1 /* $NetBSD: linux_ipc.c,v 1.51 2008/05/21 11:15:57 njoly 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 1.51 2008/05/21 11:15:57 njoly 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 * liunx_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 if (lcmd == LINUX_IPC_STAT || lcmd == LINUX_IPC_SET)
213 lcmd |= LINUX_IPC_64;
214 #endif
215
216 switch (lcmd) {
217 case LINUX_IPC_SET:
218 error = copyin(SCARG(uap, arg).l_buf, &lsembuf,
219 sizeof(lsembuf));
220 if (error)
221 return (error);
222 linux_to_bsd_semid_ds(&lsembuf, &sembuf);
223 pass_arg = &sembuf;
224 cmd = IPC_SET;
225 break;
226
227 case LINUX_IPC_SET | LINUX_IPC_64:
228 error = copyin(SCARG(uap, arg).l_buf, &lsembuf64,
229 sizeof(lsembuf64));
230 if (error)
231 return (error);
232 linux_to_bsd_semid64_ds(&lsembuf64, &sembuf);
233 pass_arg = &sembuf;
234 cmd = IPC_SET;
235 break;
236
237 case LINUX_IPC_STAT:
238 case LINUX_IPC_STAT | LINUX_IPC_64:
239 pass_arg = &sembuf;
240 cmd = IPC_STAT;
241 break;
242
243 case LINUX_IPC_RMID:
244 cmd = IPC_RMID;
245 break;
246
247 case LINUX_GETVAL:
248 cmd = GETVAL;
249 break;
250
251 case LINUX_GETPID:
252 cmd = GETPID;
253 break;
254
255 case LINUX_GETNCNT:
256 cmd = GETNCNT;
257 break;
258
259 case LINUX_GETZCNT:
260 cmd = GETZCNT;
261 break;
262
263 case LINUX_GETALL:
264 pass_arg = &semun;
265 semun.array = SCARG(uap, arg).l_array;
266 cmd = GETALL;
267 break;
268
269 case LINUX_SETVAL:
270 pass_arg = &semun;
271 semun.val = SCARG(uap, arg).l_val;
272 cmd = SETVAL;
273 break;
274
275 case LINUX_SETALL:
276 pass_arg = &semun;
277 semun.array = SCARG(uap, arg).l_array;
278 cmd = SETALL;
279 break;
280
281 default:
282 return (EINVAL);
283 }
284
285 error = semctl1(l, SCARG(uap, semid), SCARG(uap, semnum), cmd,
286 pass_arg, retval);
287 if (error)
288 return error;
289
290 switch (lcmd) {
291 case LINUX_IPC_STAT:
292 bsd_to_linux_semid_ds(&sembuf, &lsembuf);
293 error = copyout(&lsembuf, SCARG(uap, arg).l_buf,
294 sizeof(lsembuf));
295 break;
296 case LINUX_IPC_STAT | LINUX_IPC_64:
297 bsd_to_linux_semid64_ds(&sembuf, &lsembuf64);
298 error = copyout(&lsembuf64, SCARG(uap, arg).l_buf,
299 sizeof(lsembuf64));
300 break;
301 default:
302 break;
303 }
304
305 return (error);
306 }
307 #endif /* SYSVSEM */
308
309 #ifdef SYSVMSG
310
311 void
312 linux_to_bsd_msqid_ds(struct linux_msqid_ds *lmp, struct msqid_ds *bmp)
313 {
314
315 linux_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm);
316 bmp->_msg_first = lmp->l_msg_first;
317 bmp->_msg_last = lmp->l_msg_last;
318 bmp->_msg_cbytes = lmp->l_msg_cbytes;
319 bmp->msg_qnum = lmp->l_msg_qnum;
320 bmp->msg_qbytes = lmp->l_msg_qbytes;
321 bmp->msg_lspid = lmp->l_msg_lspid;
322 bmp->msg_lrpid = lmp->l_msg_lrpid;
323 bmp->msg_stime = lmp->l_msg_stime;
324 bmp->msg_rtime = lmp->l_msg_rtime;
325 bmp->msg_ctime = lmp->l_msg_ctime;
326 }
327
328 void
329 linux_to_bsd_msqid64_ds(struct linux_msqid64_ds *lmp, struct msqid_ds *bmp)
330 {
331 linux_to_bsd_ipc64_perm(&lmp->l_msg_perm, &bmp->msg_perm);
332 bmp->msg_stime = lmp->l_msg_stime;
333 bmp->msg_rtime = lmp->l_msg_rtime;
334 bmp->msg_ctime = lmp->l_msg_ctime;
335 bmp->_msg_cbytes = lmp->l_msg_cbytes;
336 bmp->msg_qnum = lmp->l_msg_qnum;
337 bmp->msg_qbytes = lmp->l_msg_qbytes;
338 bmp->msg_lspid = lmp->l_msg_lspid;
339 bmp->msg_lrpid = lmp->l_msg_lrpid;
340 }
341
342 void
343 bsd_to_linux_msqid_ds(struct msqid_ds *bmp, struct linux_msqid_ds *lmp)
344 {
345
346 bsd_to_linux_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm);
347 lmp->l_msg_first = bmp->_msg_first;
348 lmp->l_msg_last = bmp->_msg_last;
349 lmp->l_msg_cbytes = bmp->_msg_cbytes;
350 lmp->l_msg_qnum = bmp->msg_qnum;
351 lmp->l_msg_qbytes = bmp->msg_qbytes;
352 lmp->l_msg_lspid = bmp->msg_lspid;
353 lmp->l_msg_lrpid = bmp->msg_lrpid;
354 lmp->l_msg_stime = bmp->msg_stime;
355 lmp->l_msg_rtime = bmp->msg_rtime;
356 lmp->l_msg_ctime = bmp->msg_ctime;
357 }
358
359 void
360 bsd_to_linux_msqid64_ds(struct msqid_ds *bmp, struct linux_msqid64_ds *lmp)
361 {
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 if (lcmd == LINUX_IPC_STAT || lcmd == LINUX_IPC_SET)
389 lcmd |= LINUX_IPC_64;
390 #endif
391
392 switch (lcmd) {
393 case LINUX_IPC_STAT:
394 case LINUX_IPC_STAT|LINUX_IPC_64:
395 cmd = IPC_STAT;
396 bmp = &bm;
397 break;
398 case LINUX_IPC_SET:
399 if ((error = copyin(SCARG(uap, buf), &lm, sizeof lm)))
400 return error;
401 linux_to_bsd_msqid_ds(&lm, &bm);
402 cmd = IPC_SET;
403 bmp = &bm;
404 break;
405 case LINUX_IPC_SET|LINUX_IPC_64:
406 if ((error = copyin(SCARG(uap, buf), &lm64, sizeof lm64)))
407 return error;
408 linux_to_bsd_msqid64_ds(&lm64, &bm);
409 cmd = IPC_SET;
410 bmp = &bm;
411 break;
412 case LINUX_IPC_RMID:
413 cmd = IPC_RMID;
414 break;
415 default:
416 return EINVAL;
417 }
418
419 if ((error = msgctl1(l, SCARG(uap, msqid), cmd, bmp)))
420 return error;
421
422 switch (lcmd) {
423 case LINUX_IPC_STAT:
424 bsd_to_linux_msqid_ds(&bm, &lm);
425 error = copyout(&lm, SCARG(uap, buf), sizeof lm);
426 break;
427 case LINUX_IPC_STAT|LINUX_IPC_64:
428 bsd_to_linux_msqid64_ds(&bm, &lm64);
429 error = copyout(&lm64, SCARG(uap, buf), sizeof lm64);
430 break;
431 default:
432 break;
433 }
434
435 return error;
436 }
437 #endif /* SYSVMSG */
438
439 #ifdef SYSVSHM
440 /*
441 * shmget(2). Just make sure the Linux-compatible shmat() semantics
442 * is enabled for the segment, so that shmat() succeeds even when
443 * the segment would be removed.
444 */
445 int
446 linux_sys_shmget(struct lwp *l, const struct linux_sys_shmget_args *uap, register_t *retval)
447 {
448 /* {
449 syscallarg(key_t) key;
450 syscallarg(size_t) size;
451 syscallarg(int) shmflg;
452 } */
453 struct sys_shmget_args bsd_ua;
454
455 SCARG(&bsd_ua, key) = SCARG(uap, key);
456 SCARG(&bsd_ua, size) = SCARG(uap, size);
457 SCARG(&bsd_ua, shmflg) = SCARG(uap, shmflg) | _SHM_RMLINGER;
458
459 return sys_shmget(l, &bsd_ua, retval);
460 }
461
462 /*
463 * shmat(2). Very straightforward, except that Linux passes a pointer
464 * in which the return value is to be passed. This is subsequently
465 * handled by libc, apparently.
466 */
467 #ifndef __amd64__
468 int
469 linux_sys_shmat(struct lwp *l, const struct linux_sys_shmat_args *uap, register_t *retval)
470 {
471 /* {
472 syscallarg(int) shmid;
473 syscallarg(void *) shmaddr;
474 syscallarg(int) shmflg;
475 syscallarg(u_long *) raddr;
476 } */
477 int error;
478
479 if ((error = sys_shmat(l, (const void *)uap, retval)))
480 return error;
481
482 if ((error = copyout(&retval[0], SCARG(uap, raddr), sizeof retval[0])))
483 return error;
484
485 retval[0] = 0;
486 return 0;
487 }
488 #endif /* __amd64__ */
489
490 /*
491 * Convert between Linux and NetBSD shmid_ds structures.
492 * The order of the fields is once again the difference, and
493 * we also need a place to store the internal data pointer
494 * in, which is unfortunately stored in this structure.
495 *
496 * We abuse a Linux internal field for that.
497 */
498 void
499 linux_to_bsd_shmid_ds(struct linux_shmid_ds *lsp, struct shmid_ds *bsp)
500 {
501
502 linux_to_bsd_ipc_perm(&lsp->l_shm_perm, &bsp->shm_perm);
503 bsp->shm_segsz = lsp->l_shm_segsz;
504 bsp->shm_lpid = lsp->l_shm_lpid;
505 bsp->shm_cpid = lsp->l_shm_cpid;
506 bsp->shm_nattch = lsp->l_shm_nattch;
507 bsp->shm_atime = lsp->l_shm_atime;
508 bsp->shm_dtime = lsp->l_shm_dtime;
509 bsp->shm_ctime = lsp->l_shm_ctime;
510 bsp->_shm_internal = lsp->l_private2; /* XXX Oh well. */
511 }
512
513 void
514 linux_to_bsd_shmid64_ds(struct linux_shmid64_ds *lsp, struct shmid_ds *bsp)
515 {
516
517 linux_to_bsd_ipc64_perm(&lsp->l_shm_perm, &bsp->shm_perm);
518 bsp->shm_segsz = lsp->l_shm_segsz;
519 bsp->shm_lpid = lsp->l_shm_lpid;
520 bsp->shm_cpid = lsp->l_shm_cpid;
521 bsp->shm_nattch = lsp->l_shm_nattch;
522 bsp->shm_atime = lsp->l_shm_atime;
523 bsp->shm_dtime = lsp->l_shm_dtime;
524 bsp->shm_ctime = lsp->l_shm_ctime;
525 bsp->_shm_internal = (void*)lsp->l___unused5; /* XXX Oh well. */
526 }
527
528 void
529 bsd_to_linux_shmid_ds(struct shmid_ds *bsp, struct linux_shmid_ds *lsp)
530 {
531
532 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->l_shm_perm);
533 lsp->l_shm_segsz = bsp->shm_segsz;
534 lsp->l_shm_lpid = bsp->shm_lpid;
535 lsp->l_shm_cpid = bsp->shm_cpid;
536 lsp->l_shm_nattch = bsp->shm_nattch;
537 lsp->l_shm_atime = bsp->shm_atime;
538 lsp->l_shm_dtime = bsp->shm_dtime;
539 lsp->l_shm_ctime = bsp->shm_ctime;
540 lsp->l_private2 = bsp->_shm_internal; /* XXX */
541 }
542
543 void
544 bsd_to_linux_shmid64_ds(struct shmid_ds *bsp, struct linux_shmid64_ds *lsp)
545 {
546 bsd_to_linux_ipc64_perm(&bsp->shm_perm, &lsp->l_shm_perm);
547 lsp->l_shm_segsz = bsp->shm_segsz;
548 lsp->l_shm_lpid = bsp->shm_lpid;
549 lsp->l_shm_cpid = bsp->shm_cpid;
550 lsp->l_shm_nattch = bsp->shm_nattch;
551 lsp->l_shm_atime = bsp->shm_atime;
552 lsp->l_shm_dtime = bsp->shm_dtime;
553 lsp->l_shm_ctime = bsp->shm_ctime;
554 lsp->l___unused5 = (u_long)bsp->_shm_internal; /* XXX */
555 }
556
557 /*
558 * shmctl.
559 *
560 * The usual structure conversion and massaging is done.
561 */
562 int
563 linux_sys_shmctl(struct lwp *l, const struct linux_sys_shmctl_args *uap, register_t *retval)
564 {
565 /* {
566 syscallarg(int) shmid;
567 syscallarg(int) cmd;
568 syscallarg(struct linux_shmid_ds *) buf;
569 } */
570 struct shmid_ds bs;
571 struct linux_shmid_ds ls;
572 struct linux_shmid64_ds ls64;
573 struct linux_shminfo64 lsi64;
574 struct linux_shm_info lsi;
575 int error, i, cmd, shmid;
576
577 shmid = SCARG(uap, shmid);
578 cmd = SCARG(uap, cmd);
579 #ifdef LINUX_IPC_FORCE64
580 if (cmd == LINUX_IPC_STAT || cmd == LINUX_SHM_STAT ||
581 cmd == LINUX_IPC_SET)
582 cmd |= LINUX_IPC_64;
583 #endif
584
585 switch (cmd) {
586 case LINUX_IPC_STAT:
587 case LINUX_SHM_STAT:
588 if (cmd == LINUX_SHM_STAT) {
589 shmid = IXSEQ_TO_IPCID(shmid, shmsegs[shmid].shm_perm);
590 retval[0] = shmid;
591 }
592 error = shmctl1(l, shmid, IPC_STAT, &bs);
593 if (error != 0)
594 return error;
595 bsd_to_linux_shmid_ds(&bs, &ls);
596 return copyout(&ls, SCARG(uap, buf), sizeof ls);
597
598 case LINUX_IPC_STAT | LINUX_IPC_64:
599 case LINUX_SHM_STAT | LINUX_IPC_64:
600 if (cmd == (LINUX_SHM_STAT | LINUX_IPC_64)) {
601 shmid = IXSEQ_TO_IPCID(shmid, shmsegs[shmid].shm_perm);
602 retval[0] = shmid;
603 }
604 error = shmctl1(l, shmid, IPC_STAT, &bs);
605 if (error != 0)
606 return error;
607 bsd_to_linux_shmid64_ds(&bs, &ls64);
608 return copyout(&ls64, SCARG(uap, buf), sizeof ls64);
609
610 case LINUX_IPC_SET:
611 if ((error = copyin(SCARG(uap, buf), &ls, sizeof ls)))
612 return error;
613 linux_to_bsd_shmid_ds(&ls, &bs);
614 return shmctl1(l, shmid, IPC_SET, &bs);
615
616 case LINUX_IPC_SET | LINUX_IPC_64:
617 if ((error = copyin(SCARG(uap, buf), &ls64, sizeof ls64)))
618 return error;
619 linux_to_bsd_shmid64_ds(&ls64, &bs);
620 return shmctl1(l, shmid, IPC_SET, &bs);
621
622 case LINUX_IPC_RMID:
623 return shmctl1(l, shmid, IPC_RMID, NULL);
624
625 case LINUX_SHM_LOCK:
626 return shmctl1(l, shmid, SHM_LOCK, NULL);
627
628 case LINUX_SHM_UNLOCK:
629 return shmctl1(l, shmid, SHM_UNLOCK, NULL);
630
631 case LINUX_IPC_INFO:
632 memset(&lsi64, 0, sizeof lsi64);
633 lsi64.l_shmmax = shminfo.shmmax;
634 lsi64.l_shmmin = shminfo.shmmin;
635 lsi64.l_shmmni = shminfo.shmmni;
636 lsi64.l_shmseg = shminfo.shmseg;
637 lsi64.l_shmall = shminfo.shmall;
638 for (i = shminfo.shmmni - 1; i > 0; i--)
639 if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED)
640 break;
641 retval[0] = i;
642 return copyout(&lsi64, SCARG(uap, buf), sizeof lsi64);
643
644 case LINUX_SHM_INFO:
645 (void)memset(&lsi, 0, sizeof lsi);
646 lsi.l_used_ids = shm_nused;
647 for (i = 0; i < shminfo.shmmni; i++)
648 if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED)
649 lsi.l_shm_tot +=
650 round_page(shmsegs[i].shm_segsz) /
651 uvmexp.pagesize;
652 lsi.l_shm_rss = 0;
653 lsi.l_shm_swp = 0;
654 lsi.l_swap_attempts = 0;
655 lsi.l_swap_successes = 0;
656 for (i = shminfo.shmmni - 1; i > 0; i--)
657 if (shmsegs[i].shm_perm.mode & SHMSEG_ALLOCATED)
658 break;
659 retval[0] = i;
660 return copyout(&lsi, SCARG(uap, buf), sizeof lsi);
661
662 default:
663 #ifdef DEBUG
664 printf("linux_sys_shmctl cmd %d\n", SCARG(uap, cmd));
665 #endif
666 return EINVAL;
667 }
668 }
669 #endif /* SYSVSHM */
Cache object: ea45774cf47e6cac46416e75cd18c40a
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