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 * Copyright (c) 1994-1995 Søren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 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 42 #include "opt_compat.h" 43 44 #ifdef COMPAT_LINUX32 45 #include <machine/../linux32/linux.h> 46 #include <machine/../linux32/linux32_proto.h> 47 #include <machine/../linux32/linux32_ipc64.h> 48 #else 49 #include <machine/../linux/linux.h> 50 #include <machine/../linux/linux_proto.h> 51 #include <machine/../linux/linux_ipc64.h> 52 #endif 53 #include <compat/linux/linux_ipc.h> 54 #include <compat/linux/linux_util.h> 55 56 struct l_seminfo { 57 l_int semmap; 58 l_int semmni; 59 l_int semmns; 60 l_int semmnu; 61 l_int semmsl; 62 l_int semopm; 63 l_int semume; 64 l_int semusz; 65 l_int semvmx; 66 l_int semaem; 67 }; 68 69 struct l_shminfo { 70 l_int shmmax; 71 l_int shmmin; 72 l_int shmmni; 73 l_int shmseg; 74 l_int shmall; 75 }; 76 77 struct l_shm_info { 78 l_int used_ids; 79 l_ulong shm_tot; /* total allocated shm */ 80 l_ulong shm_rss; /* total resident shm */ 81 l_ulong shm_swp; /* total swapped shm */ 82 l_ulong swap_attempts; 83 l_ulong swap_successes; 84 }; 85 86 struct l_msginfo { 87 l_int msgpool; 88 l_int msgmap; 89 l_int msgmax; 90 l_int msgmnb; 91 l_int msgmni; 92 l_int msgssz; 93 l_int msgtql; 94 l_ushort msgseg; 95 }; 96 97 static void 98 bsd_to_linux_shminfo( struct shminfo *bpp, struct l_shminfo *lpp) 99 { 100 101 lpp->shmmax = bpp->shmmax; 102 lpp->shmmin = bpp->shmmin; 103 lpp->shmmni = bpp->shmmni; 104 lpp->shmseg = bpp->shmseg; 105 lpp->shmall = bpp->shmall; 106 } 107 108 static void 109 bsd_to_linux_shm_info( struct shm_info *bpp, struct l_shm_info *lpp) 110 { 111 112 lpp->used_ids = bpp->used_ids ; 113 lpp->shm_tot = bpp->shm_tot ; 114 lpp->shm_rss = bpp->shm_rss ; 115 lpp->shm_swp = bpp->shm_swp ; 116 lpp->swap_attempts = bpp->swap_attempts ; 117 lpp->swap_successes = bpp->swap_successes ; 118 } 119 120 static void 121 linux_to_bsd_ipc_perm(struct l_ipc_perm *lpp, struct ipc_perm *bpp) 122 { 123 124 bpp->key = lpp->key; 125 bpp->uid = lpp->uid; 126 bpp->gid = lpp->gid; 127 bpp->cuid = lpp->cuid; 128 bpp->cgid = lpp->cgid; 129 bpp->mode = lpp->mode; 130 bpp->seq = lpp->seq; 131 } 132 133 134 static void 135 bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct l_ipc_perm *lpp) 136 { 137 138 lpp->key = bpp->key; 139 lpp->uid = bpp->uid; 140 lpp->gid = bpp->gid; 141 lpp->cuid = bpp->cuid; 142 lpp->cgid = bpp->cgid; 143 lpp->mode = bpp->mode; 144 lpp->seq = bpp->seq; 145 } 146 147 struct l_msqid_ds { 148 struct l_ipc_perm msg_perm; 149 l_uintptr_t msg_first; /* first message on queue,unused */ 150 l_uintptr_t msg_last; /* last message in queue,unused */ 151 l_time_t msg_stime; /* last msgsnd time */ 152 l_time_t msg_rtime; /* last msgrcv time */ 153 l_time_t msg_ctime; /* last change time */ 154 l_ulong msg_lcbytes; /* Reuse junk fields for 32 bit */ 155 l_ulong msg_lqbytes; /* ditto */ 156 l_ushort msg_cbytes; /* current number of bytes on queue */ 157 l_ushort msg_qnum; /* number of messages in queue */ 158 l_ushort msg_qbytes; /* max number of bytes on queue */ 159 l_pid_t msg_lspid; /* pid of last msgsnd */ 160 l_pid_t msg_lrpid; /* last receive pid */ 161 } 162 #if defined(__amd64__) && defined(COMPAT_LINUX32) 163 __packed 164 #endif 165 ; 166 167 struct l_semid_ds { 168 struct l_ipc_perm sem_perm; 169 l_time_t sem_otime; 170 l_time_t sem_ctime; 171 l_uintptr_t sem_base; 172 l_uintptr_t sem_pending; 173 l_uintptr_t sem_pending_last; 174 l_uintptr_t undo; 175 l_ushort sem_nsems; 176 } 177 #if defined(__amd64__) && defined(COMPAT_LINUX32) 178 __packed 179 #endif 180 ; 181 182 struct l_shmid_ds { 183 struct l_ipc_perm shm_perm; 184 l_int shm_segsz; 185 l_time_t shm_atime; 186 l_time_t shm_dtime; 187 l_time_t shm_ctime; 188 l_ushort shm_cpid; 189 l_ushort shm_lpid; 190 l_short shm_nattch; 191 l_ushort private1; 192 l_uintptr_t private2; 193 l_uintptr_t private3; 194 }; 195 196 static void 197 linux_to_bsd_semid_ds(struct l_semid_ds *lsp, struct semid_ds *bsp) 198 { 199 200 linux_to_bsd_ipc_perm(&lsp->sem_perm, &bsp->sem_perm); 201 bsp->sem_otime = lsp->sem_otime; 202 bsp->sem_ctime = lsp->sem_ctime; 203 bsp->sem_nsems = lsp->sem_nsems; 204 bsp->sem_base = PTRIN(lsp->sem_base); 205 } 206 207 static void 208 bsd_to_linux_semid_ds(struct semid_ds *bsp, struct l_semid_ds *lsp) 209 { 210 211 bsd_to_linux_ipc_perm(&bsp->sem_perm, &lsp->sem_perm); 212 lsp->sem_otime = bsp->sem_otime; 213 lsp->sem_ctime = bsp->sem_ctime; 214 lsp->sem_nsems = bsp->sem_nsems; 215 lsp->sem_base = PTROUT(bsp->sem_base); 216 } 217 218 static void 219 linux_to_bsd_shmid_ds(struct l_shmid_ds *lsp, struct shmid_ds *bsp) 220 { 221 222 linux_to_bsd_ipc_perm(&lsp->shm_perm, &bsp->shm_perm); 223 bsp->shm_segsz = lsp->shm_segsz; 224 bsp->shm_lpid = lsp->shm_lpid; 225 bsp->shm_cpid = lsp->shm_cpid; 226 bsp->shm_nattch = lsp->shm_nattch; 227 bsp->shm_atime = lsp->shm_atime; 228 bsp->shm_dtime = lsp->shm_dtime; 229 bsp->shm_ctime = lsp->shm_ctime; 230 } 231 232 static void 233 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct l_shmid_ds *lsp) 234 { 235 236 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->shm_perm); 237 if (bsp->shm_segsz > INT_MAX) 238 lsp->shm_segsz = INT_MAX; 239 else 240 lsp->shm_segsz = bsp->shm_segsz; 241 lsp->shm_lpid = bsp->shm_lpid; 242 lsp->shm_cpid = bsp->shm_cpid; 243 if (bsp->shm_nattch > SHRT_MAX) 244 lsp->shm_nattch = SHRT_MAX; 245 else 246 lsp->shm_nattch = bsp->shm_nattch; 247 lsp->shm_atime = bsp->shm_atime; 248 lsp->shm_dtime = bsp->shm_dtime; 249 lsp->shm_ctime = bsp->shm_ctime; 250 lsp->private3 = 0; 251 } 252 253 static void 254 linux_to_bsd_msqid_ds(struct l_msqid_ds *lsp, struct msqid_ds *bsp) 255 { 256 257 linux_to_bsd_ipc_perm(&lsp->msg_perm, &bsp->msg_perm); 258 bsp->msg_cbytes = lsp->msg_cbytes; 259 bsp->msg_qnum = lsp->msg_qnum; 260 bsp->msg_qbytes = lsp->msg_qbytes; 261 bsp->msg_lspid = lsp->msg_lspid; 262 bsp->msg_lrpid = lsp->msg_lrpid; 263 bsp->msg_stime = lsp->msg_stime; 264 bsp->msg_rtime = lsp->msg_rtime; 265 bsp->msg_ctime = lsp->msg_ctime; 266 } 267 268 static void 269 bsd_to_linux_msqid_ds(struct msqid_ds *bsp, struct l_msqid_ds *lsp) 270 { 271 272 bsd_to_linux_ipc_perm(&bsp->msg_perm, &lsp->msg_perm); 273 lsp->msg_cbytes = bsp->msg_cbytes; 274 lsp->msg_qnum = bsp->msg_qnum; 275 lsp->msg_qbytes = bsp->msg_qbytes; 276 lsp->msg_lspid = bsp->msg_lspid; 277 lsp->msg_lrpid = bsp->msg_lrpid; 278 lsp->msg_stime = bsp->msg_stime; 279 lsp->msg_rtime = bsp->msg_rtime; 280 lsp->msg_ctime = bsp->msg_ctime; 281 } 282 283 static void 284 linux_ipc_perm_to_ipc64_perm(struct l_ipc_perm *in, struct l_ipc64_perm *out) 285 { 286 287 /* XXX: do we really need to do something here? */ 288 out->key = in->key; 289 out->uid = in->uid; 290 out->gid = in->gid; 291 out->cuid = in->cuid; 292 out->cgid = in->cgid; 293 out->mode = in->mode; 294 out->seq = in->seq; 295 } 296 297 static int 298 linux_msqid_pullup(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr) 299 { 300 struct l_msqid64_ds linux_msqid64; 301 int error; 302 303 if (ver == LINUX_IPC_64) { 304 error = copyin(uaddr, &linux_msqid64, sizeof(linux_msqid64)); 305 if (error != 0) 306 return (error); 307 308 bzero(linux_msqid, sizeof(*linux_msqid)); 309 310 linux_msqid->msg_perm.uid = linux_msqid64.msg_perm.uid; 311 linux_msqid->msg_perm.gid = linux_msqid64.msg_perm.gid; 312 linux_msqid->msg_perm.mode = linux_msqid64.msg_perm.mode; 313 314 if (linux_msqid64.msg_qbytes > USHRT_MAX) 315 linux_msqid->msg_lqbytes = linux_msqid64.msg_qbytes; 316 else 317 linux_msqid->msg_qbytes = linux_msqid64.msg_qbytes; 318 } else 319 error = copyin(uaddr, linux_msqid, sizeof(*linux_msqid)); 320 321 return (error); 322 } 323 324 static int 325 linux_msqid_pushdown(l_int ver, struct l_msqid_ds *linux_msqid, caddr_t uaddr) 326 { 327 struct l_msqid64_ds linux_msqid64; 328 329 if (ver == LINUX_IPC_64) { 330 bzero(&linux_msqid64, sizeof(linux_msqid64)); 331 332 linux_ipc_perm_to_ipc64_perm(&linux_msqid->msg_perm, 333 &linux_msqid64.msg_perm); 334 335 linux_msqid64.msg_stime = linux_msqid->msg_stime; 336 linux_msqid64.msg_rtime = linux_msqid->msg_rtime; 337 linux_msqid64.msg_ctime = linux_msqid->msg_ctime; 338 339 if (linux_msqid->msg_cbytes == 0) 340 linux_msqid64.msg_cbytes = linux_msqid->msg_lcbytes; 341 else 342 linux_msqid64.msg_cbytes = linux_msqid->msg_cbytes; 343 344 linux_msqid64.msg_qnum = linux_msqid->msg_qnum; 345 346 if (linux_msqid->msg_qbytes == 0) 347 linux_msqid64.msg_qbytes = linux_msqid->msg_lqbytes; 348 else 349 linux_msqid64.msg_qbytes = linux_msqid->msg_qbytes; 350 351 linux_msqid64.msg_lspid = linux_msqid->msg_lspid; 352 linux_msqid64.msg_lrpid = linux_msqid->msg_lrpid; 353 354 return (copyout(&linux_msqid64, uaddr, sizeof(linux_msqid64))); 355 } else 356 return (copyout(linux_msqid, uaddr, sizeof(*linux_msqid))); 357 } 358 359 static int 360 linux_semid_pullup(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr) 361 { 362 struct l_semid64_ds linux_semid64; 363 int error; 364 365 if (ver == LINUX_IPC_64) { 366 error = copyin(uaddr, &linux_semid64, sizeof(linux_semid64)); 367 if (error != 0) 368 return (error); 369 370 bzero(linux_semid, sizeof(*linux_semid)); 371 372 linux_semid->sem_perm.uid = linux_semid64.sem_perm.uid; 373 linux_semid->sem_perm.gid = linux_semid64.sem_perm.gid; 374 linux_semid->sem_perm.mode = linux_semid64.sem_perm.mode; 375 } else 376 error = copyin(uaddr, linux_semid, sizeof(*linux_semid)); 377 378 return (error); 379 } 380 381 static int 382 linux_semid_pushdown(l_int ver, struct l_semid_ds *linux_semid, caddr_t uaddr) 383 { 384 struct l_semid64_ds linux_semid64; 385 386 if (ver == LINUX_IPC_64) { 387 bzero(&linux_semid64, sizeof(linux_semid64)); 388 389 linux_ipc_perm_to_ipc64_perm(&linux_semid->sem_perm, 390 &linux_semid64.sem_perm); 391 392 linux_semid64.sem_otime = linux_semid->sem_otime; 393 linux_semid64.sem_ctime = linux_semid->sem_ctime; 394 linux_semid64.sem_nsems = linux_semid->sem_nsems; 395 396 return (copyout(&linux_semid64, uaddr, sizeof(linux_semid64))); 397 } else 398 return (copyout(linux_semid, uaddr, sizeof(*linux_semid))); 399 } 400 401 static int 402 linux_shmid_pullup(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr) 403 { 404 struct l_shmid64_ds linux_shmid64; 405 int error; 406 407 if (ver == LINUX_IPC_64) { 408 error = copyin(uaddr, &linux_shmid64, sizeof(linux_shmid64)); 409 if (error != 0) 410 return (error); 411 412 bzero(linux_shmid, sizeof(*linux_shmid)); 413 414 linux_shmid->shm_perm.uid = linux_shmid64.shm_perm.uid; 415 linux_shmid->shm_perm.gid = linux_shmid64.shm_perm.gid; 416 linux_shmid->shm_perm.mode = linux_shmid64.shm_perm.mode; 417 } else 418 error = copyin(uaddr, linux_shmid, sizeof(*linux_shmid)); 419 420 return (error); 421 } 422 423 static int 424 linux_shmid_pushdown(l_int ver, struct l_shmid_ds *linux_shmid, caddr_t uaddr) 425 { 426 struct l_shmid64_ds linux_shmid64; 427 428 /* 429 * XXX: This is backwards and loses information in shm_nattch 430 * and shm_segsz. We should probably either expose the BSD 431 * shmid structure directly and convert it to either the 432 * non-64 or 64 variant directly or the code should always 433 * convert to the 64 variant and then truncate values into the 434 * non-64 variant if needed since the 64 variant has more 435 * precision. 436 */ 437 if (ver == LINUX_IPC_64) { 438 bzero(&linux_shmid64, sizeof(linux_shmid64)); 439 440 linux_ipc_perm_to_ipc64_perm(&linux_shmid->shm_perm, 441 &linux_shmid64.shm_perm); 442 443 linux_shmid64.shm_segsz = linux_shmid->shm_segsz; 444 linux_shmid64.shm_atime = linux_shmid->shm_atime; 445 linux_shmid64.shm_dtime = linux_shmid->shm_dtime; 446 linux_shmid64.shm_ctime = linux_shmid->shm_ctime; 447 linux_shmid64.shm_cpid = linux_shmid->shm_cpid; 448 linux_shmid64.shm_lpid = linux_shmid->shm_lpid; 449 linux_shmid64.shm_nattch = linux_shmid->shm_nattch; 450 451 return (copyout(&linux_shmid64, uaddr, sizeof(linux_shmid64))); 452 } else 453 return (copyout(linux_shmid, uaddr, sizeof(*linux_shmid))); 454 } 455 456 static int 457 linux_shminfo_pushdown(l_int ver, struct l_shminfo *linux_shminfo, 458 caddr_t uaddr) 459 { 460 struct l_shminfo64 linux_shminfo64; 461 462 if (ver == LINUX_IPC_64) { 463 bzero(&linux_shminfo64, sizeof(linux_shminfo64)); 464 465 linux_shminfo64.shmmax = linux_shminfo->shmmax; 466 linux_shminfo64.shmmin = linux_shminfo->shmmin; 467 linux_shminfo64.shmmni = linux_shminfo->shmmni; 468 linux_shminfo64.shmseg = linux_shminfo->shmseg; 469 linux_shminfo64.shmall = linux_shminfo->shmall; 470 471 return (copyout(&linux_shminfo64, uaddr, 472 sizeof(linux_shminfo64))); 473 } else 474 return (copyout(linux_shminfo, uaddr, sizeof(*linux_shminfo))); 475 } 476 477 int 478 linux_semop(struct thread *td, struct linux_semop_args *args) 479 { 480 struct semop_args /* { 481 int semid; 482 struct sembuf *sops; 483 int nsops; 484 } */ bsd_args; 485 486 bsd_args.semid = args->semid; 487 bsd_args.sops = PTRIN(args->tsops); 488 bsd_args.nsops = args->nsops; 489 return (sys_semop(td, &bsd_args)); 490 } 491 492 int 493 linux_semget(struct thread *td, struct linux_semget_args *args) 494 { 495 struct semget_args /* { 496 key_t key; 497 int nsems; 498 int semflg; 499 } */ bsd_args; 500 501 if (args->nsems < 0) 502 return (EINVAL); 503 bsd_args.key = args->key; 504 bsd_args.nsems = args->nsems; 505 bsd_args.semflg = args->semflg; 506 return (sys_semget(td, &bsd_args)); 507 } 508 509 int 510 linux_semctl(struct thread *td, struct linux_semctl_args *args) 511 { 512 struct l_semid_ds linux_semid; 513 struct l_seminfo linux_seminfo; 514 struct semid_ds semid; 515 union semun semun; 516 register_t rval; 517 int cmd, error; 518 519 memset(&linux_seminfo, 0, sizeof(linux_seminfo)); 520 memset(&linux_semid, 0, sizeof(linux_semid)); 521 522 switch (args->cmd & ~LINUX_IPC_64) { 523 case LINUX_IPC_RMID: 524 cmd = IPC_RMID; 525 break; 526 case LINUX_GETNCNT: 527 cmd = GETNCNT; 528 break; 529 case LINUX_GETPID: 530 cmd = GETPID; 531 break; 532 case LINUX_GETVAL: 533 cmd = GETVAL; 534 break; 535 case LINUX_GETZCNT: 536 cmd = GETZCNT; 537 break; 538 case LINUX_SETVAL: 539 cmd = SETVAL; 540 semun.val = args->arg.val; 541 break; 542 case LINUX_IPC_SET: 543 cmd = IPC_SET; 544 error = linux_semid_pullup(args->cmd & LINUX_IPC_64, 545 &linux_semid, PTRIN(args->arg.buf)); 546 if (error) 547 return (error); 548 linux_to_bsd_semid_ds(&linux_semid, &semid); 549 semun.buf = &semid; 550 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun, 551 td->td_retval)); 552 case LINUX_IPC_STAT: 553 case LINUX_SEM_STAT: 554 if ((args->cmd & ~LINUX_IPC_64) == LINUX_IPC_STAT) 555 cmd = IPC_STAT; 556 else 557 cmd = SEM_STAT; 558 semun.buf = &semid; 559 error = kern_semctl(td, args->semid, args->semnum, cmd, &semun, 560 &rval); 561 if (error) 562 return (error); 563 bsd_to_linux_semid_ds(&semid, &linux_semid); 564 error = linux_semid_pushdown(args->cmd & LINUX_IPC_64, 565 &linux_semid, PTRIN(args->arg.buf)); 566 if (error == 0) 567 td->td_retval[0] = (cmd == SEM_STAT) ? rval : 0; 568 return (error); 569 case LINUX_IPC_INFO: 570 case LINUX_SEM_INFO: 571 bcopy(&seminfo, &linux_seminfo.semmni, sizeof(linux_seminfo) - 572 sizeof(linux_seminfo.semmap) ); 573 /* 574 * Linux does not use the semmap field but populates it with 575 * the defined value from SEMMAP, which really is redefined to 576 * SEMMNS, which they define as SEMMNI * SEMMSL. Try to 577 * simulate this returning our dynamic semmns value. 578 */ 579 linux_seminfo.semmap = linux_seminfo.semmns; 580 /* XXX BSD equivalent? 581 #define used_semids 10 582 #define used_sems 10 583 linux_seminfo.semusz = used_semids; 584 linux_seminfo.semaem = used_sems; 585 */ 586 error = copyout(&linux_seminfo, 587 PTRIN(args->arg.buf), sizeof(linux_seminfo)); 588 if (error) 589 return (error); 590 td->td_retval[0] = seminfo.semmni; 591 return (0); /* No need for __semctl call */ 592 case LINUX_GETALL: 593 cmd = GETALL; 594 semun.val = args->arg.val; 595 break; 596 case LINUX_SETALL: 597 cmd = SETALL; 598 semun.val = args->arg.val; 599 break; 600 default: 601 linux_msg(td, "ipc type %d is not implemented", 602 args->cmd & ~LINUX_IPC_64); 603 return (EINVAL); 604 } 605 return (kern_semctl(td, args->semid, args->semnum, cmd, &semun, 606 td->td_retval)); 607 } 608 609 int 610 linux_msgsnd(struct thread *td, struct linux_msgsnd_args *args) 611 { 612 const void *msgp; 613 long mtype; 614 l_long lmtype; 615 int error; 616 617 if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax) 618 return (EINVAL); 619 msgp = PTRIN(args->msgp); 620 if ((error = copyin(msgp, &lmtype, sizeof(lmtype))) != 0) 621 return (error); 622 mtype = (long)lmtype; 623 return (kern_msgsnd(td, args->msqid, 624 (const char *)msgp + sizeof(lmtype), 625 args->msgsz, args->msgflg, mtype)); 626 } 627 628 int 629 linux_msgrcv(struct thread *td, struct linux_msgrcv_args *args) 630 { 631 void *msgp; 632 long mtype; 633 l_long lmtype; 634 int error; 635 636 if ((l_long)args->msgsz < 0 || args->msgsz > (l_long)msginfo.msgmax) 637 return (EINVAL); 638 msgp = PTRIN(args->msgp); 639 if ((error = kern_msgrcv(td, args->msqid, 640 (char *)msgp + sizeof(lmtype), args->msgsz, 641 args->msgtyp, args->msgflg, &mtype)) != 0) 642 return (error); 643 lmtype = (l_long)mtype; 644 return (copyout(&lmtype, msgp, sizeof(lmtype))); 645 } 646 647 int 648 linux_msgget(struct thread *td, struct linux_msgget_args *args) 649 { 650 struct msgget_args /* { 651 key_t key; 652 int msgflg; 653 } */ bsd_args; 654 655 bsd_args.key = args->key; 656 bsd_args.msgflg = args->msgflg; 657 return (sys_msgget(td, &bsd_args)); 658 } 659 660 int 661 linux_msgctl(struct thread *td, struct linux_msgctl_args *args) 662 { 663 int error, bsd_cmd; 664 struct l_msqid_ds linux_msqid; 665 struct msqid_ds bsd_msqid; 666 667 memset(&linux_msqid, 0, sizeof(linux_msqid)); 668 669 bsd_cmd = args->cmd & ~LINUX_IPC_64; 670 switch (bsd_cmd) { 671 case LINUX_IPC_INFO: 672 case LINUX_MSG_INFO: { 673 struct l_msginfo linux_msginfo; 674 675 memset(&linux_msginfo, 0, sizeof(linux_msginfo)); 676 /* 677 * XXX MSG_INFO uses the same data structure but returns different 678 * dynamic counters in msgpool, msgmap, and msgtql fields. 679 */ 680 linux_msginfo.msgpool = (long)msginfo.msgmni * 681 (long)msginfo.msgmnb / 1024L; /* XXX MSG_INFO. */ 682 linux_msginfo.msgmap = msginfo.msgmnb; /* XXX MSG_INFO. */ 683 linux_msginfo.msgmax = msginfo.msgmax; 684 linux_msginfo.msgmnb = msginfo.msgmnb; 685 linux_msginfo.msgmni = msginfo.msgmni; 686 linux_msginfo.msgssz = msginfo.msgssz; 687 linux_msginfo.msgtql = msginfo.msgtql; /* XXX MSG_INFO. */ 688 linux_msginfo.msgseg = msginfo.msgseg; 689 error = copyout(&linux_msginfo, PTRIN(args->buf), 690 sizeof(linux_msginfo)); 691 if (error == 0) 692 td->td_retval[0] = msginfo.msgmni; /* XXX */ 693 694 return (error); 695 } 696 697 /* 698 * TODO: implement this 699 * case LINUX_MSG_STAT: 700 */ 701 case LINUX_IPC_STAT: 702 /* NOTHING */ 703 break; 704 705 case LINUX_IPC_SET: 706 error = linux_msqid_pullup(args->cmd & LINUX_IPC_64, 707 &linux_msqid, PTRIN(args->buf)); 708 if (error) 709 return (error); 710 linux_to_bsd_msqid_ds(&linux_msqid, &bsd_msqid); 711 break; 712 713 case LINUX_IPC_RMID: 714 /* NOTHING */ 715 break; 716 717 default: 718 return (EINVAL); 719 break; 720 } 721 722 error = kern_msgctl(td, args->msqid, bsd_cmd, &bsd_msqid); 723 if (error != 0) 724 if (bsd_cmd != LINUX_IPC_RMID || error != EINVAL) 725 return (error); 726 727 if (bsd_cmd == LINUX_IPC_STAT) { 728 bsd_to_linux_msqid_ds(&bsd_msqid, &linux_msqid); 729 return (linux_msqid_pushdown(args->cmd & LINUX_IPC_64, 730 &linux_msqid, PTRIN(args->buf))); 731 } 732 733 return (0); 734 } 735 736 int 737 linux_shmat(struct thread *td, struct linux_shmat_args *args) 738 { 739 struct shmat_args /* { 740 int shmid; 741 void *shmaddr; 742 int shmflg; 743 } */ bsd_args; 744 int error; 745 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 746 l_uintptr_t addr; 747 #endif 748 749 bsd_args.shmid = args->shmid; 750 bsd_args.shmaddr = PTRIN(args->shmaddr); 751 bsd_args.shmflg = args->shmflg; 752 if ((error = sys_shmat(td, &bsd_args))) 753 return (error); 754 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 755 addr = td->td_retval[0]; 756 if ((error = copyout(&addr, PTRIN(args->raddr), sizeof(addr)))) 757 return (error); 758 td->td_retval[0] = 0; 759 #endif 760 return (0); 761 } 762 763 int 764 linux_shmdt(struct thread *td, struct linux_shmdt_args *args) 765 { 766 struct shmdt_args /* { 767 void *shmaddr; 768 } */ bsd_args; 769 770 bsd_args.shmaddr = PTRIN(args->shmaddr); 771 return (sys_shmdt(td, &bsd_args)); 772 } 773 774 int 775 linux_shmget(struct thread *td, struct linux_shmget_args *args) 776 { 777 struct shmget_args /* { 778 key_t key; 779 int size; 780 int shmflg; 781 } */ bsd_args; 782 783 bsd_args.key = args->key; 784 bsd_args.size = args->size; 785 bsd_args.shmflg = args->shmflg; 786 return (sys_shmget(td, &bsd_args)); 787 } 788 789 int 790 linux_shmctl(struct thread *td, struct linux_shmctl_args *args) 791 { 792 struct l_shmid_ds linux_shmid; 793 struct l_shminfo linux_shminfo; 794 struct l_shm_info linux_shm_info; 795 struct shmid_ds bsd_shmid; 796 int error; 797 798 memset(&linux_shm_info, 0, sizeof(linux_shm_info)); 799 memset(&linux_shmid, 0, sizeof(linux_shmid)); 800 memset(&linux_shminfo, 0, sizeof(linux_shminfo)); 801 802 switch (args->cmd & ~LINUX_IPC_64) { 803 804 case LINUX_IPC_INFO: { 805 struct shminfo bsd_shminfo; 806 807 /* Perform shmctl wanting removed segments lookup */ 808 error = kern_shmctl(td, args->shmid, IPC_INFO, 809 (void *)&bsd_shminfo, NULL); 810 if (error) 811 return (error); 812 813 bsd_to_linux_shminfo(&bsd_shminfo, &linux_shminfo); 814 815 return (linux_shminfo_pushdown(args->cmd & LINUX_IPC_64, 816 &linux_shminfo, PTRIN(args->buf))); 817 } 818 819 case LINUX_SHM_INFO: { 820 struct shm_info bsd_shm_info; 821 822 /* Perform shmctl wanting removed segments lookup */ 823 error = kern_shmctl(td, args->shmid, SHM_INFO, 824 (void *)&bsd_shm_info, NULL); 825 if (error) 826 return (error); 827 828 bsd_to_linux_shm_info(&bsd_shm_info, &linux_shm_info); 829 830 return (copyout(&linux_shm_info, PTRIN(args->buf), 831 sizeof(struct l_shm_info))); 832 } 833 834 case LINUX_IPC_STAT: 835 /* Perform shmctl wanting removed segments lookup */ 836 error = kern_shmctl(td, args->shmid, IPC_STAT, 837 (void *)&bsd_shmid, NULL); 838 if (error) 839 return (error); 840 841 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid); 842 843 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64, 844 &linux_shmid, PTRIN(args->buf))); 845 846 case LINUX_SHM_STAT: 847 /* Perform shmctl wanting removed segments lookup */ 848 error = kern_shmctl(td, args->shmid, IPC_STAT, 849 (void *)&bsd_shmid, NULL); 850 if (error) 851 return (error); 852 853 bsd_to_linux_shmid_ds(&bsd_shmid, &linux_shmid); 854 855 return (linux_shmid_pushdown(args->cmd & LINUX_IPC_64, 856 &linux_shmid, PTRIN(args->buf))); 857 858 case LINUX_IPC_SET: 859 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64, 860 &linux_shmid, PTRIN(args->buf)); 861 if (error) 862 return (error); 863 864 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid); 865 866 /* Perform shmctl wanting removed segments lookup */ 867 return (kern_shmctl(td, args->shmid, IPC_SET, 868 (void *)&bsd_shmid, NULL)); 869 870 case LINUX_IPC_RMID: { 871 void *buf; 872 873 if (args->buf == 0) 874 buf = NULL; 875 else { 876 error = linux_shmid_pullup(args->cmd & LINUX_IPC_64, 877 &linux_shmid, PTRIN(args->buf)); 878 if (error) 879 return (error); 880 linux_to_bsd_shmid_ds(&linux_shmid, &bsd_shmid); 881 buf = (void *)&bsd_shmid; 882 } 883 return (kern_shmctl(td, args->shmid, IPC_RMID, buf, NULL)); 884 } 885 886 case LINUX_SHM_LOCK: 887 /* FALLTHROUGH */ 888 case LINUX_SHM_UNLOCK: 889 /* FALLTHROUGH */ 890 default: 891 linux_msg(td, "ipc type %d not implemented", 892 args->cmd & ~LINUX_IPC_64); 893 return (EINVAL); 894 } 895 } 896 897 MODULE_DEPEND(linux, sysvmsg, 1, 1, 1); 898 MODULE_DEPEND(linux, sysvsem, 1, 1, 1); 899 MODULE_DEPEND(linux, sysvshm, 1, 1, 1);
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