 return (error); 274 linux_to_bsd_semid_ds(&lsembuf, &sembuf); 275 } 276 277 error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd, 278 pass_arg, retval); 279 280 if (error == 0 && cmd == IPC_STAT) { 281 bsd_to_linux_semid_ds(&sembuf, &lsembuf); 282 error = copyout(&lsembuf, SCARG(uap, arg).l_buf, 283 sizeof(lsembuf)); 284 } 285 286 return (error); 287 } 288 #endif /* SYSVSEM */ 289 290 #ifdef SYSVMSG 291 292 void 293 linux_to_bsd_msqid_ds(lmp, bmp) 294 struct linux_msqid_ds *lmp; 295 struct msqid_ds *bmp; 296 { 297 298 linux_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm); 299 bmp->_msg_first = lmp->l_msg_first; 300 bmp->_msg_last = lmp->l_msg_last; 301 bmp->_msg_cbytes = lmp->l_msg_cbytes; 302 bmp->msg_qnum = lmp->l_msg_qnum; 303 bmp->msg_qbytes = lmp->l_msg_qbytes; 304 bmp->msg_lspid = lmp->l_msg_lspid; 305 bmp->msg_lrpid = lmp->l_msg_lrpid; 306 bmp->msg_stime = lmp->l_msg_stime; 307 bmp->msg_rtime = lmp->l_msg_rtime; 308 bmp->msg_ctime = lmp->l_msg_ctime; 309 } 310 311 void 312 bsd_to_linux_msqid_ds(bmp, lmp) 313 struct msqid_ds *bmp; 314 struct linux_msqid_ds *lmp; 315 { 316 317 bsd_to_linux_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm); 318 lmp->l_msg_first = bmp->_msg_first; 319 lmp->l_msg_last = bmp->_msg_last; 320 lmp->l_msg_cbytes = bmp->_msg_cbytes; 321 lmp->l_msg_qnum = bmp->msg_qnum; 322 lmp->l_msg_qbytes = bmp->msg_qbytes; 323 lmp->l_msg_lspid = bmp->msg_lspid; 324 lmp->l_msg_lrpid = bmp->msg_lrpid; 325 lmp->l_msg_stime = bmp->msg_stime; 326 lmp->l_msg_rtime = bmp->msg_rtime; 327 lmp->l_msg_ctime = bmp->msg_ctime; 328 } 329 330 int 331 linux_sys_msgctl(l, v, retval) 332 struct lwp *l; 333 void *v; 334 register_t *retval; 335 { 336 struct linux_sys_msgctl_args /* { 337 syscallarg(int) msqid; 338 syscallarg(int) cmd; 339 syscallarg(struct linux_msqid_ds *) buf; 340 } */ *uap = v; 341 struct proc *p = l->l_proc; 342 caddr_t sg; 343 struct sys___msgctl13_args nua; 344 struct msqid_ds *bmp, bm; 345 struct linux_msqid_ds lm; 346 int error; 347 348 SCARG(&nua, msqid) = SCARG(uap, msqid); 349 switch (SCARG(uap, cmd)) { 350 case LINUX_IPC_STAT: 351 sg = stackgap_init(p, 0); 352 bmp = stackgap_alloc(p, &sg, sizeof (struct msqid_ds)); 353 SCARG(&nua, cmd) = IPC_STAT; 354 SCARG(&nua, buf) = bmp; 355 if ((error = sys___msgctl13(l, &nua, retval))) 356 return error; 357 if ((error = copyin(bmp, &bm, sizeof bm))) 358 return error; 359 bsd_to_linux_msqid_ds(&bm, &lm); 360 return copyout(&lm, SCARG(uap, buf), sizeof lm); 361 case LINUX_IPC_SET: 362 if ((error = copyin(SCARG(uap, buf), &lm, sizeof lm))) 363 return error; 364 linux_to_bsd_msqid_ds(&lm, &bm); 365 sg = stackgap_init(p, 0); 366 bmp = stackgap_alloc(p, &sg, sizeof bm); 367 if ((error = copyout(&bm, bmp, sizeof bm))) 368 return error; 369 SCARG(&nua, cmd) = IPC_SET; 370 SCARG(&nua, buf) = bmp; 371 break; 372 case LINUX_IPC_RMID: 373 SCARG(&nua, cmd) = IPC_RMID; 374 SCARG(&nua, buf) = NULL; 375 break; 376 default: 377 return EINVAL; 378 } 379 return sys___msgctl13(l, &nua, retval); 380 } 381 #endif /* SYSVMSG */ 382 383 #ifdef SYSVSHM 384 /* 385 * shmget(2). Just make sure the Linux-compatible shmat() semantics 386 * is enabled for the segment, so that shmat() succeeds even when 387 * the segment would be removed. 388 */ 389 int 390 linux_sys_shmget(l, v, retval) 391 struct lwp *l; 392 void *v; 393 register_t *retval; 394 { 395 struct sys_shmget_args /* { 396 syscallarg(key_t) key; 397 syscallarg(size_t) size; 398 syscallarg(int) shmflg; 399 } */ *uap = v; 400 401 SCARG(uap, shmflg) |= _SHM_RMLINGER; 402 return sys_shmget(l, uap, retval); 403 } 404 405 /* 406 * shmat(2). Very straightforward, except that Linux passes a pointer 407 * in which the return value is to be passed. This is subsequently 408 * handled by libc, apparently. 409 */ 410 #ifndef __amd64__ 411 int 412 linux_sys_shmat(l, v, retval) 413 struct lwp *l; 414 void *v; 415 register_t *retval; 416 { 417 struct linux_sys_shmat_args /* { 418 syscallarg(int) shmid; 419 syscallarg(void *) shmaddr; 420 syscallarg(int) shmflg; 421 syscallarg(u_long *) raddr; 422 } */ *uap = v; 423 int error; 424 425 if ((error = sys_shmat(l, uap, retval))) 426 return error; 427 428 #ifndef __amd64__ 429 if ((error = copyout(&retval[0], (caddr_t) SCARG(uap, raddr), 430 sizeof retval[0]))) 431 return error; 432 433 retval[0] = 0; 434 #endif 435 return 0; 436 } 437 #endif /* __amd64__ */ 438 439 /* 440 * Convert between Linux and NetBSD shmid_ds structures. 441 * The order of the fields is once again the difference, and 442 * we also need a place to store the internal data pointer 443 * in, which is unfortunately stored in this structure. 444 * 445 * We abuse a Linux internal field for that. 446 */ 447 void 448 linux_to_bsd_shmid_ds(lsp, bsp) 449 struct linux_shmid_ds *lsp; 450 struct shmid_ds *bsp; 451 { 452 453 linux_to_bsd_ipc_perm(&lsp->l_shm_perm, &bsp->shm_perm); 454 bsp->shm_segsz = lsp->l_shm_segsz; 455 bsp->shm_lpid = lsp->l_shm_lpid; 456 bsp->shm_cpid = lsp->l_shm_cpid; 457 bsp->shm_nattch = lsp->l_shm_nattch; 458 bsp->shm_atime = lsp->l_shm_atime; 459 bsp->shm_dtime = lsp->l_shm_dtime; 460 bsp->shm_ctime = lsp->l_shm_ctime; 461 bsp->_shm_internal = lsp->l_private2; /* XXX Oh well. */ 462 } 463 464 void 465 linux_to_bsd_shmid64_ds(lsp, bsp) 466 struct linux_shmid64_ds *lsp; 467 struct shmid_ds *bsp; 468 { 469 470 linux_to_bsd_ipc64_perm(&lsp->l_shm_perm, &bsp->shm_perm); 471 bsp->shm_segsz = lsp->l_shm_segsz; 472 bsp->shm_lpid = lsp->l_shm_lpid; 473 bsp->shm_cpid = lsp->l_shm_cpid; 474 bsp->shm_nattch = lsp->l_shm_nattch; 475 bsp->shm_atime = lsp->l_shm_atime; 476 bsp->shm_dtime = lsp->l_shm_dtime; 477 bsp->shm_ctime = lsp->l_shm_ctime; 478 bsp->_shm_internal = (void*)lsp->l___unused5; /* XXX Oh well. */ 479 } 480 481 void 482 bsd_to_linux_shmid_ds(bsp, lsp) 483 struct shmid_ds *bsp; 484 struct linux_shmid_ds *lsp; 485 { 486 487 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->l_shm_perm); 488 lsp->l_shm_segsz = bsp->shm_segsz; 489 lsp->l_shm_lpid = bsp->shm_lpid; 490 lsp->l_shm_cpid = bsp->shm_cpid; 491 lsp->l_shm_nattch = bsp->shm_nattch; 492 lsp->l_shm_atime = bsp->shm_atime; 493 lsp->l_shm_dtime = bsp->shm_dtime; 494 lsp->l_shm_ctime = bsp->shm_ctime; 495 lsp->l_private2 = bsp->_shm_internal; /* XXX */ 496 } 497 498 void 499 bsd_to_linux_shmid64_ds(bsp, lsp) 500 struct shmid_ds *bsp; 501 struct linux_shmid64_ds *lsp; 502 { 503 bsd_to_linux_ipc64_perm(&bsp->shm_perm, &lsp->l_shm_perm); 504 lsp->l_shm_segsz = bsp->shm_segsz; 505 lsp->l_shm_lpid = bsp->shm_lpid; 506 lsp->l_shm_cpid = bsp->shm_cpid; 507 lsp->l_shm_nattch = bsp->shm_nattch; 508 lsp->l_shm_atime = bsp->shm_atime; 509 lsp->l_shm_dtime = bsp->shm_dtime; 510 lsp->l_shm_ctime = bsp->shm_ctime; 511 lsp->l___unused5 = (u_long)bsp->_shm_internal; /* XXX */ 512 } 513 514 /* 515 * shmctl.SHM_LOCK and SHM_UNLOCK are passed on, but currently not implemented 516 * by NetBSD itself. 517 * 518 * The usual structure conversion and massaging is done. 519 */ 520 int 521 linux_sys_shmctl(l, v, retval) 522 struct lwp *l; 523 void *v; 524 register_t *retval; 525 { 526 struct linux_sys_shmctl_args /* { 527 syscallarg(int) shmid; 528 syscallarg(int) cmd; 529 syscallarg(struct linux_shmid_ds *) buf; 530 } */ *uap = v; 531 struct proc *p = l->l_proc; 532 caddr_t sg; 533 struct sys___shmctl13_args nua; 534 struct shmid_ds *bsp, bs; 535 struct linux_shmid_ds ls; 536 struct linux_shmid64_ds ls64; 537 struct linux_shminfo64 lsi64; 538 struct linux_shm_info lsi; 539 int error, i, cmd; 540 541 SCARG(&nua, shmid) = SCARG(uap, shmid); 542 cmd = SCARG(uap, cmd); 543 switch (cmd) { 544 case LINUX_IPC_STAT: 545 case LINUX_SHM_STAT: 546 sg = stackgap_init(p, 0); 547 bsp = stackgap_alloc(p, &sg, sizeof(struct shmid_ds)); 548 SCARG(&nua, cmd) = IPC_STAT; 549 SCARG(&nua, buf) = bsp; 550 if ((error = sys___shmctl13(l, &nua, retval))) 551 return error; 552 if ((error = copyin(SCARG(&nua, buf), &bs, sizeof bs))) 553 return error; 554 bsd_to_linux_shmid_ds(&bs, &ls); 555 if (cmd == LINUX_SHM_STAT) 556 retval[0] = IXSEQ_TO_IPCID(bs.shm_perm._key, 557 bs.shm_perm); 558 return copyout(&ls, SCARG(uap, buf), sizeof ls); 559 560 case LINUX_IPC_STAT|LINUX_IPC_64: 561 case LINUX_SHM_STAT|LINUX_IPC_64: 562 sg = stackgap_init(p,0); 563 bsp = stackgap_alloc(p, &sg, sizeof(struct linux_shmid64_ds)); 564 SCARG(&nua, cmd) = IPC_STAT; 565 SCARG(&nua, buf) = bsp; 566 if ((error = sys___shmctl13(l, &nua, retval))) 567 return error; 568 if ((error = copyin(SCARG(&nua, buf), &bs, sizeof bs))) 569 return error; 570 bsd_to_linux_shmid64_ds(&bs, &ls64); 571 if (cmd == (LINUX_SHM_STAT|LINUX_IPC_64)) { 572 retval[0] = IXSEQ_TO_IPCID(bs.shm_perm._key, 573 bs.shm_perm); 574 } 575 return copyout(&ls64, SCARG(uap, buf), sizeof ls64); 576 577 case LINUX_IPC_SET: 578 if ((error = copyin(SCARG(uap, buf), &ls, sizeof ls))) 579 return error; 580 linux_to_bsd_shmid_ds(&ls, &bs); 581 sg = stackgap_init(p, 0); 582 bsp = stackgap_alloc(p, &sg, sizeof bs); 583 if ((error = copyout(&bs, bsp, sizeof bs))) 584 return error; 585 SCARG(&nua, cmd) = IPC_SET; 586 SCARG(&nua, buf) = bsp; 587 break; 588 589 case LINUX_IPC_RMID: 590 SCARG(&nua, cmd) = IPC_RMID; 591 SCARG(&nua, buf) = NULL; 592 break; 593 594 case LINUX_SHM_LOCK: 595 SCARG(&nua, cmd) = SHM_LOCK; 596 SCARG(&nua, buf) = NULL; 597 break; 598 599 case LINUX_SHM_UNLOCK: 600 SCARG(&nua, cmd) = SHM_UNLOCK; 601 SCARG(&nua, buf) = NULL; 602 break; 603 604 case LINUX_IPC_INFO: 605 memset(&lsi64, 0, sizeof lsi64); 606 lsi64.l_shmmax = shminfo.shmmax; 607 lsi64.l_shmmin = shminfo.shmmin; 608 lsi64.l_shmmni = shminfo.shmmni; 609 lsi64.l_shmseg = shminfo.shmseg; 610 lsi64.l_shmall = shminfo.shmall; 611 return copyout(&lsi64, SCARG(uap, buf), sizeof lsi64); 612 613 case LINUX_SHM_INFO: 614 (void)memset(&lsi, 0, sizeof lsi); 615 lsi.l_used_ids = shm_nused; 616 for (i = 0; i < shminfo.shmmni; i++) 617 if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED) 618 lsi.l_shm_tot += shmsegs[i].shm_segsz; 619 lsi.l_shm_rss = 0; 620 lsi.l_shm_swp = 0; 621 lsi.l_swap_attempts = 0; 622 lsi.l_swap_successes = 0; 623 return copyout(&lsi, SCARG(uap, buf), sizeof lsi); 624 625 default: 626 #ifdef DEBUG 627 printf("linux_sys_shmctl cmd %d\n", SCARG(uap, cmd)); 628 #endif 629 return EINVAL; 630 } 631 return sys___shmctl13(l, &nua, retval); 632 } 633 #endif /* SYSVSHM */
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