| 1 | /* $NetBSD: linux_ipc.c,v 1.55 2011/05/28 23:24:58 alnsn 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: linux_ipc.c,v 1.55 2011/05/28 23:24:58 alnsn Exp $" ); |
| 34 | |
| 35 | #if defined(_KERNEL_OPT) |
| 36 | #include "opt_sysv.h" |
| 37 | #endif |
| 38 | |
| 39 | #include <sys/param.h> |
| 40 | #include <sys/shm.h> |
| 41 | #include <sys/sem.h> |
| 42 | #include <sys/msg.h> |
| 43 | #include <sys/proc.h> |
| 44 | #include <sys/systm.h> |
| 45 | #include <sys/vnode.h> |
| 46 | |
| 47 | #include <sys/mount.h> |
| 48 | #include <sys/syscallargs.h> |
| 49 | |
| 50 | #include <compat/linux/common/linux_types.h> |
| 51 | #include <compat/linux/common/linux_signal.h> |
| 52 | #include <compat/linux/common/linux_util.h> |
| 53 | #include <compat/linux/common/linux_ipc.h> |
| 54 | #include <compat/linux/common/linux_msg.h> |
| 55 | #include <compat/linux/common/linux_shm.h> |
| 56 | #include <compat/linux/common/linux_sem.h> |
| 57 | |
| 58 | #include <compat/linux/linux_syscallargs.h> |
| 59 | #include <compat/linux/linux_syscall.h> |
| 60 | |
| 61 | #include <compat/linux/common/linux_ipccall.h> |
| 62 | #include <compat/linux/common/linux_machdep.h> |
| 63 | |
| 64 | /* |
| 65 | * Note: Not all linux architechtures have explicit versions |
| 66 | * of the SYSV* syscalls. On the ones that don't |
| 67 | * we pretend that they are defined anyway. *_args and |
| 68 | * prototypes are defined in individual headers; |
| 69 | * syscalls.master lists those syscalls as NOARGS. |
| 70 | * |
| 71 | * The functions in multiarch are the ones that just need |
| 72 | * the arguments shuffled around and then use the |
| 73 | * normal NetBSD syscall. |
| 74 | * |
| 75 | * Function in multiarch: |
| 76 | * linux_sys_ipc : linux_ipccall.c |
| 77 | * linux_semop : linux_ipccall.c |
| 78 | * linux_semget : linux_ipccall.c |
| 79 | * linux_msgsnd : linux_ipccall.c |
| 80 | * linux_msgrcv : linux_ipccall.c |
| 81 | * linux_msgget : linux_ipccall.c |
| 82 | * linux_shmdt : linux_ipccall.c |
| 83 | * linux_shmget : linux_ipccall.c |
| 84 | */ |
| 85 | |
| 86 | #if defined (SYSVSEM) || defined(SYSVSHM) || defined(SYSVMSG) |
| 87 | /* |
| 88 | * Convert between Linux and NetBSD ipc_perm structures. Only the |
| 89 | * order of the fields is different. |
| 90 | */ |
| 91 | void |
| 92 | linux_to_bsd_ipc_perm(struct linux_ipc_perm *lpp, struct ipc_perm *bpp) |
| 93 | { |
| 94 | |
| 95 | bpp->_key = lpp->l_key; |
| 96 | bpp->uid = lpp->l_uid; |
| 97 | bpp->gid = lpp->l_gid; |
| 98 | bpp->cuid = lpp->l_cuid; |
| 99 | bpp->cgid = lpp->l_cgid; |
| 100 | bpp->mode = lpp->l_mode; |
| 101 | bpp->_seq = lpp->l_seq; |
| 102 | } |
| 103 | |
| 104 | void |
| 105 | linux_to_bsd_ipc64_perm(struct linux_ipc64_perm *lpp, struct ipc_perm *bpp) |
| 106 | { |
| 107 | bpp->_key = lpp->l_key; |
| 108 | bpp->uid = lpp->l_uid; |
| 109 | bpp->gid = lpp->l_gid; |
| 110 | bpp->cuid = lpp->l_cuid; |
| 111 | bpp->cgid = lpp->l_cgid; |
| 112 | bpp->mode = lpp->l_mode; |
| 113 | bpp->_seq = lpp->l_seq; |
| 114 | } |
| 115 | |
| 116 | void |
| 117 | bsd_to_linux_ipc_perm(struct ipc_perm *bpp, struct linux_ipc_perm *lpp) |
| 118 | { |
| 119 | |
| 120 | lpp->l_key = bpp->_key; |
| 121 | lpp->l_uid = bpp->uid; |
| 122 | lpp->l_gid = bpp->gid; |
| 123 | lpp->l_cuid = bpp->cuid; |
| 124 | lpp->l_cgid = bpp->cgid; |
| 125 | lpp->l_mode = bpp->mode; |
| 126 | lpp->l_seq = bpp->_seq; |
| 127 | } |
| 128 | |
| 129 | void |
| 130 | bsd_to_linux_ipc64_perm(struct ipc_perm *bpp, struct linux_ipc64_perm *lpp) |
| 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 | #endif |
| 142 | |
| 143 | #ifdef SYSVSEM |
| 144 | /* |
| 145 | * Semaphore operations. Most constants and structures are the same on |
| 146 | * both systems. Only semctl() needs some extra work. |
| 147 | */ |
| 148 | |
| 149 | /* |
| 150 | * Convert between Linux and NetBSD semid_ds structures. |
| 151 | */ |
| 152 | void |
| 153 | bsd_to_linux_semid_ds(struct semid_ds *bs, struct linux_semid_ds *ls) |
| 154 | { |
| 155 | bsd_to_linux_ipc_perm(&bs->sem_perm, &ls->l_sem_perm); |
| 156 | ls->l_sem_otime = bs->sem_otime; |
| 157 | ls->l_sem_ctime = bs->sem_ctime; |
| 158 | ls->l_sem_nsems = bs->sem_nsems; |
| 159 | ls->l_sem_base = bs->_sem_base; |
| 160 | } |
| 161 | |
| 162 | void |
| 163 | bsd_to_linux_semid64_ds(struct semid_ds *bs, struct linux_semid64_ds *ls) |
| 164 | { |
| 165 | bsd_to_linux_ipc64_perm(&bs->sem_perm, &ls->l_sem_perm); |
| 166 | ls->l_sem_otime = bs->sem_otime; |
| 167 | ls->l_sem_ctime = bs->sem_ctime; |
| 168 | ls->l_sem_nsems = bs->sem_nsems; |
| 169 | } |
| 170 | |
| 171 | void |
| 172 | linux_to_bsd_semid_ds(struct linux_semid_ds *ls, struct semid_ds *bs) |
| 173 | { |
| 174 | linux_to_bsd_ipc_perm(&ls->l_sem_perm, &bs->sem_perm); |
| 175 | bs->sem_otime = ls->l_sem_otime; |
| 176 | bs->sem_ctime = ls->l_sem_ctime; |
| 177 | bs->sem_nsems = ls->l_sem_nsems; |
| 178 | bs->_sem_base = ls->l_sem_base; |
| 179 | } |
| 180 | |
| 181 | void |
| 182 | linux_to_bsd_semid64_ds(struct linux_semid64_ds *ls, struct semid_ds *bs) |
| 183 | { |
| 184 | linux_to_bsd_ipc64_perm(&ls->l_sem_perm, &bs->sem_perm); |
| 185 | bs->sem_otime = ls->l_sem_otime; |
| 186 | bs->sem_ctime = ls->l_sem_ctime; |
| 187 | bs->sem_nsems = ls->l_sem_nsems; |
| 188 | } |
| 189 | |
| 190 | /* |
| 191 | * Most of this can be handled by directly passing the arguments on; we |
| 192 | * just need to frob the `cmd' and convert the semid_ds and semun. |
| 193 | */ |
| 194 | int |
| 195 | linux_sys_semctl(struct lwp *l, const struct linux_sys_semctl_args *uap, register_t *retval) |
| 196 | { |
| 197 | /* { |
| 198 | syscallarg(int) semid; |
| 199 | syscallarg(int) semnum; |
| 200 | syscallarg(int) cmd; |
| 201 | syscallarg(union linux_semun) arg; |
| 202 | } */ |
| 203 | struct semid_ds sembuf; |
| 204 | struct linux_semid_ds lsembuf; |
| 205 | struct linux_semid64_ds lsembuf64; |
| 206 | union __semun semun; |
| 207 | int cmd, lcmd, error; |
| 208 | void *pass_arg = NULL; |
| 209 | |
| 210 | lcmd = SCARG(uap, cmd); |
| 211 | #ifdef LINUX_IPC_FORCE64 |
| 212 | lcmd |= LINUX_IPC_64; |
| 213 | #endif |
| 214 | |
| 215 | switch (lcmd & ~LINUX_IPC_64) { |
| 216 | case LINUX_IPC_SET: |
| 217 | if (lcmd & LINUX_IPC_64) { |
| 218 | error = copyin(SCARG(uap, arg).l_buf, &lsembuf64, |
| 219 | sizeof(lsembuf64)); |
| 220 | linux_to_bsd_semid64_ds(&lsembuf64, &sembuf); |
| 221 | } else { |
| 222 | error = copyin(SCARG(uap, arg).l_buf, &lsembuf, |
| 223 | sizeof(lsembuf)); |
| 224 | linux_to_bsd_semid_ds(&lsembuf, &sembuf); |
| 225 | } |
| 226 | if (error) |
| 227 | return (error); |
| 228 | pass_arg = &sembuf; |
| 229 | cmd = IPC_SET; |
| 230 | break; |
| 231 | |
| 232 | case LINUX_IPC_STAT: |
| 233 | pass_arg = &sembuf; |
| 234 | cmd = IPC_STAT; |
| 235 | break; |
| 236 | |
| 237 | case LINUX_IPC_RMID: |
| 238 | cmd = IPC_RMID; |
| 239 | break; |
| 240 | |
| 241 | case LINUX_GETVAL: |
| 242 | cmd = GETVAL; |
| 243 | break; |
| 244 | |
| 245 | case LINUX_GETPID: |
| 246 | cmd = GETPID; |
| 247 | break; |
| 248 | |
| 249 | case LINUX_GETNCNT: |
| 250 | cmd = GETNCNT; |
| 251 | break; |
| 252 | |
| 253 | case LINUX_GETZCNT: |
| 254 | cmd = GETZCNT; |
| 255 | break; |
| 256 | |
| 257 | case LINUX_GETALL: |
| 258 | pass_arg = &semun; |
| 259 | semun.array = SCARG(uap, arg).l_array; |
| 260 | cmd = GETALL; |
| 261 | break; |
| 262 | |
| 263 | case LINUX_SETVAL: |
| 264 | pass_arg = &semun; |
| 265 | semun.val = SCARG(uap, arg).l_val; |
| 266 | cmd = SETVAL; |
| 267 | break; |
| 268 | |
| 269 | case LINUX_SETALL: |
| 270 | pass_arg = &semun; |
| 271 | semun.array = SCARG(uap, arg).l_array; |
| 272 | cmd = SETALL; |
| 273 | break; |
| 274 | |
| 275 | default: |
| 276 | return (EINVAL); |
| 277 | } |
| 278 | |
| 279 | error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd, |
| 280 | pass_arg, retval); |
| 281 | if (error) |
| 282 | return error; |
| 283 | |
| 284 | switch (lcmd) { |
| 285 | case LINUX_IPC_STAT: |
| 286 | bsd_to_linux_semid_ds(&sembuf, &lsembuf); |
| 287 | error = copyout(&lsembuf, SCARG(uap, arg).l_buf, |
| 288 | sizeof(lsembuf)); |
| 289 | break; |
| 290 | case LINUX_IPC_STAT | LINUX_IPC_64: |
| 291 | bsd_to_linux_semid64_ds(&sembuf, &lsembuf64); |
| 292 | error = copyout(&lsembuf64, SCARG(uap, arg).l_buf, |
| 293 | sizeof(lsembuf64)); |
| 294 | break; |
| 295 | default: |
| 296 | break; |
| 297 | } |
| 298 | |
| 299 | return (error); |
| 300 | } |
| 301 | #endif /* SYSVSEM */ |
| 302 | |
| 303 | #ifdef SYSVMSG |
| 304 | |
| 305 | void |
| 306 | linux_to_bsd_msqid_ds(struct linux_msqid_ds *lmp, struct msqid_ds *bmp) |
| 307 | { |
| 308 | |
| 309 | memset(bmp, 0, sizeof(*bmp)); |
| 310 | linux_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm); |
| 311 | bmp->_msg_first = lmp->l_msg_first; |
| 312 | bmp->_msg_last = lmp->l_msg_last; |
| 313 | bmp->_msg_cbytes = lmp->l_msg_cbytes; |
| 314 | bmp->msg_qnum = lmp->l_msg_qnum; |
| 315 | bmp->msg_qbytes = lmp->l_msg_qbytes; |
| 316 | bmp->msg_lspid = lmp->l_msg_lspid; |
| 317 | bmp->msg_lrpid = lmp->l_msg_lrpid; |
| 318 | bmp->msg_stime = lmp->l_msg_stime; |
| 319 | bmp->msg_rtime = lmp->l_msg_rtime; |
| 320 | bmp->msg_ctime = lmp->l_msg_ctime; |
| 321 | } |
| 322 | |
| 323 | void |
| 324 | linux_to_bsd_msqid64_ds(struct linux_msqid64_ds *lmp, struct msqid_ds *bmp) |
| 325 | { |
| 326 | |
| 327 | memset(bmp, 0, sizeof(*bmp)); |
| 328 | linux_to_bsd_ipc64_perm(&lmp->l_msg_perm, &bmp->msg_perm); |
| 329 | bmp->msg_stime = lmp->l_msg_stime; |
| 330 | bmp->msg_rtime = lmp->l_msg_rtime; |
| 331 | bmp->msg_ctime = lmp->l_msg_ctime; |
| 332 | bmp->_msg_cbytes = lmp->l_msg_cbytes; |
| 333 | bmp->msg_qnum = lmp->l_msg_qnum; |
| 334 | bmp->msg_qbytes = lmp->l_msg_qbytes; |
| 335 | bmp->msg_lspid = lmp->l_msg_lspid; |
| 336 | bmp->msg_lrpid = lmp->l_msg_lrpid; |
| 337 | } |
| 338 | |
| 339 | void |
| 340 | bsd_to_linux_msqid_ds(struct msqid_ds *bmp, struct linux_msqid_ds *lmp) |
| 341 | { |
| 342 | |
| 343 | memset(lmp, 0, sizeof(*lmp)); |
| 344 | bsd_to_linux_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm); |
| 345 | lmp->l_msg_first = bmp->_msg_first; |
| 346 | lmp->l_msg_last = bmp->_msg_last; |
| 347 | lmp->l_msg_cbytes = bmp->_msg_cbytes; |
| 348 | lmp->l_msg_qnum = bmp->msg_qnum; |
| 349 | lmp->l_msg_qbytes = bmp->msg_qbytes; |
| 350 | lmp->l_msg_lspid = bmp->msg_lspid; |
| 351 | lmp->l_msg_lrpid = bmp->msg_lrpid; |
| 352 | lmp->l_msg_stime = bmp->msg_stime; |
| 353 | lmp->l_msg_rtime = bmp->msg_rtime; |
| 354 | lmp->l_msg_ctime = bmp->msg_ctime; |
| 355 | } |
| 356 | |
| 357 | void |
| 358 | bsd_to_linux_msqid64_ds(struct msqid_ds *bmp, struct linux_msqid64_ds *lmp) |
| 359 | { |
| 360 | |
| 361 | memset(lmp, 0, sizeof(*lmp)); |
| 362 | bsd_to_linux_ipc64_perm(&bmp->msg_perm, &lmp->l_msg_perm); |
| 363 | lmp->l_msg_stime = bmp->msg_stime; |
| 364 | lmp->l_msg_rtime = bmp->msg_rtime; |
| 365 | lmp->l_msg_ctime = bmp->msg_ctime; |
| 366 | lmp->l_msg_cbytes = bmp->_msg_cbytes; |
| 367 | lmp->l_msg_qnum = bmp->msg_qnum; |
| 368 | lmp->l_msg_qbytes = bmp->msg_qbytes; |
| 369 | lmp->l_msg_lspid = bmp->msg_lspid; |
| 370 | lmp->l_msg_lrpid = bmp->msg_lrpid; |
| 371 | } |
| 372 | |
| 373 | int |
| 374 | linux_sys_msgctl(struct lwp *l, const struct linux_sys_msgctl_args *uap, register_t *retval) |
| 375 | { |
| 376 | /* { |
| 377 | syscallarg(int) msqid; |
| 378 | syscallarg(int) cmd; |
| 379 | syscallarg(struct linux_msqid_ds *) buf; |
| 380 | } */ |
| 381 | struct msqid_ds bm, *bmp = NULL; |
| 382 | struct linux_msqid_ds lm; |
| 383 | struct linux_msqid64_ds lm64; |
| 384 | int cmd, lcmd, error; |
| 385 | |
| 386 | lcmd = SCARG(uap, cmd); |
| 387 | #ifdef LINUX_IPC_FORCE64 |
| 388 | lcmd |= LINUX_IPC_64; |
| 389 | #endif |
| 390 | |
| 391 | switch (lcmd & ~LINUX_IPC_64) { |
| 392 | case LINUX_IPC_STAT: |
| 393 | cmd = IPC_STAT; |
| 394 | bmp = &bm; |
| 395 | break; |
| 396 | case LINUX_IPC_SET: |
| 397 | if (lcmd & LINUX_IPC_64) { |
| 398 | error = copyin(SCARG(uap, buf), &lm64, sizeof lm64); |
| 399 | linux_to_bsd_msqid64_ds(&lm64, &bm); |
| 400 | } else { |
| 401 | error = copyin(SCARG(uap, buf), &lm, sizeof lm); |
| 402 | linux_to_bsd_msqid_ds(&lm, &bm); |
| 403 | } |
| 404 | if (error) |
| 405 | return error; |
| 406 | cmd = IPC_SET; |
| 407 | bmp = &bm; |
| 408 | break; |
| 409 | case LINUX_IPC_RMID: |
| 410 | cmd = IPC_RMID; |
| 411 | break; |
| 412 | default: |
| 413 | return EINVAL; |
| 414 | } |
| 415 | |
| 416 | if ((error = msgctl1(l, SCARG(uap, msqid), cmd, bmp))) |
| 417 | return error; |
| 418 | |
| 419 | switch (lcmd) { |
| 420 | case LINUX_IPC_STAT: |
| 421 | bsd_to_linux_msqid_ds(&bm, &lm); |
| 422 | error = copyout(&lm, SCARG(uap, buf), sizeof lm); |
| 423 | break; |
| 424 | case LINUX_IPC_STAT|LINUX_IPC_64: |
| 425 | bsd_to_linux_msqid64_ds(&bm, &lm64); |
| 426 | error = copyout(&lm64, SCARG(uap, buf), sizeof lm64); |
| 427 | break; |
| 428 | default: |
| 429 | break; |
| 430 | } |
| 431 | |
| 432 | return error; |
| 433 | } |
| 434 | #endif /* SYSVMSG */ |
| 435 | |
| 436 | #ifdef SYSVSHM |
| 437 | /* |
| 438 | * shmget(2). Just make sure the Linux-compatible shmat() semantics |
| 439 | * is enabled for the segment, so that shmat() succeeds even when |
| 440 | * the segment would be removed. |
| 441 | */ |
| 442 | int |
| 443 | linux_sys_shmget(struct lwp *l, const struct linux_sys_shmget_args *uap, register_t *retval) |
| 444 | { |
| 445 | /* { |
| 446 | syscallarg(key_t) key; |
| 447 | syscallarg(size_t) size; |
| 448 | syscallarg(int) shmflg; |
| 449 | } */ |
| 450 | struct sys_shmget_args bsd_ua; |
| 451 | |
| 452 | SCARG(&bsd_ua, key) = SCARG(uap, key); |
| 453 | SCARG(&bsd_ua, size) = SCARG(uap, size); |
| 454 | SCARG(&bsd_ua, shmflg) = SCARG(uap, shmflg) | _SHM_RMLINGER; |
| 455 | |
| 456 | return sys_shmget(l, &bsd_ua, retval); |
| 457 | } |
| 458 | |
| 459 | /* |
| 460 | * shmat(2). Very straightforward, except that Linux passes a pointer |
| 461 | * in which the return value is to be passed. This is subsequently |
| 462 | * handled by libc, apparently. |
| 463 | */ |
| 464 | #ifndef __amd64__ |
| 465 | int |
| 466 | linux_sys_shmat(struct lwp *l, const struct linux_sys_shmat_args *uap, register_t *retval) |
| 467 | { |
| 468 | /* { |
| 469 | syscallarg(int) shmid; |
| 470 | syscallarg(void *) shmaddr; |
| 471 | syscallarg(int) shmflg; |
| 472 | syscallarg(u_long *) raddr; |
| 473 | } */ |
| 474 | int error; |
| 475 | |
| 476 | if ((error = sys_shmat(l, (const void *)uap, retval))) |
| 477 | return error; |
| 478 | |
| 479 | if ((error = copyout(&retval[0], SCARG(uap, raddr), sizeof retval[0]))) |
| 480 | return error; |
| 481 | |
| 482 | retval[0] = 0; |
| 483 | return 0; |
| 484 | } |
| 485 | #endif /* __amd64__ */ |
| 486 | |
| 487 | /* |
| 488 | * Convert between Linux and NetBSD shmid_ds structures. |
| 489 | * The order of the fields is once again the difference, and |
| 490 | * we also need a place to store the internal data pointer |
| 491 | * in, which is unfortunately stored in this structure. |
| 492 | * |
| 493 | * We abuse a Linux internal field for that. |
| 494 | */ |
| 495 | void |
| 496 | linux_to_bsd_shmid_ds(struct linux_shmid_ds *lsp, struct shmid_ds *bsp) |
| 497 | { |
| 498 | |
| 499 | linux_to_bsd_ipc_perm(&lsp->l_shm_perm, &bsp->shm_perm); |
| 500 | bsp->shm_segsz = lsp->l_shm_segsz; |
| 501 | bsp->shm_lpid = lsp->l_shm_lpid; |
| 502 | bsp->shm_cpid = lsp->l_shm_cpid; |
| 503 | bsp->shm_nattch = lsp->l_shm_nattch; |
| 504 | bsp->shm_atime = lsp->l_shm_atime; |
| 505 | bsp->shm_dtime = lsp->l_shm_dtime; |
| 506 | bsp->shm_ctime = lsp->l_shm_ctime; |
| 507 | bsp->_shm_internal = lsp->l_private2; /* XXX Oh well. */ |
| 508 | } |
| 509 | |
| 510 | void |
| 511 | linux_to_bsd_shmid64_ds(struct linux_shmid64_ds *lsp, struct shmid_ds *bsp) |
| 512 | { |
| 513 | |
| 514 | linux_to_bsd_ipc64_perm(&lsp->l_shm_perm, &bsp->shm_perm); |
| 515 | bsp->shm_segsz = lsp->l_shm_segsz; |
| 516 | bsp->shm_lpid = lsp->l_shm_lpid; |
| 517 | bsp->shm_cpid = lsp->l_shm_cpid; |
| 518 | bsp->shm_nattch = lsp->l_shm_nattch; |
| 519 | bsp->shm_atime = lsp->l_shm_atime; |
| 520 | bsp->shm_dtime = lsp->l_shm_dtime; |
| 521 | bsp->shm_ctime = lsp->l_shm_ctime; |
| 522 | bsp->_shm_internal = (void*)lsp->l___unused5; /* XXX Oh well. */ |
| 523 | } |
| 524 | |
| 525 | void |
| 526 | bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct linux_shmid_ds *lsp) |
| 527 | { |
| 528 | |
| 529 | bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->l_shm_perm); |
| 530 | lsp->l_shm_segsz = bsp->shm_segsz; |
| 531 | lsp->l_shm_lpid = bsp->shm_lpid; |
| 532 | lsp->l_shm_cpid = bsp->shm_cpid; |
| 533 | lsp->l_shm_nattch = bsp->shm_nattch; |
| 534 | lsp->l_shm_atime = bsp->shm_atime; |
| 535 | lsp->l_shm_dtime = bsp->shm_dtime; |
| 536 | lsp->l_shm_ctime = bsp->shm_ctime; |
| 537 | lsp->l_private2 = bsp->_shm_internal; /* XXX */ |
| 538 | } |
| 539 | |
| 540 | void |
| 541 | bsd_to_linux_shmid64_ds(struct shmid_ds *bsp, struct linux_shmid64_ds *lsp) |
| 542 | { |
| 543 | bsd_to_linux_ipc64_perm(&bsp->shm_perm, &lsp->l_shm_perm); |
| 544 | lsp->l_shm_segsz = bsp->shm_segsz; |
| 545 | lsp->l_shm_lpid = bsp->shm_lpid; |
| 546 | lsp->l_shm_cpid = bsp->shm_cpid; |
| 547 | lsp->l_shm_nattch = bsp->shm_nattch; |
| 548 | lsp->l_shm_atime = bsp->shm_atime; |
| 549 | lsp->l_shm_dtime = bsp->shm_dtime; |
| 550 | lsp->l_shm_ctime = bsp->shm_ctime; |
| 551 | lsp->l___unused5 = (u_long)bsp->_shm_internal; /* XXX */ |
| 552 | } |
| 553 | |
| 554 | /* |
| 555 | * shmctl. |
| 556 | * |
| 557 | * The usual structure conversion and massaging is done. |
| 558 | */ |
| 559 | int |
| 560 | linux_sys_shmctl(struct lwp *l, const struct linux_sys_shmctl_args *uap, register_t *retval) |
| 561 | { |
| 562 | /* { |
| 563 | syscallarg(int) shmid; |
| 564 | syscallarg(int) cmd; |
| 565 | syscallarg(struct linux_shmid_ds *) buf; |
| 566 | } */ |
| 567 | struct shmid_ds bs; |
| 568 | struct linux_shmid_ds ls; |
| 569 | struct linux_shmid64_ds ls64; |
| 570 | struct linux_shminfo64 lsi64; |
| 571 | struct linux_shm_info lsi; |
| 572 | int error, i, cmd, shmid; |
| 573 | |
| 574 | shmid = SCARG(uap, shmid); |
| 575 | cmd = SCARG(uap, cmd); |
| 576 | #ifdef LINUX_IPC_FORCE64 |
| 577 | cmd |= LINUX_IPC_64; |
| 578 | #endif |
| 579 | |
| 580 | switch (cmd & ~LINUX_IPC_64) { |
| 581 | case LINUX_SHM_STAT: |
| 582 | shmid = IXSEQ_TO_IPCID(shmid, shmsegs[shmid].shm_perm); |
| 583 | retval[0] = shmid; |
| 584 | /*FALLTHROUGH*/ |
| 585 | |
| 586 | case LINUX_IPC_STAT: |
| 587 | error = shmctl1(l, shmid, IPC_STAT, &bs); |
| 588 | if (error != 0) |
| 589 | return error; |
| 590 | if (cmd & LINUX_IPC_64) { |
| 591 | bsd_to_linux_shmid64_ds(&bs, &ls64); |
| 592 | error = copyout(&ls64, SCARG(uap, buf), sizeof ls64); |
| 593 | } else { |
| 594 | bsd_to_linux_shmid_ds(&bs, &ls); |
| 595 | error = copyout(&ls, SCARG(uap, buf), sizeof ls); |
| 596 | } |
| 597 | return error; |
| 598 | |
| 599 | case LINUX_IPC_SET: |
| 600 | if (cmd & LINUX_IPC_64) { |
| 601 | error = copyin(SCARG(uap, buf), &ls64, sizeof ls64); |
| 602 | linux_to_bsd_shmid64_ds(&ls64, &bs); |
| 603 | } else { |
| 604 | error = copyin(SCARG(uap, buf), &ls, sizeof ls); |
| 605 | linux_to_bsd_shmid_ds(&ls, &bs); |
| 606 | } |
| 607 | if (error != 0) |
| 608 | return error; |
| 609 | return shmctl1(l, shmid, IPC_SET, &bs); |
| 610 | |
| 611 | case LINUX_IPC_RMID: |
| 612 | return shmctl1(l, shmid, IPC_RMID, NULL); |
| 613 | |
| 614 | case LINUX_SHM_LOCK: |
| 615 | return shmctl1(l, shmid, SHM_LOCK, NULL); |
| 616 | |
| 617 | case LINUX_SHM_UNLOCK: |
| 618 | return shmctl1(l, shmid, SHM_UNLOCK, NULL); |
| 619 | |
| 620 | case LINUX_IPC_INFO: |
| 621 | memset(&lsi64, 0, sizeof lsi64); |
| 622 | lsi64.l_shmmax = shminfo.shmmax; |
| 623 | lsi64.l_shmmin = shminfo.shmmin; |
| 624 | lsi64.l_shmmni = shminfo.shmmni; |
| 625 | lsi64.l_shmseg = shminfo.shmseg; |
| 626 | lsi64.l_shmall = shminfo.shmall; |
| 627 | for (i = shminfo.shmmni - 1; i > 0; i--) |
| 628 | if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED) |
| 629 | break; |
| 630 | retval[0] = i; |
| 631 | return copyout(&lsi64, SCARG(uap, buf), sizeof lsi64); |
| 632 | |
| 633 | case LINUX_SHM_INFO: |
| 634 | (void)memset(&lsi, 0, sizeof lsi); |
| 635 | lsi.l_used_ids = shm_nused; |
| 636 | for (i = 0; i < shminfo.shmmni; i++) |
| 637 | if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED) |
| 638 | lsi.l_shm_tot += |
| 639 | round_page(shmsegs[i].shm_segsz) / |
| 640 | uvmexp.pagesize; |
| 641 | lsi.l_shm_rss = 0; |
| 642 | lsi.l_shm_swp = 0; |
| 643 | lsi.l_swap_attempts = 0; |
| 644 | lsi.l_swap_successes = 0; |
| 645 | for (i = shminfo.shmmni - 1; i > 0; i--) |
| 646 | if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED) |
| 647 | break; |
| 648 | retval[0] = i; |
| 649 | return copyout(&lsi, SCARG(uap, buf), sizeof lsi); |
| 650 | |
| 651 | default: |
| 652 | #ifdef DEBUG |
| 653 | printf("linux_sys_shmctl cmd %d\n" , SCARG(uap, cmd)); |
| 654 | #endif |
| 655 | return EINVAL; |
| 656 | } |
| 657 | } |
| 658 | #endif /* SYSVSHM */ |
| 659 | |