linux_ipc.c revision 1.21
1 /* $NetBSD: linux_ipc.c,v 1.21 1999/08/25 04:52:44 thorpej 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 "opt_sysv.h" 40 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/shm.h> 44 #include <sys/sem.h> 45 #include <sys/msg.h> 46 #include <sys/proc.h> 47 #include <sys/systm.h> 48 49 #include <sys/mount.h> 50 #include <sys/syscallargs.h> 51 52 #include <compat/linux/common/linux_types.h> 53 #include <compat/linux/common/linux_signal.h> 54 #include <compat/linux/common/linux_util.h> 55 56 #include <compat/linux/linux_syscallargs.h> 57 #include <compat/linux/linux_syscall.h> 58 59 #include <compat/linux/common/linux_ipc.h> 60 #include <compat/linux/common/linux_msg.h> 61 #include <compat/linux/common/linux_shm.h> 62 #include <compat/linux/common/linux_sem.h> 63 #include <compat/linux/common/linux_ipccall.h> 64 65 /* 66 * Note: Not all linux architechtures have explicit versions 67 * of the SYSV* syscalls. On the ones that don't 68 * we pretend that they are defined anyway. *_args and 69 * prototypes are defined in individual headers; 70 * syscalls.master lists those syscalls as NOARGS. 71 * 72 * The functions in multiarch are the ones that just need 73 * the arguments shuffled around and then use the 74 * normal NetBSD syscall. 75 * 76 * Function in multiarch: 77 * linux_sys_ipc : linux_ipccall.c 78 * liunx_semop : linux_ipccall.c 79 * linux_semget : linux_ipccall.c 80 * linux_msgsnd : linux_ipccall.c 81 * linux_msgrcv : linux_ipccall.c 82 * linux_msgget : linux_ipccall.c 83 * linux_shmdt : linux_ipccall.c 84 * linux_shmget : linux_ipccall.c 85 */ 86 87 #if defined (SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) 88 /* 89 * Convert between Linux and NetBSD ipc_perm structures. Only the 90 * order of the fields is different. 91 */ 92 void 93 linux_to_bsd_ipc_perm(lpp, bpp) 94 struct linux_ipc_perm *lpp; 95 struct ipc_perm *bpp; 96 { 97 98 bpp->_key = lpp->l_key; 99 bpp->uid = lpp->l_uid; 100 bpp->gid = lpp->l_gid; 101 bpp->cuid = lpp->l_cuid; 102 bpp->cgid = lpp->l_cgid; 103 bpp->mode = lpp->l_mode; 104 bpp->_seq = lpp->l_seq; 105 } 106 107 void 108 bsd_to_linux_ipc_perm(bpp, lpp) 109 struct ipc_perm *bpp; 110 struct linux_ipc_perm *lpp; 111 { 112 113 lpp->l_key = bpp->_key; 114 lpp->l_uid = bpp->uid; 115 lpp->l_gid = bpp->gid; 116 lpp->l_cuid = bpp->cuid; 117 lpp->l_cgid = bpp->cgid; 118 lpp->l_mode = bpp->mode; 119 lpp->l_seq = bpp->_seq; 120 } 121 #endif 122 123 #ifdef SYSVSEM 124 /* 125 * Semaphore operations. Most constants and structures are the same on 126 * both systems. Only semctl() needs some extra work. 127 */ 128 129 /* 130 * Convert between Linux and NetBSD semid_ds structures. 131 */ 132 void 133 bsd_to_linux_semid_ds(bs, ls) 134 struct semid_ds *bs; 135 struct linux_semid_ds *ls; 136 { 137 138 bsd_to_linux_ipc_perm(&bs->sem_perm, &ls->l_sem_perm); 139 ls->l_sem_otime = bs->sem_otime; 140 ls->l_sem_ctime = bs->sem_ctime; 141 ls->l_sem_nsems = bs->sem_nsems; 142 ls->l_sem_base = bs->_sem_base; 143 } 144 145 void 146 linux_to_bsd_semid_ds(ls, bs) 147 struct linux_semid_ds *ls; 148 struct semid_ds *bs; 149 { 150 151 linux_to_bsd_ipc_perm(&ls->l_sem_perm, &bs->sem_perm); 152 bs->sem_otime = ls->l_sem_otime; 153 bs->sem_ctime = ls->l_sem_ctime; 154 bs->sem_nsems = ls->l_sem_nsems; 155 bs->_sem_base = ls->l_sem_base; 156 } 157 158 /* 159 * Most of this can be handled by directly passing the arguments on; we 160 * just need to frob the `cmd' and convert the semid_ds and semun. 161 */ 162 int 163 linux_sys_semctl(p, v, retval) 164 struct proc *p; 165 void *v; 166 register_t *retval; 167 { 168 struct linux_sys_semctl_args /* { 169 syscallarg(int) semid; 170 syscallarg(int) semnum; 171 syscallarg(int) cmd; 172 syscallarg(union linux_semun) arg; 173 } */ *uap = v; 174 struct semid_ds sembuf; 175 struct linux_semid_ds lsembuf; 176 union __semun semun; 177 int cmd, error; 178 void *pass_arg = NULL; 179 180 cmd = SCARG(uap, cmd); 181 182 switch (cmd) { 183 case LINUX_IPC_SET: 184 pass_arg = &sembuf; 185 cmd = IPC_SET; 186 break; 187 188 case LINUX_IPC_STAT: 189 pass_arg = &sembuf; 190 cmd = IPC_STAT; 191 break; 192 193 case LINUX_IPC_RMID: 194 cmd = IPC_RMID; 195 break; 196 197 case LINUX_GETVAL: 198 cmd = GETVAL; 199 break; 200 201 case LINUX_GETPID: 202 cmd = GETPID; 203 break; 204 205 case LINUX_GETNCNT: 206 cmd = GETNCNT; 207 break; 208 209 case LINUX_GETZCNT: 210 cmd = GETZCNT; 211 break; 212 213 case LINUX_GETALL: 214 pass_arg = &semun; 215 semun.array = SCARG(uap, arg).l_array; 216 cmd = GETALL; 217 break; 218 219 case LINUX_SETVAL: 220 pass_arg = &semun; 221 semun.val = SCARG(uap, arg).l_val; 222 cmd = SETVAL; 223 break; 224 225 case LINUX_SETALL: 226 pass_arg = &semun; 227 semun.array = SCARG(uap, arg).l_array; 228 cmd = SETALL; 229 break; 230 231 default: 232 return (EINVAL); 233 } 234 235 if (cmd == IPC_SET) { 236 error = copyin(SCARG(uap, arg).l_buf, &lsembuf, 237 sizeof(lsembuf)); 238 if (error) 239 return (error); 240 linux_to_bsd_semid_ds(&lsembuf, &sembuf); 241 } 242 243 error = semctl1(p, SCARG(uap, semid), SCARG(uap, semnum), cmd, 244 pass_arg, retval); 245 246 if (error == 0 && cmd == IPC_STAT) { 247 bsd_to_linux_semid_ds(&sembuf, &lsembuf); 248 error = copyout(&lsembuf, SCARG(uap, arg).l_buf, 249 sizeof(lsembuf)); 250 } 251 252 return (error); 253 } 254 #endif /* SYSVSEM */ 255 256 #ifdef SYSVMSG 257 258 void 259 linux_to_bsd_msqid_ds(lmp, bmp) 260 struct linux_msqid_ds *lmp; 261 struct msqid_ds *bmp; 262 { 263 264 linux_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm); 265 bmp->_msg_first = lmp->l_msg_first; 266 bmp->_msg_last = lmp->l_msg_last; 267 bmp->_msg_cbytes = lmp->l_msg_cbytes; 268 bmp->msg_qnum = lmp->l_msg_qnum; 269 bmp->msg_qbytes = lmp->l_msg_qbytes; 270 bmp->msg_lspid = lmp->l_msg_lspid; 271 bmp->msg_lrpid = lmp->l_msg_lrpid; 272 bmp->msg_stime = lmp->l_msg_stime; 273 bmp->msg_rtime = lmp->l_msg_rtime; 274 bmp->msg_ctime = lmp->l_msg_ctime; 275 } 276 277 void 278 bsd_to_linux_msqid_ds(bmp, lmp) 279 struct msqid_ds *bmp; 280 struct linux_msqid_ds *lmp; 281 { 282 283 bsd_to_linux_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm); 284 lmp->l_msg_first = bmp->_msg_first; 285 lmp->l_msg_last = bmp->_msg_last; 286 lmp->l_msg_cbytes = bmp->_msg_cbytes; 287 lmp->l_msg_qnum = bmp->msg_qnum; 288 lmp->l_msg_qbytes = bmp->msg_qbytes; 289 lmp->l_msg_lspid = bmp->msg_lspid; 290 lmp->l_msg_lrpid = bmp->msg_lrpid; 291 lmp->l_msg_stime = bmp->msg_stime; 292 lmp->l_msg_rtime = bmp->msg_rtime; 293 lmp->l_msg_ctime = bmp->msg_ctime; 294 } 295 296 int 297 linux_sys_msgctl(p, v, retval) 298 struct proc *p; 299 void *v; 300 register_t *retval; 301 { 302 struct linux_sys_msgctl_args /* { 303 syscallarg(int) msqid; 304 syscallarg(int) cmd; 305 syscallarg(struct linux_msqid_ds *) buf; 306 } */ *uap = v; 307 caddr_t sg; 308 struct sys___msgctl13_args nua; 309 struct msqid_ds *bmp, bm; 310 struct linux_msqid_ds lm; 311 int error; 312 313 SCARG(&nua, msqid) = SCARG(uap, msqid); 314 switch (SCARG(uap, cmd)) { 315 case LINUX_IPC_STAT: 316 sg = stackgap_init(p->p_emul); 317 bmp = stackgap_alloc(&sg, sizeof (struct msqid_ds)); 318 SCARG(&nua, cmd) = IPC_STAT; 319 SCARG(&nua, buf) = bmp; 320 if ((error = sys___msgctl13(p, &nua, retval))) 321 return error; 322 if ((error = copyin(bmp, &bm, sizeof bm))) 323 return error; 324 bsd_to_linux_msqid_ds(&bm, &lm); 325 return copyout(&lm, SCARG(uap, buf), sizeof lm); 326 case LINUX_IPC_SET: 327 if ((error = copyin(SCARG(uap, buf), &lm, sizeof lm))) 328 return error; 329 linux_to_bsd_msqid_ds(&lm, &bm); 330 sg = stackgap_init(p->p_emul); 331 bmp = stackgap_alloc(&sg, sizeof bm); 332 if ((error = copyout(&bm, bmp, sizeof bm))) 333 return error; 334 SCARG(&nua, cmd) = IPC_SET; 335 SCARG(&nua, buf) = bmp; 336 break; 337 case LINUX_IPC_RMID: 338 SCARG(&nua, cmd) = IPC_RMID; 339 SCARG(&nua, buf) = NULL; 340 break; 341 default: 342 return EINVAL; 343 } 344 return sys___msgctl13(p, &nua, retval); 345 } 346 #endif /* SYSVMSG */ 347 348 #ifdef SYSVSHM 349 /* 350 * shmat(2). Very straightforward, except that Linux passes a pointer 351 * in which the return value is to be passed. This is subsequently 352 * handled by libc, apparently. 353 */ 354 int 355 linux_sys_shmat(p, v, retval) 356 struct proc *p; 357 void *v; 358 register_t *retval; 359 { 360 struct linux_sys_shmat_args /* { 361 syscallarg(int) shmid; 362 syscallarg(void *) shmaddr; 363 syscallarg(int) shmflg; 364 syscallarg(u_long *) raddr; 365 } */ *uap = v; 366 int error; 367 368 if ((error = sys_shmat(p, uap, retval))) 369 return error; 370 371 if ((error = copyout(&retval[0], (caddr_t) SCARG(uap, raddr), 372 sizeof retval[0]))) 373 return error; 374 375 retval[0] = 0; 376 return 0; 377 } 378 379 /* 380 * Convert between Linux and NetBSD shmid_ds structures. 381 * The order of the fields is once again the difference, and 382 * we also need a place to store the internal data pointer 383 * in, which is unfortunately stored in this structure. 384 * 385 * We abuse a Linux internal field for that. 386 */ 387 void 388 linux_to_bsd_shmid_ds(lsp, bsp) 389 struct linux_shmid_ds *lsp; 390 struct shmid_ds *bsp; 391 { 392 393 linux_to_bsd_ipc_perm(&lsp->l_shm_perm, &bsp->shm_perm); 394 bsp->shm_segsz = lsp->l_shm_segsz; 395 bsp->shm_lpid = lsp->l_shm_lpid; 396 bsp->shm_cpid = lsp->l_shm_cpid; 397 bsp->shm_nattch = lsp->l_shm_nattch; 398 bsp->shm_atime = lsp->l_shm_atime; 399 bsp->shm_dtime = lsp->l_shm_dtime; 400 bsp->shm_ctime = lsp->l_shm_ctime; 401 bsp->_shm_internal = lsp->l_private2; /* XXX Oh well. */ 402 } 403 404 void 405 bsd_to_linux_shmid_ds(bsp, lsp) 406 struct shmid_ds *bsp; 407 struct linux_shmid_ds *lsp; 408 { 409 410 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->l_shm_perm); 411 lsp->l_shm_segsz = bsp->shm_segsz; 412 lsp->l_shm_lpid = bsp->shm_lpid; 413 lsp->l_shm_cpid = bsp->shm_cpid; 414 lsp->l_shm_nattch = bsp->shm_nattch; 415 lsp->l_shm_atime = bsp->shm_atime; 416 lsp->l_shm_dtime = bsp->shm_dtime; 417 lsp->l_shm_ctime = bsp->shm_ctime; 418 lsp->l_private2 = bsp->_shm_internal; /* XXX */ 419 } 420 421 /* 422 * shmctl. Not implemented (for now): IPC_INFO, SHM_INFO, SHM_STAT 423 * SHM_LOCK and SHM_UNLOCK are passed on, but currently not implemented 424 * by NetBSD itself. 425 * 426 * The usual structure conversion and massaging is done. 427 */ 428 int 429 linux_sys_shmctl(p, v, retval) 430 struct proc *p; 431 void *v; 432 register_t *retval; 433 { 434 struct linux_sys_shmctl_args /* { 435 syscallarg(int) shmid; 436 syscallarg(int) cmd; 437 syscallarg(struct linux_shmid_ds *) buf; 438 } */ *uap = v; 439 caddr_t sg; 440 struct sys___shmctl13_args nua; 441 struct shmid_ds *bsp, bs; 442 struct linux_shmid_ds ls; 443 int error; 444 445 SCARG(&nua, shmid) = SCARG(uap, shmid); 446 switch (SCARG(uap, cmd)) { 447 case LINUX_IPC_STAT: 448 sg = stackgap_init(p->p_emul); 449 bsp = stackgap_alloc(&sg, sizeof(struct shmid_ds)); 450 SCARG(&nua, cmd) = IPC_STAT; 451 SCARG(&nua, buf) = bsp; 452 if ((error = sys___shmctl13(p, &nua, retval))) 453 return error; 454 if ((error = copyin(SCARG(&nua, buf), &bs, sizeof bs))) 455 return error; 456 bsd_to_linux_shmid_ds(&bs, &ls); 457 return copyout(&ls, SCARG(uap, buf), sizeof ls); 458 case LINUX_IPC_SET: 459 if ((error = copyin(SCARG(uap, buf), &ls, sizeof ls))) 460 return error; 461 linux_to_bsd_shmid_ds(&ls, &bs); 462 sg = stackgap_init(p->p_emul); 463 bsp = stackgap_alloc(&sg, sizeof bs); 464 if ((error = copyout(&bs, bsp, sizeof bs))) 465 return error; 466 SCARG(&nua, cmd) = IPC_SET; 467 SCARG(&nua, buf) = bsp; 468 break; 469 case LINUX_IPC_RMID: 470 SCARG(&nua, cmd) = IPC_RMID; 471 SCARG(&nua, buf) = NULL; 472 break; 473 case LINUX_SHM_LOCK: 474 SCARG(&nua, cmd) = SHM_LOCK; 475 SCARG(&nua, buf) = NULL; 476 break; 477 case LINUX_SHM_UNLOCK: 478 SCARG(&nua, cmd) = SHM_UNLOCK; 479 SCARG(&nua, buf) = NULL; 480 break; 481 case LINUX_IPC_INFO: 482 case LINUX_SHM_STAT: 483 case LINUX_SHM_INFO: 484 default: 485 return EINVAL; 486 } 487 return sys___shmctl13(p, &nua, retval); 488 } 489 #endif /* SYSVSHM */ 490
Indexes created Wed Sep 24 05:09:52 GMT 2025