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Merge branch 'postmerge' into for-linus
[linux.git] / ipc / compat.c
CommitLineData
1da177e4
LT		 1/*
2 * 32 bit compatibility code for System V IPC
3 *
4 * Copyright (C) 1997,1998 Jakub Jelinek ([email protected])
5 * Copyright (C) 1997 David S. Miller ([email protected])
6 * Copyright (C) 1999 Arun Sharma <[email protected]>
7 * Copyright (C) 2000 VA Linux Co
8 * Copyright (C) 2000 Don Dugger <[email protected]>
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <[email protected]>
11 * Copyright (C) 2000 Gerhard Tonn ([email protected])
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 ([email protected])
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>
1da177e4
LT		 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>
1da177e4 29#include <linux/syscalls.h>
48b25c43 30#include <linux/ptrace.h>
1da177e4 31
5f921ae9 32#include <linux/mutex.h>
1da177e4
LT		 33#include <asm/uaccess.h>
34
35#include "util.h"
36
37struct compat_msgbuf {
38 compat_long_t mtype;
39 char mtext[1];
40};
41
42struct compat_ipc_perm {
43 key_t key;
202e5979
SR		 44 __compat_uid_t uid;
45 __compat_gid_t gid;
46 __compat_uid_t cuid;
47 __compat_gid_t cgid;
1da177e4
LT		 48 compat_mode_t mode;
49 unsigned short seq;
50};
51
52struct 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};
62
63struct 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};
78
79struct 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};
92
93struct compat_ipc_kludge {
94 compat_uptr_t msgp;
95 compat_long_t msgtyp;
96};
97
98struct 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};
109
110struct 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};
115
116extern int sem_ctls[];
117#define sc_semopm (sem_ctls[2])
1da177e4
LT		 118
119static inline int compat_ipc_parse_version(int *cmd)
120{
c1d7e01d 121#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
1da177e4
LT		 122 int version = *cmd & IPC_64;
123
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;
48b25c43
CM		 133#else
134 /* With the asm-generic APIs, we always use the 64-bit versions. */
135 return IPC_64;
136#endif
1da177e4
LT		 137}
138
139static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
140 struct compat_ipc64_perm __user *up64)
141{
142 int err;
143
144 err = __get_user(p64->uid, &up64->uid);
145 err |= __get_user(p64->gid, &up64->gid);
146 err |= __get_user(p64->mode, &up64->mode);
147 return err;
148}
149
150static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
151 struct compat_ipc_perm __user *up)
152{
153 int err;
154
155 err = __get_user(p->uid, &up->uid);
156 err |= __get_user(p->gid, &up->gid);
157 err |= __get_user(p->mode, &up->mode);
158 return err;
159}
160
161static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
162 struct compat_ipc64_perm __user *up64)
163{
164 int err;
165
166 err = __put_user(p64->key, &up64->key);
167 err |= __put_user(p64->uid, &up64->uid);
168 err |= __put_user(p64->gid, &up64->gid);
169 err |= __put_user(p64->cuid, &up64->cuid);
170 err |= __put_user(p64->cgid, &up64->cgid);
171 err |= __put_user(p64->mode, &up64->mode);
172 err |= __put_user(p64->seq, &up64->seq);
173 return err;
174}
175
176static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
177 struct compat_ipc_perm __user *up)
178{
179 int err;
202e5979
SR		 180 __compat_uid_t u;
181 __compat_gid_t g;
1da177e4
LT		 182
183 err = __put_user(p->key, &up->key);
184 SET_UID(u, p->uid);
185 err |= __put_user(u, &up->uid);
186 SET_GID(g, p->gid);
187 err |= __put_user(g, &up->gid);
188 SET_UID(u, p->cuid);
189 err |= __put_user(u, &up->cuid);
190 SET_GID(g, p->cgid);
191 err |= __put_user(g, &up->cgid);
192 err |= __put_user(p->mode, &up->mode);
193 err |= __put_user(p->seq, &up->seq);
194 return err;
195}
196
197static inline int get_compat_semid64_ds(struct semid64_ds *s64,
198 struct compat_semid64_ds __user *up64)
199{
200 if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
201 return -EFAULT;
202 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
203}
204
205static inline int get_compat_semid_ds(struct semid64_ds *s,
206 struct compat_semid_ds __user *up)
207{
208 if (!access_ok (VERIFY_READ, up, sizeof(*up)))
209 return -EFAULT;
210 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
211}
212
213static inline int put_compat_semid64_ds(struct semid64_ds *s64,
214 struct compat_semid64_ds __user *up64)
215{
216 int err;
217
218 if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
219 return -EFAULT;
220 err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
221 err |= __put_user(s64->sem_otime, &up64->sem_otime);
222 err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
223 err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
224 return err;
225}
226
227static inline int put_compat_semid_ds(struct semid64_ds *s,
228 struct compat_semid_ds __user *up)
229{
230 int err;
231
232 if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
d57d9731 233 return -EFAULT;
1da177e4
LT		 234 err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
235 err |= __put_user(s->sem_otime, &up->sem_otime);
236 err |= __put_user(s->sem_ctime, &up->sem_ctime);
237 err |= __put_user(s->sem_nsems, &up->sem_nsems);
238 return err;
239}
240
48b25c43 241static long do_compat_semctl(int first, int second, int third, u32 pad)
1da177e4 242{
e1fd1f49 243 unsigned long fourth;
1da177e4
LT		 244 int err, err2;
245 struct semid64_ds s64;
246 struct semid64_ds __user *up64;
247 int version = compat_ipc_parse_version(&third);
248
03145beb
DR		 249 memset(&s64, 0, sizeof(s64));
250
1da177e4 251 if ((third & (~IPC_64)) == SETVAL)
e1fd1f49
AV		 252#ifdef __BIG_ENDIAN
253 fourth = (unsigned long)pad << 32;
254#else
255 fourth = pad;
256#endif
1da177e4 257 else
e1fd1f49 258 fourth = (unsigned long)compat_ptr(pad);
1da177e4
LT		 259 switch (third & (~IPC_64)) {
260 case IPC_INFO:
261 case IPC_RMID:
262 case SEM_INFO:
263 case GETVAL:
264 case GETPID:
265 case GETNCNT:
266 case GETZCNT:
267 case GETALL:
268 case SETVAL:
269 case SETALL:
270 err = sys_semctl(first, second, third, fourth);
271 break;
272
273 case IPC_STAT:
274 case SEM_STAT:
275 up64 = compat_alloc_user_space(sizeof(s64));
e1fd1f49 276 fourth = (unsigned long)up64;
1da177e4
LT		 277 err = sys_semctl(first, second, third, fourth);
278 if (err < 0)
279 break;
280 if (copy_from_user(&s64, up64, sizeof(s64)))
281 err2 = -EFAULT;
282 else if (version == IPC_64)
283 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
284 else
285 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
286 if (err2)
287 err = -EFAULT;
288 break;
289
290 case IPC_SET:
291 if (version == IPC_64) {
292 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
293 } else {
294 err = get_compat_semid_ds(&s64, compat_ptr(pad));
295 }
296 up64 = compat_alloc_user_space(sizeof(s64));
297 if (copy_to_user(up64, &s64, sizeof(s64)))
298 err = -EFAULT;
299 if (err)
300 break;
301
e1fd1f49 302 fourth = (unsigned long)up64;
1da177e4
LT		 303 err = sys_semctl(first, second, third, fourth);
304 break;
305
306 default:
307 err = -EINVAL;
308 break;
309 }
310 return err;
311}
312
0e65a81b 313static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
f9dd87f4
SK		 314{
315 struct compat_msgbuf __user *msgp = dest;
316 size_t msgsz;
317
318 if (put_user(msg->m_type, &msgp->mtype))
319 return -EFAULT;
320
321 msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
322 if (store_msg(msgp->mtext, msg, msgsz))
323 return -EFAULT;
324 return msgsz;
325}
326
0e65a81b
AV		 327#ifndef COMPAT_SHMLBA
328#define COMPAT_SHMLBA SHMLBA
329#endif
56e41d3c 330
0e65a81b 331#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
56e41d3c
AV		 332COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
333 u32, third, compat_uptr_t, ptr, u32, fifth)
334{
335 int version;
0e65a81b 336 u32 pad;
56e41d3c
AV		 337
338 version = call >> 16; /* hack for backward compatibility */
339 call &= 0xffff;
340
341 switch (call) {
342 case SEMOP:
343 /* struct sembuf is the same on 32 and 64bit :)) */
344 return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
345 case SEMTIMEDOP:
346 return compat_sys_semtimedop(first, compat_ptr(ptr), second,
347 compat_ptr(fifth));
348 case SEMGET:
349 return sys_semget(first, second, third);
350 case SEMCTL:
0e65a81b
AV		 351 if (!ptr)
352 return -EINVAL;
353 if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
354 return -EFAULT;
355 return do_compat_semctl(first, second, third, pad);
356
357 case MSGSND: {
358 struct compat_msgbuf __user *up = compat_ptr(ptr);
359 compat_long_t type;
360
361 if (first < 0 || second < 0)
362 return -EINVAL;
56e41d3c 363
0e65a81b
AV		 364 if (get_user(type, &up->mtype))
365 return -EFAULT;
366
367 return do_msgsnd(first, type, up->mtext, second, third);
368 }
369 case MSGRCV: {
370 void __user *uptr = compat_ptr(ptr);
371
372 if (first < 0 || second < 0)
373 return -EINVAL;
374
375 if (!version) {
376 struct compat_ipc_kludge ipck;
377 if (!uptr)
378 return -EINVAL;
379 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
380 return -EFAULT;
381 uptr = compat_ptr(ipck.msgp);
382 fifth = ipck.msgtyp;
383 }
384 return do_msgrcv(first, uptr, second, fifth, third,
385 compat_do_msg_fill);
386 }
56e41d3c
AV		 387 case MSGGET:
388 return sys_msgget(first, second);
389 case MSGCTL:
390 return compat_sys_msgctl(first, second, compat_ptr(ptr));
391
0e65a81b
AV		 392 case SHMAT: {
393 int err;
394 unsigned long raddr;
395
396 if (version == 1)
397 return -EINVAL;
398 err = do_shmat(first, compat_ptr(ptr), second, &raddr,
399 COMPAT_SHMLBA);
400 if (err < 0)
401 return err;
402 return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
403 }
56e41d3c
AV		 404 case SHMDT:
405 return sys_shmdt(compat_ptr(ptr));
406 case SHMGET:
407 return sys_shmget(first, (unsigned)second, third);
408 case SHMCTL:
409 return compat_sys_shmctl(first, second, compat_ptr(ptr));
410 }
411
412 return -ENOSYS;
413}
0e65a81b
AV		 414#endif
415
416COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
48b25c43
CM		 417{
418 return do_compat_semctl(semid, semnum, cmd, arg);
419}
420
0e65a81b
AV		 421COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
422 compat_ssize_t, msgsz, int, msgflg)
48b25c43 423{
0e65a81b 424 struct compat_msgbuf __user *up = compat_ptr(msgp);
48b25c43
CM		 425 compat_long_t mtype;
426
0e65a81b 427 if (get_user(mtype, &up->mtype))
48b25c43 428 return -EFAULT;
0e65a81b 429 return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
48b25c43
CM		 430}
431
0e65a81b
AV		 432COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
433 compat_ssize_t, msgsz, long, msgtyp, int, msgflg)
48b25c43 434{
0e65a81b
AV		 435 return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, msgtyp,
436 msgflg, compat_do_msg_fill);
48b25c43 437}
1da177e4
LT		 438
439static inline int get_compat_msqid64(struct msqid64_ds *m64,
440 struct compat_msqid64_ds __user *up64)
441{
442 int err;
443
444 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
445 return -EFAULT;
446 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
447 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
448 return err;
449}
450
451static inline int get_compat_msqid(struct msqid64_ds *m,
452 struct compat_msqid_ds __user *up)
453{
454 int err;
455
456 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
457 return -EFAULT;
458 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
459 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
460 return err;
461}
462
463static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
464 struct compat_msqid64_ds __user *up64)
465{
466 int err;
467
468 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
469 return -EFAULT;
470 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
471 err |= __put_user(m64->msg_stime, &up64->msg_stime);
472 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
473 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
474 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
475 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
476 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
477 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
478 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
479 return err;
480}
481
482static inline int put_compat_msqid_ds(struct msqid64_ds *m,
483 struct compat_msqid_ds __user *up)
484{
485 int err;
486
487 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
488 return -EFAULT;
489 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
490 err |= __put_user(m->msg_stime, &up->msg_stime);
491 err |= __put_user(m->msg_rtime, &up->msg_rtime);
492 err |= __put_user(m->msg_ctime, &up->msg_ctime);
493 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
494 err |= __put_user(m->msg_qnum, &up->msg_qnum);
495 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
496 err |= __put_user(m->msg_lspid, &up->msg_lspid);
497 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
498 return err;
499}
500
501long compat_sys_msgctl(int first, int second, void __user *uptr)
502{
503 int err, err2;
504 struct msqid64_ds m64;
505 int version = compat_ipc_parse_version(&second);
506 void __user *p;
507
03145beb
DR		 508 memset(&m64, 0, sizeof(m64));
509
1da177e4
LT		 510 switch (second & (~IPC_64)) {
511 case IPC_INFO:
512 case IPC_RMID:
513 case MSG_INFO:
514 err = sys_msgctl(first, second, uptr);
515 break;
516
517 case IPC_SET:
518 if (version == IPC_64) {
519 err = get_compat_msqid64(&m64, uptr);
520 } else {
521 err = get_compat_msqid(&m64, uptr);
522 }
523 if (err)
524 break;
525 p = compat_alloc_user_space(sizeof(m64));
526 if (copy_to_user(p, &m64, sizeof(m64)))
527 err = -EFAULT;
528 else
529 err = sys_msgctl(first, second, p);
530 break;
531
532 case IPC_STAT:
533 case MSG_STAT:
534 p = compat_alloc_user_space(sizeof(m64));
535 err = sys_msgctl(first, second, p);
536 if (err < 0)
537 break;
538 if (copy_from_user(&m64, p, sizeof(m64)))
539 err2 = -EFAULT;
540 else if (version == IPC_64)
541 err2 = put_compat_msqid64_ds(&m64, uptr);
542 else
543 err2 = put_compat_msqid_ds(&m64, uptr);
544 if (err2)
545 err = -EFAULT;
546 break;
547
548 default:
549 err = -EINVAL;
550 break;
551 }
552 return err;
553}
554
0e65a81b 555COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
48b25c43
CM		 556{
557 unsigned long ret;
558 long err;
559
079a96ae 560 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
48b25c43
CM		 561 if (err)
562 return err;
563 force_successful_syscall_return();
564 return (long)ret;
565}
1da177e4
LT		 566
567static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
568 struct compat_shmid64_ds __user *up64)
569{
570 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
571 return -EFAULT;
572 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
573}
574
575static inline int get_compat_shmid_ds(struct shmid64_ds *s,
576 struct compat_shmid_ds __user *up)
577{
578 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
579 return -EFAULT;
580 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
581}
582
583static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
584 struct compat_shmid64_ds __user *up64)
585{
586 int err;
587
588 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
589 return -EFAULT;
590 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
591 err |= __put_user(s64->shm_atime, &up64->shm_atime);
592 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
593 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
594 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
595 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
596 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
597 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
598 return err;
599}
600
601static inline int put_compat_shmid_ds(struct shmid64_ds *s,
602 struct compat_shmid_ds __user *up)
603{
604 int err;
605
606 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
607 return -EFAULT;
608 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
609 err |= __put_user(s->shm_atime, &up->shm_atime);
610 err |= __put_user(s->shm_dtime, &up->shm_dtime);
611 err |= __put_user(s->shm_ctime, &up->shm_ctime);
612 err |= __put_user(s->shm_segsz, &up->shm_segsz);
613 err |= __put_user(s->shm_nattch, &up->shm_nattch);
614 err |= __put_user(s->shm_cpid, &up->shm_cpid);
615 err |= __put_user(s->shm_lpid, &up->shm_lpid);
616 return err;
617}
618
619static inline int put_compat_shminfo64(struct shminfo64 *smi,
620 struct compat_shminfo64 __user *up64)
621{
622 int err;
623
624 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
625 return -EFAULT;
af7c693f
GS		 626 if (smi->shmmax > INT_MAX)
627 smi->shmmax = INT_MAX;
1da177e4
LT		 628 err = __put_user(smi->shmmax, &up64->shmmax);
629 err |= __put_user(smi->shmmin, &up64->shmmin);
630 err |= __put_user(smi->shmmni, &up64->shmmni);
631 err |= __put_user(smi->shmseg, &up64->shmseg);
632 err |= __put_user(smi->shmall, &up64->shmall);
633 return err;
634}
635
636static inline int put_compat_shminfo(struct shminfo64 *smi,
637 struct shminfo __user *up)
638{
639 int err;
640
641 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
642 return -EFAULT;
af7c693f
GS		 643 if (smi->shmmax > INT_MAX)
644 smi->shmmax = INT_MAX;
1da177e4
LT		 645 err = __put_user(smi->shmmax, &up->shmmax);
646 err |= __put_user(smi->shmmin, &up->shmmin);
647 err |= __put_user(smi->shmmni, &up->shmmni);
648 err |= __put_user(smi->shmseg, &up->shmseg);
649 err |= __put_user(smi->shmall, &up->shmall);
214a627c 650 return err;
1da177e4
LT		 651}
652
653static inline int put_compat_shm_info(struct shm_info __user *ip,
654 struct compat_shm_info __user *uip)
655{
656 int err;
657 struct shm_info si;
658
659 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
660 copy_from_user(&si, ip, sizeof(si)))
661 return -EFAULT;
662 err = __put_user(si.used_ids, &uip->used_ids);
663 err |= __put_user(si.shm_tot, &uip->shm_tot);
664 err |= __put_user(si.shm_rss, &uip->shm_rss);
665 err |= __put_user(si.shm_swp, &uip->shm_swp);
666 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
667 err |= __put_user(si.swap_successes, &uip->swap_successes);
668 return err;
669}
670
671long compat_sys_shmctl(int first, int second, void __user *uptr)
672{
673 void __user *p;
674 struct shmid64_ds s64;
675 struct shminfo64 smi;
676 int err, err2;
677 int version = compat_ipc_parse_version(&second);
678
03145beb
DR		 679 memset(&s64, 0, sizeof(s64));
680
1da177e4
LT		 681 switch (second & (~IPC_64)) {
682 case IPC_RMID:
683 case SHM_LOCK:
684 case SHM_UNLOCK:
685 err = sys_shmctl(first, second, uptr);
686 break;
687
688 case IPC_INFO:
689 p = compat_alloc_user_space(sizeof(smi));
690 err = sys_shmctl(first, second, p);
691 if (err < 0)
692 break;
693 if (copy_from_user(&smi, p, sizeof(smi)))
694 err2 = -EFAULT;
695 else if (version == IPC_64)
696 err2 = put_compat_shminfo64(&smi, uptr);
697 else
698 err2 = put_compat_shminfo(&smi, uptr);
699 if (err2)
700 err = -EFAULT;
701 break;
702
703
704 case IPC_SET:
705 if (version == IPC_64) {
706 err = get_compat_shmid64_ds(&s64, uptr);
707 } else {
708 err = get_compat_shmid_ds(&s64, uptr);
709 }
710 if (err)
711 break;
712 p = compat_alloc_user_space(sizeof(s64));
713 if (copy_to_user(p, &s64, sizeof(s64)))
714 err = -EFAULT;
715 else
716 err = sys_shmctl(first, second, p);
717 break;
718
719 case IPC_STAT:
720 case SHM_STAT:
721 p = compat_alloc_user_space(sizeof(s64));
722 err = sys_shmctl(first, second, p);
723 if (err < 0)
724 break;
725 if (copy_from_user(&s64, p, sizeof(s64)))
726 err2 = -EFAULT;
727 else if (version == IPC_64)
728 err2 = put_compat_shmid64_ds(&s64, uptr);
729 else
730 err2 = put_compat_shmid_ds(&s64, uptr);
731 if (err2)
732 err = -EFAULT;
733 break;
734
735 case SHM_INFO:
736 p = compat_alloc_user_space(sizeof(struct shm_info));
737 err = sys_shmctl(first, second, p);
738 if (err < 0)
739 break;
740 err2 = put_compat_shm_info(p, uptr);
741 if (err2)
742 err = -EFAULT;
743 break;
744
745 default:
746 err = -EINVAL;
747 break;
748 }
749 return err;
750}
751
752long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
753 unsigned nsops, const struct compat_timespec __user *timeout)
754{
755 struct timespec __user *ts64 = NULL;
756 if (timeout) {
757 struct timespec ts;
758 ts64 = compat_alloc_user_space(sizeof(*ts64));
759 if (get_compat_timespec(&ts, timeout))
760 return -EFAULT;
761 if (copy_to_user(ts64, &ts, sizeof(ts)))
762 return -EFAULT;
763 }
764 return sys_semtimedop(semid, tsems, nsops, ts64);
765}
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