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/linux_ipc.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1994-1995 Søren Schmidt 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 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 #include <sys/stat.h> 42 43 #include "opt_compat.h" 44 45 #ifdef COMPAT_LINUX32 46 #include <machine/../linux32/linux.h> 47 #include <machine/../linux32/linux32_proto.h> 48 #else 49 #include <machine/../linux/linux.h> 50 #include <machine/../linux/linux_proto.h> 51 #endif 52 #include <compat/linux/linux_ipc.h> 53 #include <compat/linux/linux_ipc64.h> 54 #include <compat/linux/linux_timer.h> 55 #include <compat/linux/linux_util.h> 56 57 /* 58 * old, pre 2.4 kernel 59 */ 60 struct l_ipc_perm { 61 l_key_t key; 62 l_uid16_t uid; 63 l_gid16_t gid; 64 l_uid16_t cuid; 65 l_gid16_t cgid; 66 l_ushort mode; 67 l_ushort seq; 68 }; 69 70 struct l_seminfo { 71 l_int semmap; 72 l_int semmni; 73 l_int semmns; 74 l_int semmnu; 75 l_int semmsl; 76 l_int semopm; 77 l_int semume; 78 l_int semusz; 79 l_int semvmx; 80 l_int semaem; 81 }; 82 83 struct l_shminfo { 84 l_int shmmax; 85 l_int shmmin; 86 l_int shmmni; 87 l_int shmseg; 88 l_int shmall; 89 }; 90 91 struct l_shm_info { 92 l_int used_ids; 93 l_ulong shm_tot; /* total allocated shm */ 94 l_ulong shm_rss; /* total resident shm */ 95 l_ulong shm_swp; /* total swapped shm */ 96 l_ulong swap_attempts; 97 l_ulong swap_successes; 98 }; 99 100 struct l_msginfo { 101 l_int msgpool; 102 l_int msgmap; 103 l_int msgmax; 104 l_int msgmnb; 105 l_int msgmni; 106 l_int msgssz; 107 l_int msgtql; 108 l_ushort msgseg; 109 }; 110 111 static void 112 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo64 *lpp) 113 { 114 115 lpp->shmmax = bpp->shmmax; 116 lpp->shmmin = bpp->shmmin; 117 lpp->shmmni = bpp->shmmni; 118 lpp->shmseg = bpp->shmseg; 119 lpp->shmall = bpp->shmall; 120 } 121 122 static void 123 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp) 124 { 125 126 lpp->used_ids = bpp->used_ids; 127 lpp->shm_tot = bpp->shm_tot; 128 lpp->shm_rss = bpp->shm_rss; 129 lpp->shm_swp = bpp->shm_swp; 130 lpp->swap_attempts = bpp->swap_attempts; 131 lpp->swap_successes = bpp->swap_successes; 132 } 133 134 static void 135 linux_to_bsd_ipc_perm(struct l_ipc64_perm *lpp, struct ipc_perm *bpp) 136 { 137 138 bpp->key = lpp->key; 139 bpp->uid = lpp->uid; 140 bpp->gid = lpp->gid; 141 bpp->cuid = lpp->cuid; 142 bpp->cgid = lpp->cgid; 143 bpp->mode = lpp->mode; 144 bpp->seq = lpp->seq; 145 } 146 147 static void 148 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc64_perm *lpp) 149 { 150 151 lpp->key = bpp->key; 152 lpp->uid = bpp->uid; 153 lpp->gid = bpp->gid; 154 lpp->cuid = bpp->cuid; 155 lpp->cgid = bpp->cgid; 156 lpp->mode = bpp->mode & (S_IRWXU|S_IRWXG|S_IRWXO); 157 lpp->seq = bpp->seq; 158 } 159 160 struct l_msqid_ds { 161 struct l_ipc_perm msg_perm; 162 l_uintptr_t msg_first; /* first message on queue,unused */ 163 l_uintptr_t msg_last; /* last message in queue,unused */ 164 l_time_t msg_stime; /* last msgsnd time */ 165 l_time_t msg_rtime; /* last msgrcv time */ 166 l_time_t msg_ctime; /* last change time */ 167 l_ulong msg_lcbytes; /* Reuse junk fields for 32 bit */ 168 l_ulong msg_lqbytes; /* ditto */ 169 l_ushort msg_cbytes; /* current number of bytes on queue */ 170 l_ushort msg_qnum; /* number of messages in queue */ 171 l_ushort msg_qbytes; /* max number of bytes on queue */ 172 l_pid_t msg_lspid; /* pid of last msgsnd */ 173 l_pid_t msg_lrpid; /* last receive pid */ 174 }; 175 176 struct l_semid_ds { 177 struct l_ipc_perm sem_perm; 178 l_time_t sem_otime; 179 l_time_t sem_ctime; 180 l_uintptr_t sem_base; 181 l_uintptr_t sem_pending; 182 l_uintptr_t sem_pending_last; 183 l_uintptr_t undo; 184 l_ushort sem_nsems; 185 }; 186 187 struct l_shmid_ds { 188 struct l_ipc_perm shm_perm; 189 l_int shm_segsz; 190 l_time_t shm_atime; 191 l_time_t shm_dtime; 192 l_time_t shm_ctime; 193 l_ushort shm_cpid; 194 l_ushort shm_lpid; 195 l_short shm_nattch; 196 l_ushort private1; 197 l_uintptr_t private2; 198 l_uintptr_t private3; 199 }; 200 201 static void 202 linux_to_bsd_semid_ds(struct l_semid64_ds *lsp, struct semid_ds *bsp) 203 { 204 205 linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm); 206 bsp->sem_otime = lsp->sem_otime; 207 bsp->sem_ctime = lsp->sem_ctime; 208 bsp->sem_nsems = lsp->sem_nsems; 209 } 210 211 static void 212 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid64_ds *lsp) 213 { 214 215 bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm); 216 lsp->sem_otime = bsp->sem_otime; 217 lsp->sem_ctime = bsp->sem_ctime; 218 lsp->sem_nsems = bsp->sem_nsems; 219 } 220 221 static void 222 linux_to_bsd_shmid_ds(struct l_shmid64_ds *lsp, struct shmid_ds *bsp) 223 { 224 225 linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm); 226 bsp->shm_segsz = lsp->shm_segsz; 227 bsp->shm_lpid = lsp->shm_lpid; 228 bsp->shm_cpid = lsp->shm_cpid; 229 bsp->shm_nattch = lsp->shm_nattch; 230 bsp->shm_atime = lsp->shm_atime; 231 bsp->shm_dtime = lsp->shm_dtime; 232 bsp->shm_ctime = lsp->shm_ctime; 233 } 234 235 static void 236 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid64_ds *lsp) 237 { 238 239 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm); 240 lsp->shm_segsz = bsp->shm_segsz; 241 lsp->shm_lpid = bsp->shm_lpid; 242 lsp->shm_cpid = bsp->shm_cpid; 243 lsp->shm_nattch = bsp->shm_nattch; 244 lsp->shm_atime = bsp->shm_atime; 245 lsp->shm_dtime = bsp->shm_dtime; 246 lsp->shm_ctime = bsp->shm_ctime; 247 } 248 249 static void 250 linux_to_bsd_msqid_ds(struct l_msqid64_ds *lsp, struct msqid_ds *bsp) 251 { 252 253 linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm); 254 bsp->msg_cbytes = lsp->msg_cbytes; 255 bsp->msg_qnum = lsp->msg_qnum; 256 bsp->msg_qbytes = lsp->msg_qbytes; 257 bsp->msg_lspid = lsp->msg_lspid; 258 bsp->msg_lrpid = lsp->msg_lrpid; 259 bsp->msg_stime = lsp->msg_stime; 260 bsp->msg_rtime = lsp->msg_rtime; 261 bsp->msg_ctime = lsp->msg_ctime; 262 } 263 264 static void 265 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid64_ds *lsp) 266 { 267 268 bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm); 269 lsp->msg_cbytes = bsp->msg_cbytes; 270 lsp->msg_qnum = bsp->msg_qnum; 271 lsp->msg_qbytes = bsp->msg_qbytes; 272 lsp->msg_lspid = bsp->msg_lspid; 273 lsp->msg_lrpid = bsp->msg_lrpid; 274 lsp->msg_stime = bsp->msg_stime; 275 lsp->msg_rtime = bsp->msg_rtime; 276 lsp->msg_ctime = bsp->msg_ctime; 277 } 278 279 static int 280 linux_ipc64_perm_to_ipc_perm(struct l_ipc64_perm *in, struct l_ipc_perm *out) 281 { 282 283 out->key = in->key; 284 out->uid = in->uid; 285 out->gid = in->gid; 286 out->cuid = in->cuid; 287 out->cgid = in->cgid; 288 out->mode = in->mode; 289 out->seq = in->seq; 290 291 /* Linux does not check overflow */ 292 if (out->uid != in->uid || out->gid != in->gid || 293 out->cuid != in->cuid || out->cgid != in->cgid || 294 out->mode != in->mode) 295 return (EOVERFLOW); 296 else 297 return (0); 298 } 299 300 static int 301 linux_msqid_pullup(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr) 302 { 303 struct l_msqid_ds linux_msqid; 304 int error; 305 306 if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64)) 307 return (copyin(uaddr, linux_msqid64, sizeof(*linux_msqid64))); 308 else { 309 error = copyin(uaddr, &linux_msqid, sizeof(linux_msqid)); 310 if (error != 0) 311 return (error); 312 313 bzero(linux_msqid64, sizeof(*linux_msqid64)); 314 315 linux_msqid64->msg_perm.uid = linux_msqid.msg_perm.uid; 316 linux_msqid64->msg_perm.gid = linux_msqid.msg_perm.gid; 317 linux_msqid64->msg_perm.mode = linux_msqid.msg_perm.mode; 318 if (linux_msqid.msg_qbytes == 0) 319 linux_msqid64->msg_qbytes = linux_msqid.msg_lqbytes; 320 else 321 linux_msqid64->msg_qbytes = linux_msqid.msg_qbytes; 322 return (0); 323 } 324 } 325 326 static int 327 linux_msqid_pushdown(l_int ver, struct l_msqid64_ds *linux_msqid64, caddr_t uaddr) 328 { 329 struct l_msqid_ds linux_msqid; 330 int error; 331 332 if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64)) 333 return (copyout(linux_msqid64, uaddr, sizeof(*linux_msqid64))); 334 else { 335 bzero(&linux_msqid, sizeof(linux_msqid)); 336 337 error = linux_ipc64_perm_to_ipc_perm(&linux_msqid64->msg_perm, 338 &linux_msqid.msg_perm); 339 if (error != 0) 340 return (error); 341 342 linux_msqid.msg_stime = linux_msqid64->msg_stime; 343 linux_msqid.msg_rtime = linux_msqid64->msg_rtime; 344 linux_msqid.msg_ctime = linux_msqid64->msg_ctime; 345 346 if (linux_msqid64->msg_cbytes > USHRT_MAX) 347 linux_msqid.msg_cbytes = USHRT_MAX; 348 else 349 linux_msqid.msg_cbytes = linux_msqid64->msg_cbytes; 350 linux_msqid.msg_lcbytes = linux_msqid64->msg_cbytes; 351 if (linux_msqid64->msg_qnum > USHRT_MAX) 352 linux_msqid.msg_qnum = USHRT_MAX; 353 else 354 linux_msqid.msg_qnum = linux_msqid64->msg_qnum; 355 if (linux_msqid64->msg_qbytes > USHRT_MAX) 356 linux_msqid.msg_qbytes = USHRT_MAX; 357 else 358 linux_msqid.msg_qbytes = linux_msqid64->msg_qbytes; 359 linux_msqid.msg_lqbytes = linux_msqid64->msg_qbytes; 360 linux_msqid.msg_lspid = linux_msqid64->msg_lspid; 361 linux_msqid.msg_lrpid = linux_msqid64->msg_lrpid; 362 363 /* Linux does not check overflow */ 364 if (linux_msqid.msg_stime != linux_msqid64->msg_stime || 365 linux_msqid.msg_rtime != linux_msqid64->msg_rtime || 366 linux_msqid.msg_ctime != linux_msqid64->msg_ctime) 367 return (EOVERFLOW); 368 369 return (copyout(&linux_msqid, uaddr, sizeof(linux_msqid))); 370 } 371 } 372 373 static int 374 linux_semid_pullup(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr) 375 { 376 struct l_semid_ds linux_semid; 377 int error; 378 379 if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64)) 380 return (copyin(uaddr, linux_semid64, sizeof(*linux_semid64))); 381 else { 382 error = copyin(uaddr, &linux_semid, sizeof(linux_semid)); 383 if (error != 0) 384 return (error); 385 386 bzero(linux_semid64, sizeof(*linux_semid64)); 387 388 linux_semid64->sem_perm.uid = linux_semid.sem_perm.uid; 389 linux_semid64->sem_perm.gid = linux_semid.sem_perm.gid; 390 linux_semid64->sem_perm.mode = linux_semid.sem_perm.mode; 391 return (0); 392 } 393 } 394 395 static int 396 linux_semid_pushdown(l_int ver, struct l_semid64_ds *linux_semid64, caddr_t uaddr) 397 { 398 struct l_semid_ds linux_semid; 399 int error; 400 401 if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64)) 402 return (copyout(linux_semid64, uaddr, sizeof(*linux_semid64))); 403 else { 404 bzero(&linux_semid, sizeof(linux_semid)); 405 406 error = linux_ipc64_perm_to_ipc_perm(&linux_semid64->sem_perm, 407 &linux_semid.sem_perm); 408 if (error != 0) 409 return (error); 410 411 linux_semid.sem_otime = linux_semid64->sem_otime; 412 linux_semid.sem_ctime = linux_semid64->sem_ctime; 413 linux_semid.sem_nsems = linux_semid64->sem_nsems; 414 415 /* Linux does not check overflow */ 416 if (linux_semid.sem_otime != linux_semid64->sem_otime || 417 linux_semid.sem_ctime != linux_semid64->sem_ctime || 418 linux_semid.sem_nsems != linux_semid64->sem_nsems) 419 return (EOVERFLOW); 420 421 return (copyout(&linux_semid, uaddr, sizeof(linux_semid))); 422 } 423 } 424 425 static int 426 linux_shmid_pullup(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr) 427 { 428 struct l_shmid_ds linux_shmid; 429 int error; 430 431 if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64)) 432 return (copyin(uaddr, linux_shmid64, sizeof(*linux_shmid64))); 433 else { 434 error = copyin(uaddr, &linux_shmid, sizeof(linux_shmid)); 435 if (error != 0) 436 return (error); 437 438 bzero(linux_shmid64, sizeof(*linux_shmid64)); 439 440 linux_shmid64->shm_perm.uid = linux_shmid.shm_perm.uid; 441 linux_shmid64->shm_perm.gid = linux_shmid.shm_perm.gid; 442 linux_shmid64->shm_perm.mode = linux_shmid.shm_perm.mode; 443 return (0); 444 } 445 } 446 447 static int 448 linux_shmid_pushdown(l_int ver, struct l_shmid64_ds *linux_shmid64, caddr_t uaddr) 449 { 450 struct l_shmid_ds linux_shmid; 451 int error; 452 453 if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64)) 454 return (copyout(linux_shmid64, uaddr, sizeof(*linux_shmid64))); 455 else { 456 bzero(&linux_shmid, sizeof(linux_shmid)); 457 458 error = linux_ipc64_perm_to_ipc_perm(&linux_shmid64->shm_perm, 459 &linux_shmid.shm_perm); 460 if (error != 0) 461 return (error); 462 463 linux_shmid.shm_segsz = linux_shmid64->shm_segsz; 464 linux_shmid.shm_atime = linux_shmid64->shm_atime; 465 linux_shmid.shm_dtime = linux_shmid64->shm_dtime; 466 linux_shmid.shm_ctime = linux_shmid64->shm_ctime; 467 linux_shmid.shm_cpid = linux_shmid64->shm_cpid; 468 linux_shmid.shm_lpid = linux_shmid64->shm_lpid; 469 linux_shmid.shm_nattch = linux_shmid64->shm_nattch; 470 471 /* Linux does not check overflow */ 472 if (linux_shmid.shm_segsz != linux_shmid64->shm_segsz || 473 linux_shmid.shm_atime != linux_shmid64->shm_atime || 474 linux_shmid.shm_dtime != linux_shmid64->shm_dtime || 475 linux_shmid.shm_ctime != linux_shmid64->shm_ctime || 476 linux_shmid.shm_cpid != linux_shmid64->shm_cpid || 477 linux_shmid.shm_lpid != linux_shmid64->shm_lpid || 478 linux_shmid.shm_nattch != linux_shmid64->shm_nattch) 479 return (EOVERFLOW); 480 481 return (copyout(&linux_shmid, uaddr, sizeof(linux_shmid))); 482 } 483 } 484 485 static int 486 linux_shminfo_pushdown(l_int ver, struct l_shminfo64 *linux_shminfo64, 487 caddr_t uaddr) 488 { 489 struct l_shminfo linux_shminfo; 490 491 if (ver == LINUX_IPC_64 || SV_CURPROC_FLAG(SV_LP64)) 492 return (copyout(linux_shminfo64, uaddr, 493 sizeof(*linux_shminfo64))); 494 else { 495 bzero(&linux_shminfo, sizeof(linux_shminfo)); 496 497 linux_shminfo.shmmax = linux_shminfo64->shmmax; 498 linux_shminfo.shmmin = linux_shminfo64->shmmin; 499 linux_shminfo.shmmni = linux_shminfo64->shmmni; 500 linux_shminfo.shmseg = linux_shminfo64->shmseg; 501 linux_shminfo.shmall = linux_shminfo64->shmall; 502 503 return (copyout(&linux_shminfo, uaddr, 504 sizeof(linux_shminfo))); 505 } 506 } 507 508 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 509 int 510 linux_semtimedop_time64(struct thread *td, struct linux_semtimedop_time64_args *args) 511 { 512 struct timespec ts, *tsa; 513 int error; 514 515 if (args->timeout) { 516 error = linux_get_timespec64(&ts, args->timeout); 517 if (error != 0) 518 return (error); 519 tsa = &ts; 520 } else 521 tsa = NULL; 522 523 return (kern_semop(td, args->semid, PTRIN(args->tsops), 524 args->nsops, tsa)); 525 } 526 #endif /* __i386__) || (__amd64__ && COMPAT_LINUX32) */ 527 528 int 529 linux_semtimedop(struct thread *td, struct linux_semtimedop_args *args) 530 { 531 struct timespec ts, *tsa; 532 int error; 533 534 if (args->timeout) { 535 error = linux_get_timespec(&ts, args->timeout); 536 if (error != 0) 537 return (error); 538 tsa = &ts; 539 } else 540 tsa = NULL; 541 542 return (kern_semop(td, args->semid, PTRIN(args->tsops), 543 args->nsops, tsa)); 544 } 545 546 int 547 linux_semget(struct thread *td, struct linux_semget_args *args) 548 { 549 struct semget_args /* { 550 key_t key; 551 int nsems; 552 int semflg; 553 } */ bsd_args; 554 555 if (args->nsems < 0) 556 return (EINVAL); 557 bsd_args.key = args->key; 558 bsd_args.nsems = args->nsems; 559 bsd_args.semflg = args->semflg; 560 return (sys_semget(td, &bsd_args)); 561 } 562 563 int 564 linux_semctl(struct thread *td, struct linux_semctl_args *args) 565 { 566 struct l_semid64_ds linux_semid64; 567 struct l_seminfo linux_seminfo; 568 struct semid_ds semid; 569 union semun semun; 570 register_t rval; 571 int cmd, error; 572 573 memset(&linux_seminfo, 0, sizeof(linux_seminfo)); 574 memset(&linux_semid64, 0, sizeof(linux_semid64)); 575 576 switch (args->cmd & ~LINUX_IPC_64) { 577 case LINUX_IPC_RMID: 578 cmd = IPC_RMID; 579 break; 580 case LINUX_GETNCNT: 581 cmd = GETNCNT; 582 break; 583 case LINUX_GETPID: 584 cmd = GETPID; 585 break; 586 case LINUX_GETVAL: 587 cmd = GETVAL; 588 break; 589 case LINUX_GETZCNT: 590 cmd = GETZCNT; 591 break; 592 case LINUX_SETVAL: 593 cmd = SETVAL; 594 semun.val = args->arg.val; 595 break; 596 case LINUX_IPC_SET: 597 cmd = IPC_SET; 598 error = linux_semid_pullup(args->cmd & LINUX_IPC_64, 599 &linux_semid64, PTRIN(args->arg.buf)); 600 if (error != 0) 601 return (error); 602 linux_to_bsd_semid_ds(&linux_semid64, &semid); 603 semun.buf = &semid; 604 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun, 605 td->td_retval)); 606 case LINUX_IPC_STAT: 607 cmd = IPC_STAT; 608 semun.buf = &semid; 609 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun, 610 &rval); 611 if (error != 0) 612 return (error); 613 bsd_to_linux_semid_ds(&semid, &linux_semid64); 614 return (linux_semid_pushdown(args->cmd & LINUX_IPC_64, 615 &linux_semid64, PTRIN(args->arg.buf))); 616 case LINUX_SEM_STAT: 617 cmd = SEM_STAT; 618 semun.buf = &semid; 619 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun, 620 &rval); 621 if (error != 0) 622 return (error); 623 bsd_to_linux_semid_ds(&semid, &linux_semid64); 624 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64, 625 &linux_semid64, PTRIN(args->arg.buf)); 626 if (error == 0) 627 td->td_retval[0] = rval; 628 return (error); 629 case LINUX_IPC_INFO: 630 case LINUX_SEM_INFO: 631 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) - 632 sizeof(linux_seminfo.semmap) ); 633 /* 634 * Linux does not use the semmap field but populates it with 635 * the defined value from SEMMAP, which really is redefined to 636 * SEMMNS, which they define as SEMMNI * SEMMSL. Try to 637 * simulate this returning our dynamic semmns value. 638 */ 639 linux_seminfo.semmap = linux_seminfo.semmns; 640 /* XXX BSD equivalent? 641 #define used_semids 10 642 #define used_sems 10 643 linux_seminfo.semusz = used_semids; 644 linux_seminfo.semaem = used_sems; 645 */ 646 error = copyout(&linux_seminfo, 647 PTRIN(args->arg.buf), sizeof(linux_seminfo)); 648 if (error != 0) 649 return (error); 650 /* 651 * TODO: Linux return the last assigned id, not the semmni. 652 */ 653 td->td_retval[0] = seminfo.semmni; 654 return (0); 655 case LINUX_GETALL: 656 cmd = GETALL; 657 semun.array = PTRIN(args->arg.array); 658 break; 659 case LINUX_SETALL: 660 cmd = SETALL; 661 semun.array = PTRIN(args->arg.array); 662 break; 663 default: 664 linux_msg(td, "ipc type %d is not implemented", 665 args->cmd & ~LINUX_IPC_64); 666 return (EINVAL); 667 } 668 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun, 669 td->td_retval)); 670 } 671 672 int 673 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args) 674 { 675 const void *msgp; 676 long mtype; 677 l_long lmtype; 678 int error; 679 680 if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax) 681 return (EINVAL); 682 msgp = PTRIN(args->msgp); 683 if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0) 684 return (error); 685 mtype = (long)lmtype; 686 return (kern_msgsnd(td, args->msqid, 687 (const char *)msgp + sizeof(lmtype), 688 args->msgsz, args->msgflg, mtype)); 689 } 690 691 int 692 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args) 693 { 694 void *msgp; 695 long mtype; 696 l_long lmtype; 697 int error; 698 699 if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax) 700 return (EINVAL); 701 msgp = PTRIN(args->msgp); 702 if ((error = kern_msgrcv(td, args->msqid, 703 (char *)msgp + sizeof(lmtype), args->msgsz, 704 args->msgtyp, args->msgflg, &mtype)) != 0) 705 return (error); 706 lmtype = (l_long)mtype; 707 return (copyout(&lmtype, msgp, sizeof(lmtype))); 708 } 709 710 int 711 linux_msgget(struct thread *td, struct linux_msgget_args *args) 712 { 713 struct msgget_args /* { 714 key_t key; 715 int msgflg; 716 } */ bsd_args; 717 718 bsd_args.key = args->key; 719 bsd_args.msgflg = args->msgflg; 720 return (sys_msgget(td, &bsd_args)); 721 } 722 723 int 724 linux_msgctl(struct thread *td, struct linux_msgctl_args *args) 725 { 726 int error, bsd_cmd; 727 struct l_msqid64_ds linux_msqid64; 728 struct msqid_ds bsd_msqid; 729 730 memset(&linux_msqid64, 0, sizeof(linux_msqid64)); 731 732 bsd_cmd = args->cmd & ~LINUX_IPC_64; 733 switch (bsd_cmd) { 734 case LINUX_IPC_INFO: 735 case LINUX_MSG_INFO: { 736 struct l_msginfo linux_msginfo; 737 738 memset(&linux_msginfo, 0, sizeof(linux_msginfo)); 739 /* 740 * XXX MSG_INFO uses the same data structure but returns different 741 * dynamic counters in msgpool, msgmap, and msgtql fields. 742 */ 743 linux_msginfo.msgpool = (long)msginfo.msgmni * 744 (long)msginfo.msgmnb / 1024L; /* XXX MSG_INFO. */ 745 linux_msginfo.msgmap = msginfo.msgmnb; /* XXX MSG_INFO. */ 746 linux_msginfo.msgmax = msginfo.msgmax; 747 linux_msginfo.msgmnb = msginfo.msgmnb; 748 linux_msginfo.msgmni = msginfo.msgmni; 749 linux_msginfo.msgssz = msginfo.msgssz; 750 linux_msginfo.msgtql = msginfo.msgtql; /* XXX MSG_INFO. */ 751 linux_msginfo.msgseg = msginfo.msgseg; 752 error = copyout(&linux_msginfo, PTRIN(args->buf), 753 sizeof(linux_msginfo)); 754 if (error == 0) 755 td->td_retval[0] = msginfo.msgmni; /* XXX */ 756 757 return (error); 758 } 759 760 /* 761 * TODO: implement this 762 * case LINUX_MSG_STAT: 763 */ 764 case LINUX_IPC_STAT: 765 /* NOTHING */ 766 break; 767 768 case LINUX_IPC_SET: 769 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64, 770 &linux_msqid64, PTRIN(args->buf)); 771 if (error != 0) 772 return (error); 773 linux_to_bsd_msqid_ds(&linux_msqid64, &bsd_msqid); 774 break; 775 776 case LINUX_IPC_RMID: 777 /* NOTHING */ 778 break; 779 780 default: 781 return (EINVAL); 782 break; 783 } 784 785 error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid); 786 if (error != 0) { 787 if (bsd_cmd == LINUX_IPC_RMID && error == EACCES) 788 return (EPERM); 789 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL) 790 return (error); 791 } 792 793 if (bsd_cmd == LINUX_IPC_STAT) { 794 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid64); 795 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64, 796 &linux_msqid64, PTRIN(args->buf))); 797 } 798 799 return (0); 800 } 801 802 int 803 linux_shmat(struct thread *td, struct linux_shmat_args *args) 804 { 805 struct shmat_args /* { 806 int shmid; 807 void *shmaddr; 808 int shmflg; 809 } */ bsd_args; 810 811 bsd_args.shmid = args->shmid; 812 bsd_args.shmaddr = PTRIN(args->shmaddr); 813 bsd_args.shmflg = args->shmflg; 814 return (sys_shmat(td, &bsd_args)); 815 } 816 817 int 818 linux_shmdt(struct thread *td, struct linux_shmdt_args *args) 819 { 820 struct shmdt_args /* { 821 void *shmaddr; 822 } */ bsd_args; 823 824 bsd_args.shmaddr = PTRIN(args->shmaddr); 825 return (sys_shmdt(td, &bsd_args)); 826 } 827 828 int 829 linux_shmget(struct thread *td, struct linux_shmget_args *args) 830 { 831 struct shmget_args /* { 832 key_t key; 833 int size; 834 int shmflg; 835 } */ bsd_args; 836 837 bsd_args.key = args->key; 838 bsd_args.size = args->size; 839 bsd_args.shmflg = args->shmflg; 840 return (sys_shmget(td, &bsd_args)); 841 } 842 843 int 844 linux_shmctl(struct thread *td, struct linux_shmctl_args *args) 845 { 846 struct l_shmid64_ds linux_shmid64; 847 struct l_shminfo64 linux_shminfo64; 848 struct l_shm_info linux_shm_info; 849 struct shmid_ds bsd_shmid; 850 int error; 851 852 memset(&linux_shm_info, 0, sizeof(linux_shm_info)); 853 memset(&linux_shmid64, 0, sizeof(linux_shmid64)); 854 memset(&linux_shminfo64, 0, sizeof(linux_shminfo64)); 855 856 switch (args->cmd & ~LINUX_IPC_64) { 857 case LINUX_IPC_INFO: { 858 struct shminfo bsd_shminfo; 859 860 /* Perform shmctl wanting removed segments lookup */ 861 error = kern_shmctl(td, args->shmid, IPC_INFO, 862 (void *)&bsd_shminfo, NULL); 863 if (error != 0) 864 return (error); 865 866 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo64); 867 868 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64, 869 &linux_shminfo64, PTRIN(args->buf))); 870 } 871 872 case LINUX_SHM_INFO: { 873 struct shm_info bsd_shm_info; 874 875 /* Perform shmctl wanting removed segments lookup */ 876 error = kern_shmctl(td, args->shmid, SHM_INFO, 877 (void *)&bsd_shm_info, NULL); 878 if (error != 0) 879 return (error); 880 881 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info); 882 883 return (copyout(&linux_shm_info, PTRIN(args->buf), 884 sizeof(struct l_shm_info))); 885 } 886 887 case LINUX_IPC_STAT: 888 /* Perform shmctl wanting removed segments lookup */ 889 error = kern_shmctl(td, args->shmid, IPC_STAT, 890 (void *)&bsd_shmid, NULL); 891 if (error != 0) 892 return (error); 893 894 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64); 895 896 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64, 897 &linux_shmid64, PTRIN(args->buf))); 898 899 case LINUX_SHM_STAT: 900 /* Perform shmctl wanting removed segments lookup */ 901 error = kern_shmctl(td, args->shmid, IPC_STAT, 902 (void *)&bsd_shmid, NULL); 903 if (error != 0) 904 return (error); 905 906 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid64); 907 908 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64, 909 &linux_shmid64, PTRIN(args->buf))); 910 911 case LINUX_IPC_SET: 912 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64, 913 &linux_shmid64, PTRIN(args->buf)); 914 if (error != 0) 915 return (error); 916 917 linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid); 918 919 /* Perform shmctl wanting removed segments lookup */ 920 return (kern_shmctl(td, args->shmid, IPC_SET, 921 (void *)&bsd_shmid, NULL)); 922 923 case LINUX_IPC_RMID: { 924 void *buf; 925 926 if (args->buf == 0) 927 buf = NULL; 928 else { 929 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64, 930 &linux_shmid64, PTRIN(args->buf)); 931 if (error != 0) 932 return (error); 933 linux_to_bsd_shmid_ds(&linux_shmid64, &bsd_shmid); 934 buf = (void *)&bsd_shmid; 935 } 936 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL)); 937 } 938 939 case LINUX_SHM_LOCK: 940 /* FALLTHROUGH */ 941 case LINUX_SHM_UNLOCK: 942 /* FALLTHROUGH */ 943 default: 944 linux_msg(td, "ipc type %d not implemented", 945 args->cmd & ~LINUX_IPC_64); 946 return (EINVAL); 947 } 948 } 949 950 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1); 951 MODULE_DEPEND(linux, sysvsem, 1, 1, 1); 952 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);
Cache object: db5e70f1186d119b9db5e2eeb0b01797
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