ia64/linux-2.6.18-xen.hg

view ipc/compat.c @ 563:3b3701ad4eec

pvSCSI frontend driver

Signed-off-by: Tomonari Horikoshi <t.horikoshi@jp.fujitsu.com>
Signed-off-by: Jun Kamada <kama@jp.fujitsu.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Jun 02 09:58:56 2008 +0100 (2008-06-02)
parents 831230e53067
children
line source
1 /*
2 * 32 bit compatibility code for System V IPC
3 *
4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 2000 VA Linux Co
8 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
11 * Copyright (C) 2000 Gerhard Tonn (ton@de.ibm.com)
12 * Copyright (C) 2000-2002 Andi Kleen, SuSE Labs (x86-64 port)
13 * Copyright (C) 2000 Silicon Graphics, Inc.
14 * Copyright (C) 2001 IBM
15 * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation
16 * Copyright (C) 2004 Arnd Bergmann (arnd@arndb.de)
17 *
18 * This code is collected from the versions for sparc64, mips64, s390x, ia64,
19 * ppc64 and x86_64, all of which are based on the original sparc64 version
20 * by Jakub Jelinek.
21 *
22 */
23 #include <linux/compat.h>
24 #include <linux/errno.h>
25 #include <linux/highuid.h>
26 #include <linux/init.h>
27 #include <linux/msg.h>
28 #include <linux/shm.h>
29 #include <linux/slab.h>
30 #include <linux/syscalls.h>
32 #include <linux/mutex.h>
33 #include <asm/uaccess.h>
35 #include "util.h"
37 struct compat_msgbuf {
38 compat_long_t mtype;
39 char mtext[1];
40 };
42 struct compat_ipc_perm {
43 key_t key;
44 __compat_uid_t uid;
45 __compat_gid_t gid;
46 __compat_uid_t cuid;
47 __compat_gid_t cgid;
48 compat_mode_t mode;
49 unsigned short seq;
50 };
52 struct compat_semid_ds {
53 struct compat_ipc_perm sem_perm;
54 compat_time_t sem_otime;
55 compat_time_t sem_ctime;
56 compat_uptr_t sem_base;
57 compat_uptr_t sem_pending;
58 compat_uptr_t sem_pending_last;
59 compat_uptr_t undo;
60 unsigned short sem_nsems;
61 };
63 struct compat_msqid_ds {
64 struct compat_ipc_perm msg_perm;
65 compat_uptr_t msg_first;
66 compat_uptr_t msg_last;
67 compat_time_t msg_stime;
68 compat_time_t msg_rtime;
69 compat_time_t msg_ctime;
70 compat_ulong_t msg_lcbytes;
71 compat_ulong_t msg_lqbytes;
72 unsigned short msg_cbytes;
73 unsigned short msg_qnum;
74 unsigned short msg_qbytes;
75 compat_ipc_pid_t msg_lspid;
76 compat_ipc_pid_t msg_lrpid;
77 };
79 struct compat_shmid_ds {
80 struct compat_ipc_perm shm_perm;
81 int shm_segsz;
82 compat_time_t shm_atime;
83 compat_time_t shm_dtime;
84 compat_time_t shm_ctime;
85 compat_ipc_pid_t shm_cpid;
86 compat_ipc_pid_t shm_lpid;
87 unsigned short shm_nattch;
88 unsigned short shm_unused;
89 compat_uptr_t shm_unused2;
90 compat_uptr_t shm_unused3;
91 };
93 struct compat_ipc_kludge {
94 compat_uptr_t msgp;
95 compat_long_t msgtyp;
96 };
98 struct compat_shminfo64 {
99 compat_ulong_t shmmax;
100 compat_ulong_t shmmin;
101 compat_ulong_t shmmni;
102 compat_ulong_t shmseg;
103 compat_ulong_t shmall;
104 compat_ulong_t __unused1;
105 compat_ulong_t __unused2;
106 compat_ulong_t __unused3;
107 compat_ulong_t __unused4;
108 };
110 struct compat_shm_info {
111 compat_int_t used_ids;
112 compat_ulong_t shm_tot, shm_rss, shm_swp;
113 compat_ulong_t swap_attempts, swap_successes;
114 };
116 extern int sem_ctls[];
117 #define sc_semopm (sem_ctls[2])
118 #define MAXBUF (64*1024)
120 static inline int compat_ipc_parse_version(int *cmd)
121 {
122 int version = *cmd & IPC_64;
124 /* this is tricky: architectures that have support for the old
125 * ipc structures in 64 bit binaries need to have IPC_64 set
126 * in cmd, the others need to have it cleared */
127 #ifndef ipc_parse_version
128 *cmd |= IPC_64;
129 #else
130 *cmd &= ~IPC_64;
131 #endif
132 return version;
133 }
135 static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
136 struct compat_ipc64_perm __user *up64)
137 {
138 int err;
140 err = __get_user(p64->uid, &up64->uid);
141 err |= __get_user(p64->gid, &up64->gid);
142 err |= __get_user(p64->mode, &up64->mode);
143 return err;
144 }
146 static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
147 struct compat_ipc_perm __user *up)
148 {
149 int err;
151 err = __get_user(p->uid, &up->uid);
152 err |= __get_user(p->gid, &up->gid);
153 err |= __get_user(p->mode, &up->mode);
154 return err;
155 }
157 static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
158 struct compat_ipc64_perm __user *up64)
159 {
160 int err;
162 err = __put_user(p64->key, &up64->key);
163 err |= __put_user(p64->uid, &up64->uid);
164 err |= __put_user(p64->gid, &up64->gid);
165 err |= __put_user(p64->cuid, &up64->cuid);
166 err |= __put_user(p64->cgid, &up64->cgid);
167 err |= __put_user(p64->mode, &up64->mode);
168 err |= __put_user(p64->seq, &up64->seq);
169 return err;
170 }
172 static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
173 struct compat_ipc_perm __user *up)
174 {
175 int err;
176 __compat_uid_t u;
177 __compat_gid_t g;
179 err = __put_user(p->key, &up->key);
180 SET_UID(u, p->uid);
181 err |= __put_user(u, &up->uid);
182 SET_GID(g, p->gid);
183 err |= __put_user(g, &up->gid);
184 SET_UID(u, p->cuid);
185 err |= __put_user(u, &up->cuid);
186 SET_GID(g, p->cgid);
187 err |= __put_user(g, &up->cgid);
188 err |= __put_user(p->mode, &up->mode);
189 err |= __put_user(p->seq, &up->seq);
190 return err;
191 }
193 static inline int get_compat_semid64_ds(struct semid64_ds *s64,
194 struct compat_semid64_ds __user *up64)
195 {
196 if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
197 return -EFAULT;
198 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
199 }
201 static inline int get_compat_semid_ds(struct semid64_ds *s,
202 struct compat_semid_ds __user *up)
203 {
204 if (!access_ok (VERIFY_READ, up, sizeof(*up)))
205 return -EFAULT;
206 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
207 }
209 static inline int put_compat_semid64_ds(struct semid64_ds *s64,
210 struct compat_semid64_ds __user *up64)
211 {
212 int err;
214 if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
215 return -EFAULT;
216 err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
217 err |= __put_user(s64->sem_otime, &up64->sem_otime);
218 err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
219 err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
220 return err;
221 }
223 static inline int put_compat_semid_ds(struct semid64_ds *s,
224 struct compat_semid_ds __user *up)
225 {
226 int err;
228 if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
229 err = -EFAULT;
230 err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
231 err |= __put_user(s->sem_otime, &up->sem_otime);
232 err |= __put_user(s->sem_ctime, &up->sem_ctime);
233 err |= __put_user(s->sem_nsems, &up->sem_nsems);
234 return err;
235 }
237 long compat_sys_semctl(int first, int second, int third, void __user *uptr)
238 {
239 union semun fourth;
240 u32 pad;
241 int err, err2;
242 struct semid64_ds s64;
243 struct semid64_ds __user *up64;
244 int version = compat_ipc_parse_version(&third);
246 if (!uptr)
247 return -EINVAL;
248 if (get_user(pad, (u32 __user *) uptr))
249 return -EFAULT;
250 if ((third & (~IPC_64)) == SETVAL)
251 fourth.val = (int) pad;
252 else
253 fourth.__pad = compat_ptr(pad);
254 switch (third & (~IPC_64)) {
255 case IPC_INFO:
256 case IPC_RMID:
257 case SEM_INFO:
258 case GETVAL:
259 case GETPID:
260 case GETNCNT:
261 case GETZCNT:
262 case GETALL:
263 case SETVAL:
264 case SETALL:
265 err = sys_semctl(first, second, third, fourth);
266 break;
268 case IPC_STAT:
269 case SEM_STAT:
270 up64 = compat_alloc_user_space(sizeof(s64));
271 fourth.__pad = up64;
272 err = sys_semctl(first, second, third, fourth);
273 if (err < 0)
274 break;
275 if (copy_from_user(&s64, up64, sizeof(s64)))
276 err2 = -EFAULT;
277 else if (version == IPC_64)
278 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
279 else
280 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
281 if (err2)
282 err = -EFAULT;
283 break;
285 case IPC_SET:
286 if (version == IPC_64) {
287 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
288 } else {
289 err = get_compat_semid_ds(&s64, compat_ptr(pad));
290 }
291 up64 = compat_alloc_user_space(sizeof(s64));
292 if (copy_to_user(up64, &s64, sizeof(s64)))
293 err = -EFAULT;
294 if (err)
295 break;
297 fourth.__pad = up64;
298 err = sys_semctl(first, second, third, fourth);
299 break;
301 default:
302 err = -EINVAL;
303 break;
304 }
305 return err;
306 }
308 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
309 {
310 struct msgbuf __user *p;
311 struct compat_msgbuf __user *up = uptr;
312 long type;
314 if (first < 0)
315 return -EINVAL;
316 if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
317 return -EINVAL;
319 p = compat_alloc_user_space(second + sizeof(struct msgbuf));
320 if (get_user(type, &up->mtype) ||
321 put_user(type, &p->mtype) ||
322 copy_in_user(p->mtext, up->mtext, second))
323 return -EFAULT;
325 return sys_msgsnd(first, p, second, third);
326 }
328 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
329 int version, void __user *uptr)
330 {
331 struct msgbuf __user *p;
332 struct compat_msgbuf __user *up;
333 long type;
334 int err;
336 if (first < 0)
337 return -EINVAL;
338 if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
339 return -EINVAL;
341 if (!version) {
342 struct compat_ipc_kludge ipck;
343 err = -EINVAL;
344 if (!uptr)
345 goto out;
346 err = -EFAULT;
347 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
348 goto out;
349 uptr = compat_ptr(ipck.msgp);
350 msgtyp = ipck.msgtyp;
351 }
352 p = compat_alloc_user_space(second + sizeof(struct msgbuf));
353 err = sys_msgrcv(first, p, second, msgtyp, third);
354 if (err < 0)
355 goto out;
356 up = uptr;
357 if (get_user(type, &p->mtype) ||
358 put_user(type, &up->mtype) ||
359 copy_in_user(up->mtext, p->mtext, err))
360 err = -EFAULT;
361 out:
362 return err;
363 }
365 static inline int get_compat_msqid64(struct msqid64_ds *m64,
366 struct compat_msqid64_ds __user *up64)
367 {
368 int err;
370 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
371 return -EFAULT;
372 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
373 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
374 return err;
375 }
377 static inline int get_compat_msqid(struct msqid64_ds *m,
378 struct compat_msqid_ds __user *up)
379 {
380 int err;
382 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
383 return -EFAULT;
384 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
385 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
386 return err;
387 }
389 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
390 struct compat_msqid64_ds __user *up64)
391 {
392 int err;
394 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
395 return -EFAULT;
396 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
397 err |= __put_user(m64->msg_stime, &up64->msg_stime);
398 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
399 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
400 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
401 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
402 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
403 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
404 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
405 return err;
406 }
408 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
409 struct compat_msqid_ds __user *up)
410 {
411 int err;
413 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
414 return -EFAULT;
415 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
416 err |= __put_user(m->msg_stime, &up->msg_stime);
417 err |= __put_user(m->msg_rtime, &up->msg_rtime);
418 err |= __put_user(m->msg_ctime, &up->msg_ctime);
419 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
420 err |= __put_user(m->msg_qnum, &up->msg_qnum);
421 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
422 err |= __put_user(m->msg_lspid, &up->msg_lspid);
423 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
424 return err;
425 }
427 long compat_sys_msgctl(int first, int second, void __user *uptr)
428 {
429 int err, err2;
430 struct msqid64_ds m64;
431 int version = compat_ipc_parse_version(&second);
432 void __user *p;
434 switch (second & (~IPC_64)) {
435 case IPC_INFO:
436 case IPC_RMID:
437 case MSG_INFO:
438 err = sys_msgctl(first, second, uptr);
439 break;
441 case IPC_SET:
442 if (version == IPC_64) {
443 err = get_compat_msqid64(&m64, uptr);
444 } else {
445 err = get_compat_msqid(&m64, uptr);
446 }
447 if (err)
448 break;
449 p = compat_alloc_user_space(sizeof(m64));
450 if (copy_to_user(p, &m64, sizeof(m64)))
451 err = -EFAULT;
452 else
453 err = sys_msgctl(first, second, p);
454 break;
456 case IPC_STAT:
457 case MSG_STAT:
458 p = compat_alloc_user_space(sizeof(m64));
459 err = sys_msgctl(first, second, p);
460 if (err < 0)
461 break;
462 if (copy_from_user(&m64, p, sizeof(m64)))
463 err2 = -EFAULT;
464 else if (version == IPC_64)
465 err2 = put_compat_msqid64_ds(&m64, uptr);
466 else
467 err2 = put_compat_msqid_ds(&m64, uptr);
468 if (err2)
469 err = -EFAULT;
470 break;
472 default:
473 err = -EINVAL;
474 break;
475 }
476 return err;
477 }
479 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
480 void __user *uptr)
481 {
482 int err;
483 unsigned long raddr;
484 compat_ulong_t __user *uaddr;
486 if (version == 1)
487 return -EINVAL;
488 err = do_shmat(first, uptr, second, &raddr);
489 if (err < 0)
490 return err;
491 uaddr = compat_ptr(third);
492 return put_user(raddr, uaddr);
493 }
495 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
496 struct compat_shmid64_ds __user *up64)
497 {
498 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
499 return -EFAULT;
500 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
501 }
503 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
504 struct compat_shmid_ds __user *up)
505 {
506 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
507 return -EFAULT;
508 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
509 }
511 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
512 struct compat_shmid64_ds __user *up64)
513 {
514 int err;
516 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
517 return -EFAULT;
518 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
519 err |= __put_user(s64->shm_atime, &up64->shm_atime);
520 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
521 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
522 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
523 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
524 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
525 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
526 return err;
527 }
529 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
530 struct compat_shmid_ds __user *up)
531 {
532 int err;
534 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
535 return -EFAULT;
536 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
537 err |= __put_user(s->shm_atime, &up->shm_atime);
538 err |= __put_user(s->shm_dtime, &up->shm_dtime);
539 err |= __put_user(s->shm_ctime, &up->shm_ctime);
540 err |= __put_user(s->shm_segsz, &up->shm_segsz);
541 err |= __put_user(s->shm_nattch, &up->shm_nattch);
542 err |= __put_user(s->shm_cpid, &up->shm_cpid);
543 err |= __put_user(s->shm_lpid, &up->shm_lpid);
544 return err;
545 }
547 static inline int put_compat_shminfo64(struct shminfo64 *smi,
548 struct compat_shminfo64 __user *up64)
549 {
550 int err;
552 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
553 return -EFAULT;
554 err = __put_user(smi->shmmax, &up64->shmmax);
555 err |= __put_user(smi->shmmin, &up64->shmmin);
556 err |= __put_user(smi->shmmni, &up64->shmmni);
557 err |= __put_user(smi->shmseg, &up64->shmseg);
558 err |= __put_user(smi->shmall, &up64->shmall);
559 return err;
560 }
562 static inline int put_compat_shminfo(struct shminfo64 *smi,
563 struct shminfo __user *up)
564 {
565 int err;
567 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
568 return -EFAULT;
569 err = __put_user(smi->shmmax, &up->shmmax);
570 err |= __put_user(smi->shmmin, &up->shmmin);
571 err |= __put_user(smi->shmmni, &up->shmmni);
572 err |= __put_user(smi->shmseg, &up->shmseg);
573 err |= __put_user(smi->shmall, &up->shmall);
574 return err;
575 }
577 static inline int put_compat_shm_info(struct shm_info __user *ip,
578 struct compat_shm_info __user *uip)
579 {
580 int err;
581 struct shm_info si;
583 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
584 copy_from_user(&si, ip, sizeof(si)))
585 return -EFAULT;
586 err = __put_user(si.used_ids, &uip->used_ids);
587 err |= __put_user(si.shm_tot, &uip->shm_tot);
588 err |= __put_user(si.shm_rss, &uip->shm_rss);
589 err |= __put_user(si.shm_swp, &uip->shm_swp);
590 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
591 err |= __put_user(si.swap_successes, &uip->swap_successes);
592 return err;
593 }
595 long compat_sys_shmctl(int first, int second, void __user *uptr)
596 {
597 void __user *p;
598 struct shmid64_ds s64;
599 struct shminfo64 smi;
600 int err, err2;
601 int version = compat_ipc_parse_version(&second);
603 switch (second & (~IPC_64)) {
604 case IPC_RMID:
605 case SHM_LOCK:
606 case SHM_UNLOCK:
607 err = sys_shmctl(first, second, uptr);
608 break;
610 case IPC_INFO:
611 p = compat_alloc_user_space(sizeof(smi));
612 err = sys_shmctl(first, second, p);
613 if (err < 0)
614 break;
615 if (copy_from_user(&smi, p, sizeof(smi)))
616 err2 = -EFAULT;
617 else if (version == IPC_64)
618 err2 = put_compat_shminfo64(&smi, uptr);
619 else
620 err2 = put_compat_shminfo(&smi, uptr);
621 if (err2)
622 err = -EFAULT;
623 break;
626 case IPC_SET:
627 if (version == IPC_64) {
628 err = get_compat_shmid64_ds(&s64, uptr);
629 } else {
630 err = get_compat_shmid_ds(&s64, uptr);
631 }
632 if (err)
633 break;
634 p = compat_alloc_user_space(sizeof(s64));
635 if (copy_to_user(p, &s64, sizeof(s64)))
636 err = -EFAULT;
637 else
638 err = sys_shmctl(first, second, p);
639 break;
641 case IPC_STAT:
642 case SHM_STAT:
643 p = compat_alloc_user_space(sizeof(s64));
644 err = sys_shmctl(first, second, p);
645 if (err < 0)
646 break;
647 if (copy_from_user(&s64, p, sizeof(s64)))
648 err2 = -EFAULT;
649 else if (version == IPC_64)
650 err2 = put_compat_shmid64_ds(&s64, uptr);
651 else
652 err2 = put_compat_shmid_ds(&s64, uptr);
653 if (err2)
654 err = -EFAULT;
655 break;
657 case SHM_INFO:
658 p = compat_alloc_user_space(sizeof(struct shm_info));
659 err = sys_shmctl(first, second, p);
660 if (err < 0)
661 break;
662 err2 = put_compat_shm_info(p, uptr);
663 if (err2)
664 err = -EFAULT;
665 break;
667 default:
668 err = -EINVAL;
669 break;
670 }
671 return err;
672 }
674 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
675 unsigned nsops, const struct compat_timespec __user *timeout)
676 {
677 struct timespec __user *ts64 = NULL;
678 if (timeout) {
679 struct timespec ts;
680 ts64 = compat_alloc_user_space(sizeof(*ts64));
681 if (get_compat_timespec(&ts, timeout))
682 return -EFAULT;
683 if (copy_to_user(ts64, &ts, sizeof(ts)))
684 return -EFAULT;
685 }
686 return sys_semtimedop(semid, tsems, nsops, ts64);
687 }