1 /* $OpenBSD: linux_ipc.c,v 1.9 2003/10/12 23:44:39 millert Exp $ */
2 /* $NetBSD: linux_ipc.c,v 1.10 1996/04/05 00:01:44 christos Exp $ */
3
4 /*
5 * Copyright (c) 1995 Frank van der Linden
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed for the NetBSD Project
19 * by Frank van der Linden
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/types.h>
36 #include <sys/param.h>
37 #include <sys/kernel.h>
38 #include <sys/shm.h>
39 #include <sys/sem.h>
40 #include <sys/msg.h>
41 #include <sys/proc.h>
42 #include <sys/uio.h>
43 #include <sys/time.h>
44 #include <sys/malloc.h>
45 #include <sys/mman.h>
46 #include <sys/systm.h>
47 #include <sys/stat.h>
48
49 #include <sys/mount.h>
50 #include <sys/syscallargs.h>
51
52 #include <compat/linux/linux_types.h>
53 #include <compat/linux/linux_signal.h>
54 #include <compat/linux/linux_syscallargs.h>
55 #include <compat/linux/linux_util.h>
56 #include <compat/linux/linux_ipc.h>
57 #include <compat/linux/linux_msg.h>
58 #include <compat/linux/linux_shm.h>
59 #include <compat/linux/linux_sem.h>
60 #include <compat/linux/linux_ipccall.h>
61
62 /*
63 * Stuff to deal with the SysV ipc/shm/semaphore interface in Linux.
64 * The main difference is, that Linux handles it all via one
65 * system call, which has the usual maximum amount of 5 arguments.
66 * This results in a kludge for calls that take 6 of them.
67 *
68 * The SYSVXXXX options have to be enabled to get the appropriate
69 * functions to work.
70 */
71
72 #ifdef SYSVSEM
73 int linux_semop(struct proc *, void *, register_t *);
74 int linux_semget(struct proc *, void *, register_t *);
75 int linux_semctl(struct proc *, void *, register_t *);
76 void bsd_to_linux_semid_ds(struct semid_ds *, struct linux_semid_ds *);
77 void linux_to_bsd_semid_ds(struct linux_semid_ds *, struct semid_ds *);
78 #endif
79
80 #ifdef SYSVMSG
81 int linux_msgsnd(struct proc *, void *, register_t *);
82 int linux_msgrcv(struct proc *, void *, register_t *);
83 int linux_msgget(struct proc *, void *, register_t *);
84 int linux_msgctl(struct proc *, void *, register_t *);
85 void linux_to_bsd_msqid_ds(struct linux_msqid_ds *, struct msqid_ds *);
86 void bsd_to_linux_msqid_ds(struct msqid_ds *, struct linux_msqid_ds *);
87 #endif
88
89 #ifdef SYSVSHM
90 int linux_shmat(struct proc *, void *, register_t *);
91 int linux_shmdt(struct proc *, void *, register_t *);
92 int linux_shmget(struct proc *, void *, register_t *);
93 int linux_shmctl(struct proc *, void *, register_t *);
94 void linux_to_bsd_shmid_ds(struct linux_shmid_ds *, struct shmid_ds *);
95 void bsd_to_linux_shmid_ds(struct shmid_ds *, struct linux_shmid_ds *);
96 #endif
97
98 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM)
99 void linux_to_bsd_ipc_perm(struct linux_ipc_perm *, struct ipc_perm *);
100 void bsd_to_linux_ipc_perm(struct ipc_perm *, struct linux_ipc_perm *);
101 #endif
102
103 int
linux_sys_ipc(p,v,retval)104 linux_sys_ipc(p, v, retval)
105 struct proc *p;
106 void *v;
107 register_t *retval;
108 {
109 struct linux_sys_ipc_args /* {
110 syscallarg(int) what;
111 syscallarg(int) a1;
112 syscallarg(int) a2;
113 syscallarg(int) a3;
114 syscallarg(caddr_t) ptr;
115 } */ *uap = v;
116
117 switch (SCARG(uap, what)) {
118 #ifdef SYSVSEM
119 case LINUX_SYS_semop:
120 return linux_semop(p, uap, retval);
121 case LINUX_SYS_semget:
122 return linux_semget(p, uap, retval);
123 case LINUX_SYS_semctl:
124 return linux_semctl(p, uap, retval);
125 #endif
126 #ifdef SYSVMSG
127 case LINUX_SYS_msgsnd:
128 return linux_msgsnd(p, uap, retval);
129 case LINUX_SYS_msgrcv:
130 return linux_msgrcv(p, uap, retval);
131 case LINUX_SYS_msgget:
132 return linux_msgget(p, uap, retval);
133 case LINUX_SYS_msgctl:
134 return linux_msgctl(p, uap, retval);
135 #endif
136 #ifdef SYSVSHM
137 case LINUX_SYS_shmat:
138 return linux_shmat(p, uap, retval);
139 case LINUX_SYS_shmdt:
140 return linux_shmdt(p, uap, retval);
141 case LINUX_SYS_shmget:
142 return linux_shmget(p, uap, retval);
143 case LINUX_SYS_shmctl:
144 return linux_shmctl(p, uap, retval);
145 #endif
146 default:
147 return ENOSYS;
148 }
149 }
150
151 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM)
152 /*
153 * Convert between Linux and OpenBSD ipc_perm structures. Only the
154 * order of the fields is different.
155 */
156 void
linux_to_bsd_ipc_perm(lpp,bpp)157 linux_to_bsd_ipc_perm(lpp, bpp)
158 struct linux_ipc_perm *lpp;
159 struct ipc_perm *bpp;
160 {
161
162 bpp->key = lpp->l_key;
163 bpp->uid = lpp->l_uid;
164 bpp->gid = lpp->l_gid;
165 bpp->cuid = lpp->l_cuid;
166 bpp->cgid = lpp->l_cgid;
167 bpp->mode = lpp->l_mode;
168 bpp->seq = lpp->l_seq;
169 }
170
171 void
bsd_to_linux_ipc_perm(bpp,lpp)172 bsd_to_linux_ipc_perm(bpp, lpp)
173 struct ipc_perm *bpp;
174 struct linux_ipc_perm *lpp;
175 {
176
177 lpp->l_key = bpp->key;
178 lpp->l_uid = bpp->uid;
179 lpp->l_gid = bpp->gid;
180 lpp->l_cuid = bpp->cuid;
181 lpp->l_cgid = bpp->cgid;
182 lpp->l_mode = bpp->mode;
183 lpp->l_seq = bpp->seq;
184 }
185 #endif
186
187 #ifdef SYSVSEM
188 /*
189 * Semaphore operations. Most constants and structures are the same on
190 * both systems. Only semctl() needs some extra work.
191 */
192
193 /*
194 * Convert between Linux and OpenBSD semid_ds structures.
195 */
196 void
bsd_to_linux_semid_ds(bs,ls)197 bsd_to_linux_semid_ds(bs, ls)
198 struct semid_ds *bs;
199 struct linux_semid_ds *ls;
200 {
201
202 bsd_to_linux_ipc_perm(&bs->sem_perm, &ls->l_sem_perm);
203 ls->l_sem_otime = bs->sem_otime;
204 ls->l_sem_ctime = bs->sem_ctime;
205 ls->l_sem_nsems = bs->sem_nsems;
206 ls->l_sem_base = bs->sem_base;
207 }
208
209 void
linux_to_bsd_semid_ds(ls,bs)210 linux_to_bsd_semid_ds(ls, bs)
211 struct linux_semid_ds *ls;
212 struct semid_ds *bs;
213 {
214
215 linux_to_bsd_ipc_perm(&ls->l_sem_perm, &bs->sem_perm);
216 bs->sem_otime = ls->l_sem_otime;
217 bs->sem_ctime = ls->l_sem_ctime;
218 bs->sem_nsems = ls->l_sem_nsems;
219 bs->sem_base = ls->l_sem_base;
220 }
221
222 int
linux_semop(p,v,retval)223 linux_semop(p, v, retval)
224 struct proc *p;
225 void *v;
226 register_t *retval;
227 {
228 struct linux_sys_ipc_args /* {
229 syscallarg(int) what;
230 syscallarg(int) a1;
231 syscallarg(int) a2;
232 syscallarg(int) a3;
233 syscallarg(caddr_t) ptr;
234 } */ *uap = v;
235 struct sys_semop_args bsa;
236
237 SCARG(&bsa, semid) = SCARG(uap, a1);
238 SCARG(&bsa, sops) = (struct sembuf *)SCARG(uap, ptr);
239 SCARG(&bsa, nsops) = SCARG(uap, a2);
240
241 return sys_semop(p, &bsa, retval);
242 }
243
244 int
linux_semget(p,v,retval)245 linux_semget(p, v, retval)
246 struct proc *p;
247 void *v;
248 register_t *retval;
249 {
250 struct linux_sys_ipc_args /* {
251 syscallarg(int) what;
252 syscallarg(int) a1;
253 syscallarg(int) a2;
254 syscallarg(int) a3;
255 syscallarg(caddr_t) ptr;
256 } */ *uap = v;
257 struct sys_semget_args bsa;
258
259 SCARG(&bsa, key) = (key_t)SCARG(uap, a1);
260 SCARG(&bsa, nsems) = SCARG(uap, a2);
261 SCARG(&bsa, semflg) = SCARG(uap, a3);
262
263 return sys_semget(p, &bsa, retval);
264 }
265
266 /*
267 * Most of this can be handled by directly passing the arguments on,
268 * buf IPC_* require a lot of copy{in,out} because of the extra indirection
269 * (we are passed a pointer to a union cointaining a pointer to a semid_ds
270 * structure.
271 */
272 int
linux_semctl(p,v,retval)273 linux_semctl(p, v, retval)
274 struct proc *p;
275 void *v;
276 register_t *retval;
277 {
278 struct linux_sys_ipc_args /* {
279 syscallarg(int) what;
280 syscallarg(int) a1;
281 syscallarg(int) a2;
282 syscallarg(int) a3;
283 syscallarg(caddr_t) ptr;
284 } */ *uap = v;
285 caddr_t sg, unptr, dsp, ldsp;
286 int error, cmd;
287 struct sys___semctl_args bsa;
288 struct linux_semid_ds lm;
289 struct semid_ds bm;
290
291 SCARG(&bsa, semid) = SCARG(uap, a1);
292 SCARG(&bsa, semnum) = SCARG(uap, a2);
293 SCARG(&bsa, cmd) = SCARG(uap, a3);
294 SCARG(&bsa, arg) = (union semun *)SCARG(uap, ptr);
295 switch(SCARG(uap, a3)) {
296 case LINUX_GETVAL:
297 cmd = GETVAL;
298 break;
299 case LINUX_GETPID:
300 cmd = GETPID;
301 break;
302 case LINUX_GETNCNT:
303 cmd = GETNCNT;
304 break;
305 case LINUX_GETZCNT:
306 cmd = GETZCNT;
307 break;
308 case LINUX_SETVAL:
309 cmd = SETVAL;
310 break;
311 case LINUX_IPC_RMID:
312 cmd = IPC_RMID;
313 break;
314 case LINUX_IPC_SET:
315 if ((error = copyin(SCARG(uap, ptr), &ldsp, sizeof ldsp)))
316 return error;
317 if ((error = copyin(ldsp, (caddr_t)&lm, sizeof lm)))
318 return error;
319 linux_to_bsd_semid_ds(&lm, &bm);
320 sg = stackgap_init(p->p_emul);
321 unptr = stackgap_alloc(&sg, sizeof (union semun));
322 dsp = stackgap_alloc(&sg, sizeof (struct semid_ds));
323 if ((error = copyout((caddr_t)&bm, dsp, sizeof bm)))
324 return error;
325 if ((error = copyout((caddr_t)&dsp, unptr, sizeof dsp)))
326 return error;
327 SCARG(&bsa, arg) = (union semun *)unptr;
328 return sys___semctl(p, &bsa, retval);
329 case LINUX_IPC_STAT:
330 sg = stackgap_init(p->p_emul);
331 unptr = stackgap_alloc(&sg, sizeof (union semun *));
332 dsp = stackgap_alloc(&sg, sizeof (struct semid_ds));
333 if ((error = copyout((caddr_t)&dsp, unptr, sizeof dsp)))
334 return error;
335 SCARG(&bsa, arg) = (union semun *)unptr;
336 if ((error = sys___semctl(p, &bsa, retval)))
337 return error;
338 if ((error = copyin(dsp, (caddr_t)&bm, sizeof bm)))
339 return error;
340 bsd_to_linux_semid_ds(&bm, &lm);
341 if ((error = copyin(SCARG(uap, ptr), &ldsp, sizeof ldsp)))
342 return error;
343 return copyout((caddr_t)&lm, ldsp, sizeof lm);
344 default:
345 return EINVAL;
346 }
347 SCARG(&bsa, cmd) = cmd;
348
349 return sys___semctl(p, &bsa, retval);
350 }
351 #endif /* SYSVSEM */
352
353 #ifdef SYSVMSG
354
355 void
linux_to_bsd_msqid_ds(lmp,bmp)356 linux_to_bsd_msqid_ds(lmp, bmp)
357 struct linux_msqid_ds *lmp;
358 struct msqid_ds *bmp;
359 {
360
361 linux_to_bsd_ipc_perm(&lmp->l_msg_perm, &bmp->msg_perm);
362 bmp->msg_first = lmp->l_msg_first;
363 bmp->msg_last = lmp->l_msg_last;
364 bmp->msg_cbytes = lmp->l_msg_cbytes;
365 bmp->msg_qnum = lmp->l_msg_qnum;
366 bmp->msg_qbytes = lmp->l_msg_qbytes;
367 bmp->msg_lspid = lmp->l_msg_lspid;
368 bmp->msg_lrpid = lmp->l_msg_lrpid;
369 bmp->msg_stime = lmp->l_msg_stime;
370 bmp->msg_rtime = lmp->l_msg_rtime;
371 bmp->msg_ctime = lmp->l_msg_ctime;
372 }
373
374 void
bsd_to_linux_msqid_ds(bmp,lmp)375 bsd_to_linux_msqid_ds(bmp, lmp)
376 struct msqid_ds *bmp;
377 struct linux_msqid_ds *lmp;
378 {
379
380 bsd_to_linux_ipc_perm(&bmp->msg_perm, &lmp->l_msg_perm);
381 lmp->l_msg_first = bmp->msg_first;
382 lmp->l_msg_last = bmp->msg_last;
383 lmp->l_msg_cbytes = bmp->msg_cbytes;
384 lmp->l_msg_qnum = bmp->msg_qnum;
385 lmp->l_msg_qbytes = bmp->msg_qbytes;
386 lmp->l_msg_lspid = bmp->msg_lspid;
387 lmp->l_msg_lrpid = bmp->msg_lrpid;
388 lmp->l_msg_stime = bmp->msg_stime;
389 lmp->l_msg_rtime = bmp->msg_rtime;
390 lmp->l_msg_ctime = bmp->msg_ctime;
391 }
392
393 int
linux_msgsnd(p,v,retval)394 linux_msgsnd(p, v, retval)
395 struct proc *p;
396 void *v;
397 register_t *retval;
398 {
399 struct linux_sys_ipc_args /* {
400 syscallarg(int) what;
401 syscallarg(int) a1;
402 syscallarg(int) a2;
403 syscallarg(int) a3;
404 syscallarg(caddr_t) ptr;
405 } */ *uap = v;
406 struct sys_msgsnd_args bma;
407
408 SCARG(&bma, msqid) = SCARG(uap, a1);
409 SCARG(&bma, msgp) = SCARG(uap, ptr);
410 SCARG(&bma, msgsz) = SCARG(uap, a2);
411 SCARG(&bma, msgflg) = SCARG(uap, a3);
412
413 return sys_msgsnd(p, &bma, retval);
414 }
415
416 int
linux_msgrcv(p,v,retval)417 linux_msgrcv(p, v, retval)
418 struct proc *p;
419 void *v;
420 register_t *retval;
421 {
422 struct linux_sys_ipc_args /* {
423 syscallarg(int) what;
424 syscallarg(int) a1;
425 syscallarg(int) a2;
426 syscallarg(int) a3;
427 syscallarg(caddr_t) ptr;
428 } */ *uap = v;
429 struct sys_msgrcv_args bma;
430 struct linux_msgrcv_msgarg kluge;
431 int error;
432
433 if ((error = copyin(SCARG(uap, ptr), &kluge, sizeof kluge)))
434 return error;
435
436 SCARG(&bma, msqid) = SCARG(uap, a1);
437 SCARG(&bma, msgp) = kluge.msg;
438 SCARG(&bma, msgsz) = SCARG(uap, a2);
439 SCARG(&bma, msgtyp) = kluge.type;
440 SCARG(&bma, msgflg) = SCARG(uap, a3);
441
442 return sys_msgrcv(p, &bma, retval);
443 }
444
445 int
linux_msgget(p,v,retval)446 linux_msgget(p, v, retval)
447 struct proc *p;
448 void *v;
449 register_t *retval;
450 {
451 struct linux_sys_ipc_args /* {
452 syscallarg(int) what;
453 syscallarg(int) a1;
454 syscallarg(int) a2;
455 syscallarg(int) a3;
456 syscallarg(caddr_t) ptr;
457 } */ *uap = v;
458 struct sys_msgget_args bma;
459
460 SCARG(&bma, key) = (key_t)SCARG(uap, a1);
461 SCARG(&bma, msgflg) = SCARG(uap, a2);
462
463 return sys_msgget(p, &bma, retval);
464 }
465
466 int
linux_msgctl(p,v,retval)467 linux_msgctl(p, v, retval)
468 struct proc *p;
469 void *v;
470 register_t *retval;
471 {
472 struct linux_sys_ipc_args /* {
473 syscallarg(int) what;
474 syscallarg(int) a1;
475 syscallarg(int) a2;
476 syscallarg(int) a3;
477 syscallarg(caddr_t) ptr;
478 } */ *uap = v;
479 struct sys_msgctl_args bma;
480 caddr_t umsgptr, sg;
481 struct linux_msqid_ds lm;
482 struct msqid_ds bm;
483 int error;
484
485 SCARG(&bma, msqid) = SCARG(uap, a1);
486 SCARG(&bma, cmd) = SCARG(uap, a2);
487 switch (SCARG(uap, a2)) {
488 case LINUX_IPC_RMID:
489 return sys_msgctl(p, &bma, retval);
490 case LINUX_IPC_SET:
491 if ((error = copyin(SCARG(uap, ptr), (caddr_t)&lm, sizeof lm)))
492 return error;
493 linux_to_bsd_msqid_ds(&lm, &bm);
494 sg = stackgap_init(p->p_emul);
495 umsgptr = stackgap_alloc(&sg, sizeof bm);
496 if ((error = copyout((caddr_t)&bm, umsgptr, sizeof bm)))
497 return error;
498 SCARG(&bma, buf) = (struct msqid_ds *)umsgptr;
499 return sys_msgctl(p, &bma, retval);
500 case LINUX_IPC_STAT:
501 sg = stackgap_init(p->p_emul);
502 umsgptr = stackgap_alloc(&sg, sizeof (struct msqid_ds));
503 SCARG(&bma, buf) = (struct msqid_ds *)umsgptr;
504 if ((error = sys_msgctl(p, &bma, retval)))
505 return error;
506 if ((error = copyin(umsgptr, (caddr_t)&bm, sizeof bm)))
507 return error;
508 bsd_to_linux_msqid_ds(&bm, &lm);
509 return copyout((caddr_t)&lm, SCARG(uap, ptr), sizeof lm);
510 }
511 return EINVAL;
512 }
513 #endif /* SYSVMSG */
514
515 #ifdef SYSVSHM
516 /*
517 * shmat(2). Very straightforward, except that Linux passes a pointer
518 * in which the return value is to be passed. This is subsequently
519 * handled by libc, apparently.
520 */
521 int
linux_shmat(p,v,retval)522 linux_shmat(p, v, retval)
523 struct proc *p;
524 void *v;
525 register_t *retval;
526 {
527 struct linux_sys_ipc_args /* {
528 syscallarg(int) what;
529 syscallarg(int) a1;
530 syscallarg(int) a2;
531 syscallarg(int) a3;
532 syscallarg(caddr_t) ptr;
533 } */ *uap = v;
534 struct sys_shmat_args bsa;
535 int error;
536
537 SCARG(&bsa, shmid) = SCARG(uap, a1);
538 SCARG(&bsa, shmaddr) = SCARG(uap, ptr);
539 SCARG(&bsa, shmflg) = SCARG(uap, a2);
540
541 if ((error = sys_shmat1(p, &bsa, retval, 1)))
542 return error;
543
544 if ((error = copyout(&retval[0], (caddr_t) SCARG(uap, a3),
545 sizeof retval[0])))
546 return error;
547
548 retval[0] = 0;
549 return 0;
550 }
551
552 /*
553 * shmdt(): this could have been mapped directly, if it wasn't for
554 * the extra indirection by the linux_ipc system call.
555 */
556 int
linux_shmdt(p,v,retval)557 linux_shmdt(p, v, retval)
558 struct proc *p;
559 void *v;
560 register_t *retval;
561 {
562 struct linux_sys_ipc_args /* {
563 syscallarg(int) what;
564 syscallarg(int) a1;
565 syscallarg(int) a2;
566 syscallarg(int) a3;
567 syscallarg(caddr_t) ptr;
568 } */ *uap = v;
569 struct sys_shmdt_args bsa;
570
571 SCARG(&bsa, shmaddr) = SCARG(uap, ptr);
572
573 return sys_shmdt(p, &bsa, retval);
574 }
575
576 /*
577 * Same story as shmdt.
578 */
579 int
linux_shmget(p,v,retval)580 linux_shmget(p, v, retval)
581 struct proc *p;
582 void *v;
583 register_t *retval;
584 {
585 struct linux_sys_ipc_args /* {
586 syscallarg(int) what;
587 syscallarg(int) a1;
588 syscallarg(int) a2;
589 syscallarg(int) a3;
590 syscallarg(caddr_t) ptr;
591 } */ *uap = v;
592 struct sys_shmget_args bsa;
593
594 SCARG(&bsa, key) = SCARG(uap, a1);
595 SCARG(&bsa, size) = SCARG(uap, a2);
596 SCARG(&bsa, shmflg) = SCARG(uap, a3);
597
598 return sys_shmget(p, &bsa, retval);
599 }
600
601 /*
602 * Convert between Linux and OpenBSD shmid_ds structures.
603 * The order of the fields is once again the difference, and
604 * we also need a place to store the internal data pointer
605 * in, which is unfortunately stored in this structure.
606 *
607 * We abuse a Linux internal field for that.
608 */
609 void
linux_to_bsd_shmid_ds(lsp,bsp)610 linux_to_bsd_shmid_ds(lsp, bsp)
611 struct linux_shmid_ds *lsp;
612 struct shmid_ds *bsp;
613 {
614
615 linux_to_bsd_ipc_perm(&lsp->l_shm_perm, &bsp->shm_perm);
616 bsp->shm_segsz = lsp->l_shm_segsz;
617 bsp->shm_lpid = lsp->l_shm_lpid;
618 bsp->shm_cpid = lsp->l_shm_cpid;
619 bsp->shm_nattch = lsp->l_shm_nattch;
620 bsp->shm_atime = lsp->l_shm_atime;
621 bsp->shm_dtime = lsp->l_shm_dtime;
622 bsp->shm_ctime = lsp->l_shm_ctime;
623 bsp->shm_internal = lsp->l_private2; /* XXX Oh well. */
624 }
625
626 void
bsd_to_linux_shmid_ds(bsp,lsp)627 bsd_to_linux_shmid_ds(bsp, lsp)
628 struct shmid_ds *bsp;
629 struct linux_shmid_ds *lsp;
630 {
631
632 bsd_to_linux_ipc_perm(&bsp->shm_perm, &lsp->l_shm_perm);
633 lsp->l_shm_segsz = bsp->shm_segsz;
634 lsp->l_shm_lpid = bsp->shm_lpid;
635 lsp->l_shm_cpid = bsp->shm_cpid;
636 lsp->l_shm_nattch = bsp->shm_nattch;
637 lsp->l_shm_atime = bsp->shm_atime;
638 lsp->l_shm_dtime = bsp->shm_dtime;
639 lsp->l_shm_ctime = bsp->shm_ctime;
640 lsp->l_private2 = bsp->shm_internal; /* XXX */
641 }
642
643 /*
644 * shmctl. Not implemented (for now): IPC_INFO, SHM_INFO, SHM_STAT
645 * SHM_LOCK and SHM_UNLOCK are passed on, but currently not implemented
646 * by OpenBSD itself.
647 *
648 * The usual structure conversion and massaging is done.
649 */
650 int
linux_shmctl(p,v,retval)651 linux_shmctl(p, v, retval)
652 struct proc *p;
653 void *v;
654 register_t *retval;
655 {
656 struct linux_sys_ipc_args /* {
657 syscallarg(int) what;
658 syscallarg(int) a1;
659 syscallarg(int) a2;
660 syscallarg(int) a3;
661 syscallarg(caddr_t) ptr;
662 } */ *uap = v;
663 int error;
664 caddr_t sg;
665 struct sys_shmctl_args bsa;
666 struct shmid_ds *bsp, bs;
667 struct linux_shmid_ds lseg;
668
669 switch (SCARG(uap, a2)) {
670 case LINUX_IPC_STAT:
671 sg = stackgap_init(p->p_emul);
672 bsp = stackgap_alloc(&sg, sizeof (struct shmid_ds));
673 SCARG(&bsa, shmid) = SCARG(uap, a1);
674 SCARG(&bsa, cmd) = IPC_STAT;
675 SCARG(&bsa, buf) = bsp;
676 if ((error = sys_shmctl(p, &bsa, retval)))
677 return error;
678 if ((error = copyin((caddr_t) bsp, (caddr_t) &bs, sizeof bs)))
679 return error;
680 bsd_to_linux_shmid_ds(&bs, &lseg);
681 return copyout((caddr_t) &lseg, SCARG(uap, ptr), sizeof lseg);
682 case LINUX_IPC_SET:
683 if ((error = copyin(SCARG(uap, ptr), (caddr_t) &lseg,
684 sizeof lseg)))
685 return error;
686 linux_to_bsd_shmid_ds(&lseg, &bs);
687 sg = stackgap_init(p->p_emul);
688 bsp = stackgap_alloc(&sg, sizeof (struct shmid_ds));
689 if ((error = copyout((caddr_t) &bs, (caddr_t) bsp, sizeof bs)))
690 return error;
691 SCARG(&bsa, shmid) = SCARG(uap, a1);
692 SCARG(&bsa, cmd) = IPC_SET;
693 SCARG(&bsa, buf) = bsp;
694 return sys_shmctl(p, &bsa, retval);
695 case LINUX_IPC_RMID:
696 case LINUX_SHM_LOCK:
697 case LINUX_SHM_UNLOCK:
698 SCARG(&bsa, shmid) = SCARG(uap, a1);
699 switch (SCARG(uap, a2)) {
700 case LINUX_IPC_RMID:
701 SCARG(&bsa, cmd) = IPC_RMID;
702 break;
703 case LINUX_SHM_LOCK:
704 SCARG(&bsa, cmd) = SHM_LOCK;
705 break;
706 case LINUX_SHM_UNLOCK:
707 SCARG(&bsa, cmd) = SHM_UNLOCK;
708 break;
709 }
710 SCARG(&bsa, buf) = NULL;
711 return sys_shmctl(p, &bsa, retval);
712 case LINUX_IPC_INFO:
713 case LINUX_SHM_STAT:
714 case LINUX_SHM_INFO:
715 default:
716 return EINVAL;
717 }
718 }
719 #endif /* SYSVSHM */
720