svr4_ipc.c revision 299215
1/*- 2 * Copyright (c) 1995 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Christos Zoulas. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29/*- 30 * Portions of this code have been derived from software contributed 31 * to the FreeBSD Project by Mark Newton. 32 * 33 * Copyright (c) 1999 Mark Newton 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. The name of the author may not be used to endorse or promote products 45 * derived from this software without specific prior written permission 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 * 58 * XXX- This code is presently a no-op on FreeBSD (and isn't compiled due 59 * to preprocessor conditionals). A nice project for a kernel hacking 60 * novice might be to MakeItGo, but I have more important fish to fry 61 * at present. 62 * 63 * Derived from: $NetBSD: svr4_ipc.c,v 1.7 1998/10/19 22:43:00 tron Exp $ 64 */ 65 66#include <sys/cdefs.h> 67__FBSDID("$FreeBSD: stable/10/sys/compat/svr4/svr4_ipc.c 299215 2016-05-07 08:30:21Z dchagin $"); 68 69#include "opt_sysvipc.h" 70 71#include <sys/param.h> 72#include <sys/ipc.h> 73#include <sys/msg.h> 74#include <sys/proc.h> 75#include <sys/sem.h> 76#include <sys/shm.h> 77#include <sys/syscallsubr.h> 78#include <sys/sysproto.h> 79#include <sys/systm.h> 80#include <sys/time.h> 81 82#include <compat/svr4/svr4.h> 83#include <compat/svr4/svr4_types.h> 84#include <compat/svr4/svr4_signal.h> 85#include <compat/svr4/svr4_proto.h> 86#include <compat/svr4/svr4_util.h> 87#include <compat/svr4/svr4_ipc.h> 88 89static void svr4_to_bsd_ipc_perm(const struct svr4_ipc_perm *, 90 struct ipc_perm *); 91static void bsd_to_svr4_ipc_perm(const struct ipc_perm *, 92 struct svr4_ipc_perm *); 93static void bsd_to_svr4_semid_ds(const struct semid_ds *, 94 struct svr4_semid_ds *); 95static void svr4_to_bsd_semid_ds(const struct svr4_semid_ds *, 96 struct semid_ds *); 97static int svr4_semop(struct thread *, void *); 98static int svr4_semget(struct thread *, void *); 99static int svr4_semctl(struct thread *, void *); 100static void bsd_to_svr4_msqid_ds(const struct msqid_ds *, 101 struct svr4_msqid_ds *); 102static void svr4_to_bsd_msqid_ds(const struct svr4_msqid_ds *, 103 struct msqid_ds *); 104static int svr4_msgsnd(struct thread *, void *); 105static int svr4_msgrcv(struct thread *, void *); 106static int svr4_msgget(struct thread *, void *); 107static int svr4_msgctl(struct thread *, void *); 108static void bsd_to_svr4_shmid_ds(const struct shmid_ds *, 109 struct svr4_shmid_ds *); 110static void svr4_to_bsd_shmid_ds(const struct svr4_shmid_ds *, 111 struct shmid_ds *); 112static int svr4_shmat(struct thread *, void *); 113static int svr4_shmdt(struct thread *, void *); 114static int svr4_shmget(struct thread *, void *); 115static int svr4_shmctl(struct thread *, void *); 116 117static void 118svr4_to_bsd_ipc_perm(spp, bpp) 119 const struct svr4_ipc_perm *spp; 120 struct ipc_perm *bpp; 121{ 122 bpp->key = spp->key; 123 bpp->uid = spp->uid; 124 bpp->gid = spp->gid; 125 bpp->cuid = spp->cuid; 126 bpp->cgid = spp->cgid; 127 bpp->mode = spp->mode; 128 bpp->seq = spp->seq; 129} 130 131static void 132bsd_to_svr4_ipc_perm(bpp, spp) 133 const struct ipc_perm *bpp; 134 struct svr4_ipc_perm *spp; 135{ 136 spp->key = bpp->key; 137 spp->uid = bpp->uid; 138 spp->gid = bpp->gid; 139 spp->cuid = bpp->cuid; 140 spp->cgid = bpp->cgid; 141 spp->mode = bpp->mode; 142 spp->seq = bpp->seq; 143} 144 145static void 146bsd_to_svr4_semid_ds(bds, sds) 147 const struct semid_ds *bds; 148 struct svr4_semid_ds *sds; 149{ 150 bzero(sds, sizeof(*sds)); 151 bsd_to_svr4_ipc_perm(&bds->sem_perm, &sds->sem_perm); 152 sds->sem_base = (struct svr4_sem *) bds->sem_base; 153 sds->sem_nsems = bds->sem_nsems; 154 sds->sem_otime = bds->sem_otime; 155 sds->sem_ctime = bds->sem_ctime; 156} 157 158static void 159svr4_to_bsd_semid_ds(sds, bds) 160 const struct svr4_semid_ds *sds; 161 struct semid_ds *bds; 162{ 163 svr4_to_bsd_ipc_perm(&sds->sem_perm, &bds->sem_perm); 164 bds->sem_base = (struct sem *) bds->sem_base; 165 bds->sem_nsems = sds->sem_nsems; 166 bds->sem_otime = sds->sem_otime; 167 bds->sem_ctime = sds->sem_ctime; 168} 169 170struct svr4_sys_semctl_args { 171 int what; 172 int semid; 173 int semnum; 174 int cmd; 175 union semun arg; 176}; 177 178static int 179svr4_semctl(td, v) 180 struct thread *td; 181 void *v; 182{ 183 struct svr4_sys_semctl_args *uap = v; 184 struct svr4_semid_ds ss; 185 struct semid_ds bs; 186 union semun semun; 187 register_t rval; 188 int cmd, error; 189 190 switch (uap->cmd) { 191 case SVR4_SEM_GETZCNT: 192 cmd = GETZCNT; 193 break; 194 195 case SVR4_SEM_GETNCNT: 196 cmd = GETNCNT; 197 break; 198 199 case SVR4_SEM_GETPID: 200 cmd = GETPID; 201 break; 202 203 case SVR4_SEM_GETVAL: 204 cmd = GETVAL; 205 break; 206 207 case SVR4_SEM_SETVAL: 208 cmd = SETVAL; 209 break; 210 211 case SVR4_SEM_GETALL: 212 cmd = GETVAL; 213 break; 214 215 case SVR4_SEM_SETALL: 216 cmd = SETVAL; 217 break; 218 219 case SVR4_IPC_STAT: 220 cmd = IPC_STAT; 221 semun.buf = &bs; 222 error = kern_semctl(td, uap->semid, uap->semnum, cmd, &semun, 223 &rval); 224 if (error) 225 return (error); 226 bsd_to_svr4_semid_ds(&bs, &ss); 227 error = copyout(&ss, uap->arg.buf, sizeof(ss)); 228 if (error == 0) 229 td->td_retval[0] = rval; 230 return (error); 231 232 case SVR4_IPC_SET: 233 cmd = IPC_SET; 234 error = copyin(uap->arg.buf, (caddr_t) &ss, sizeof ss); 235 if (error) 236 return (error); 237 svr4_to_bsd_semid_ds(&ss, &bs); 238 semun.buf = &bs; 239 return (kern_semctl(td, uap->semid, uap->semnum, cmd, &semun, 240 td->td_retval)); 241 242 case SVR4_IPC_RMID: 243 cmd = IPC_RMID; 244 break; 245 246 default: 247 return EINVAL; 248 } 249 250 return (kern_semctl(td, uap->semid, uap->semnum, cmd, &uap->arg, 251 td->td_retval)); 252} 253 254struct svr4_sys_semget_args { 255 int what; 256 svr4_key_t key; 257 int nsems; 258 int semflg; 259}; 260 261static int 262svr4_semget(td, v) 263 struct thread *td; 264 void *v; 265{ 266 struct svr4_sys_semget_args *uap = v; 267 struct semget_args ap; 268 269 ap.key = uap->key; 270 ap.nsems = uap->nsems; 271 ap.semflg = uap->semflg; 272 273 return sys_semget(td, &ap); 274} 275 276struct svr4_sys_semop_args { 277 int what; 278 int semid; 279 struct svr4_sembuf * sops; 280 u_int nsops; 281}; 282 283static int 284svr4_semop(td, v) 285 struct thread *td; 286 void *v; 287{ 288 struct svr4_sys_semop_args *uap = v; 289 struct semop_args ap; 290 291 ap.semid = uap->semid; 292 /* These are the same */ 293 ap.sops = (struct sembuf *) uap->sops; 294 ap.nsops = uap->nsops; 295 296 return sys_semop(td, &ap); 297} 298 299int 300svr4_sys_semsys(td, uap) 301 struct thread *td; 302 struct svr4_sys_semsys_args *uap; 303{ 304 305 DPRINTF(("svr4_semsys(%d)\n", uap->what)); 306 307 switch (uap->what) { 308 case SVR4_semctl: 309 return svr4_semctl(td, uap); 310 case SVR4_semget: 311 return svr4_semget(td, uap); 312 case SVR4_semop: 313 return svr4_semop(td, uap); 314 default: 315 return EINVAL; 316 } 317} 318 319 320static void 321bsd_to_svr4_msqid_ds(bds, sds) 322 const struct msqid_ds *bds; 323 struct svr4_msqid_ds *sds; 324{ 325 bzero(sds, sizeof(*sds)); 326 bsd_to_svr4_ipc_perm(&bds->msg_perm, &sds->msg_perm); 327 sds->msg_first = (struct svr4_msg *) bds->msg_first; 328 sds->msg_last = (struct svr4_msg *) bds->msg_last; 329 sds->msg_cbytes = bds->msg_cbytes; 330 sds->msg_qnum = bds->msg_qnum; 331 sds->msg_qbytes = bds->msg_qbytes; 332 sds->msg_lspid = bds->msg_lspid; 333 sds->msg_lrpid = bds->msg_lrpid; 334 sds->msg_stime = bds->msg_stime; 335 sds->msg_rtime = bds->msg_rtime; 336 sds->msg_ctime = bds->msg_ctime; 337} 338 339static void 340svr4_to_bsd_msqid_ds(sds, bds) 341 const struct svr4_msqid_ds *sds; 342 struct msqid_ds *bds; 343{ 344 svr4_to_bsd_ipc_perm(&sds->msg_perm, &bds->msg_perm); 345 bds->msg_first = (struct msg *) sds->msg_first; 346 bds->msg_last = (struct msg *) sds->msg_last; 347 bds->msg_cbytes = sds->msg_cbytes; 348 bds->msg_qnum = sds->msg_qnum; 349 bds->msg_qbytes = sds->msg_qbytes; 350 bds->msg_lspid = sds->msg_lspid; 351 bds->msg_lrpid = sds->msg_lrpid; 352 bds->msg_stime = sds->msg_stime; 353 bds->msg_rtime = sds->msg_rtime; 354 bds->msg_ctime = sds->msg_ctime; 355} 356 357struct svr4_sys_msgsnd_args { 358 int what; 359 int msqid; 360 void * msgp; 361 size_t msgsz; 362 int msgflg; 363}; 364 365static int 366svr4_msgsnd(td, v) 367 struct thread *td; 368 void *v; 369{ 370 struct svr4_sys_msgsnd_args *uap = v; 371 struct msgsnd_args ap; 372 373 ap.msqid = uap->msqid; 374 ap.msgp = uap->msgp; 375 ap.msgsz = uap->msgsz; 376 ap.msgflg = uap->msgflg; 377 378 return sys_msgsnd(td, &ap); 379} 380 381struct svr4_sys_msgrcv_args { 382 int what; 383 int msqid; 384 void * msgp; 385 size_t msgsz; 386 long msgtyp; 387 int msgflg; 388}; 389 390static int 391svr4_msgrcv(td, v) 392 struct thread *td; 393 void *v; 394{ 395 struct svr4_sys_msgrcv_args *uap = v; 396 struct msgrcv_args ap; 397 398 ap.msqid = uap->msqid; 399 ap.msgp = uap->msgp; 400 ap.msgsz = uap->msgsz; 401 ap.msgtyp = uap->msgtyp; 402 ap.msgflg = uap->msgflg; 403 404 return sys_msgrcv(td, &ap); 405} 406 407struct svr4_sys_msgget_args { 408 int what; 409 svr4_key_t key; 410 int msgflg; 411}; 412 413static int 414svr4_msgget(td, v) 415 struct thread *td; 416 void *v; 417{ 418 struct svr4_sys_msgget_args *uap = v; 419 struct msgget_args ap; 420 421 ap.key = uap->key; 422 ap.msgflg = uap->msgflg; 423 424 return sys_msgget(td, &ap); 425} 426 427struct svr4_sys_msgctl_args { 428 int what; 429 int msqid; 430 int cmd; 431 struct svr4_msqid_ds * buf; 432}; 433 434static int 435svr4_msgctl(td, v) 436 struct thread *td; 437 void *v; 438{ 439 struct svr4_sys_msgctl_args *uap = v; 440 struct svr4_msqid_ds ss; 441 struct msqid_ds bs; 442 int error; 443 444 switch (uap->cmd) { 445 case SVR4_IPC_STAT: 446 error = kern_msgctl(td, uap->msqid, IPC_STAT, &bs); 447 if (error) 448 return error; 449 bsd_to_svr4_msqid_ds(&bs, &ss); 450 return copyout(&ss, uap->buf, sizeof ss); 451 452 case SVR4_IPC_SET: 453 error = copyin(uap->buf, &ss, sizeof ss); 454 if (error) 455 return error; 456 svr4_to_bsd_msqid_ds(&ss, &bs); 457 return (kern_msgctl(td, uap->msqid, IPC_SET, &bs)); 458 459 case SVR4_IPC_RMID: 460 return (kern_msgctl(td, uap->msqid, IPC_RMID, NULL)); 461 462 default: 463 return EINVAL; 464 } 465} 466 467int 468svr4_sys_msgsys(td, uap) 469 struct thread *td; 470 struct svr4_sys_msgsys_args *uap; 471{ 472 473 DPRINTF(("svr4_msgsys(%d)\n", uap->what)); 474 475 switch (uap->what) { 476 case SVR4_msgsnd: 477 return svr4_msgsnd(td, uap); 478 case SVR4_msgrcv: 479 return svr4_msgrcv(td, uap); 480 case SVR4_msgget: 481 return svr4_msgget(td, uap); 482 case SVR4_msgctl: 483 return svr4_msgctl(td, uap); 484 default: 485 return EINVAL; 486 } 487} 488 489 490static void 491bsd_to_svr4_shmid_ds(bds, sds) 492 const struct shmid_ds *bds; 493 struct svr4_shmid_ds *sds; 494{ 495 bzero(sds, sizeof(*sds)); 496 bsd_to_svr4_ipc_perm(&bds->shm_perm, &sds->shm_perm); 497 sds->shm_segsz = bds->shm_segsz; 498 sds->shm_lkcnt = 0; 499 sds->shm_lpid = bds->shm_lpid; 500 sds->shm_cpid = bds->shm_cpid; 501 sds->shm_amp = 0; 502 sds->shm_nattch = bds->shm_nattch; 503 sds->shm_cnattch = 0; 504 sds->shm_atime = bds->shm_atime; 505 sds->shm_dtime = bds->shm_dtime; 506 sds->shm_ctime = bds->shm_ctime; 507} 508 509static void 510svr4_to_bsd_shmid_ds(sds, bds) 511 const struct svr4_shmid_ds *sds; 512 struct shmid_ds *bds; 513{ 514 svr4_to_bsd_ipc_perm(&sds->shm_perm, &bds->shm_perm); 515 bds->shm_segsz = sds->shm_segsz; 516 bds->shm_lpid = sds->shm_lpid; 517 bds->shm_cpid = sds->shm_cpid; 518 bds->shm_nattch = sds->shm_nattch; 519 bds->shm_atime = sds->shm_atime; 520 bds->shm_dtime = sds->shm_dtime; 521 bds->shm_ctime = sds->shm_ctime; 522} 523 524struct svr4_sys_shmat_args { 525 int what; 526 int shmid; 527 void * shmaddr; 528 int shmflg; 529}; 530 531static int 532svr4_shmat(td, v) 533 struct thread *td; 534 void *v; 535{ 536 struct svr4_sys_shmat_args *uap = v; 537 struct shmat_args ap; 538 539 ap.shmid = uap->shmid; 540 ap.shmaddr = uap->shmaddr; 541 ap.shmflg = uap->shmflg; 542 543 return sys_shmat(td, &ap); 544} 545 546struct svr4_sys_shmdt_args { 547 int what; 548 void * shmaddr; 549}; 550 551static int 552svr4_shmdt(td, v) 553 struct thread *td; 554 void *v; 555{ 556 struct svr4_sys_shmdt_args *uap = v; 557 struct shmdt_args ap; 558 559 ap.shmaddr = uap->shmaddr; 560 561 return sys_shmdt(td, &ap); 562} 563 564struct svr4_sys_shmget_args { 565 int what; 566 key_t key; 567 int size; 568 int shmflg; 569}; 570 571static int 572svr4_shmget(td, v) 573 struct thread *td; 574 void *v; 575{ 576 struct svr4_sys_shmget_args *uap = v; 577 struct shmget_args ap; 578 579 ap.key = uap->key; 580 ap.size = uap->size; 581 ap.shmflg = uap->shmflg; 582 583 return sys_shmget(td, &ap); 584} 585 586struct svr4_sys_shmctl_args { 587 int what; 588 int shmid; 589 int cmd; 590 struct svr4_shmid_ds * buf; 591}; 592 593int 594svr4_shmctl(td, v) 595 struct thread *td; 596 void *v; 597{ 598 struct svr4_sys_shmctl_args *uap = v; 599 struct shmid_ds bs; 600 struct svr4_shmid_ds ss; 601 size_t bufsize; 602 int cmd, error; 603 604 if (uap->buf != NULL) { 605 switch (uap->cmd) { 606 case SVR4_IPC_SET: 607 case SVR4_SHM_LOCK: 608 case SVR4_SHM_UNLOCK: 609 error = copyin(uap->buf, &ss, sizeof(ss)); 610 if (error) 611 return (error); 612 svr4_to_bsd_shmid_ds(&ss, &bs); 613 break; 614 default: 615 return (EINVAL); 616 } 617 } 618 619 switch (uap->cmd) { 620 case SVR4_IPC_STAT: 621 cmd = IPC_STAT; 622 break; 623 case SVR4_IPC_SET: 624 cmd = IPC_SET; 625 break; 626 case SVR4_IPC_RMID: 627 cmd = IPC_RMID; 628 break; 629 case SVR4_SHM_LOCK: 630 cmd = SHM_LOCK; 631 break; 632 case SVR4_SHM_UNLOCK: 633 cmd = SHM_UNLOCK; 634 break; 635 default: 636 return (EINVAL); 637 } 638 639 error = kern_shmctl(td, uap->shmid, cmd, &bs, &bufsize); 640 if (error) 641 return (error); 642 643 switch (uap->cmd) { 644 case SVR4_IPC_STAT: 645 if (uap->buf != NULL) { 646 bsd_to_svr4_shmid_ds(&bs, &ss); 647 error = copyout(&ss, uap->buf, sizeof(ss)); 648 } 649 break; 650 } 651 652 return (error); 653} 654 655int 656svr4_sys_shmsys(td, uap) 657 struct thread *td; 658 struct svr4_sys_shmsys_args *uap; 659{ 660 661 DPRINTF(("svr4_shmsys(%d)\n", uap->what)); 662 663 switch (uap->what) { 664 case SVR4_shmat: 665 return svr4_shmat(td, uap); 666 case SVR4_shmdt: 667 return svr4_shmdt(td, uap); 668 case SVR4_shmget: 669 return svr4_shmget(td, uap); 670 case SVR4_shmctl: 671 return svr4_shmctl(td, uap); 672 default: 673 return ENOSYS; 674 } 675} 676 677MODULE_DEPEND(svr4elf, sysvshm, 1, 1, 1); 678MODULE_DEPEND(svr4elf, sysvmsg, 1, 1, 1); 679MODULE_DEPEND(svr4elf, sysvsem, 1, 1, 1); 680