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make do_mremap() static
[GitHub/mt8127/android_kernel_alcatel_ttab.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 (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>
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
LT		 242{
243 union semun 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
LT		 251 if ((third & (~IPC_64)) == SETVAL)
252 fourth.val = (int) pad;
253 else
254 fourth.__pad = compat_ptr(pad);
255 switch (third & (~IPC_64)) {
256 case IPC_INFO:
257 case IPC_RMID:
258 case SEM_INFO:
259 case GETVAL:
260 case GETPID:
261 case GETNCNT:
262 case GETZCNT:
263 case GETALL:
264 case SETVAL:
265 case SETALL:
266 err = sys_semctl(first, second, third, fourth);
267 break;
268
269 case IPC_STAT:
270 case SEM_STAT:
271 up64 = compat_alloc_user_space(sizeof(s64));
272 fourth.__pad = up64;
273 err = sys_semctl(first, second, third, fourth);
274 if (err < 0)
275 break;
276 if (copy_from_user(&s64, up64, sizeof(s64)))
277 err2 = -EFAULT;
278 else if (version == IPC_64)
279 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
280 else
281 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
282 if (err2)
283 err = -EFAULT;
284 break;
285
286 case IPC_SET:
287 if (version == IPC_64) {
288 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
289 } else {
290 err = get_compat_semid_ds(&s64, compat_ptr(pad));
291 }
292 up64 = compat_alloc_user_space(sizeof(s64));
293 if (copy_to_user(up64, &s64, sizeof(s64)))
294 err = -EFAULT;
295 if (err)
296 break;
297
298 fourth.__pad = up64;
299 err = sys_semctl(first, second, third, fourth);
300 break;
301
302 default:
303 err = -EINVAL;
304 break;
305 }
306 return err;
307}
308
0e65a81b 309static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
f9dd87f4
SK		 310{
311 struct compat_msgbuf __user *msgp = dest;
312 size_t msgsz;
313
314 if (put_user(msg->m_type, &msgp->mtype))
315 return -EFAULT;
316
317 msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
318 if (store_msg(msgp->mtext, msg, msgsz))
319 return -EFAULT;
320 return msgsz;
321}
322
0e65a81b
AV		 323#ifndef COMPAT_SHMLBA
324#define COMPAT_SHMLBA SHMLBA
325#endif
56e41d3c 326
0e65a81b 327#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
56e41d3c
AV		 328COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
329 u32, third, compat_uptr_t, ptr, u32, fifth)
330{
331 int version;
0e65a81b 332 u32 pad;
56e41d3c
AV		 333
334 version = call >> 16; /* hack for backward compatibility */
335 call &= 0xffff;
336
337 switch (call) {
338 case SEMOP:
339 /* struct sembuf is the same on 32 and 64bit :)) */
340 return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
341 case SEMTIMEDOP:
342 return compat_sys_semtimedop(first, compat_ptr(ptr), second,
343 compat_ptr(fifth));
344 case SEMGET:
345 return sys_semget(first, second, third);
346 case SEMCTL:
0e65a81b
AV		 347 if (!ptr)
348 return -EINVAL;
349 if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
350 return -EFAULT;
351 return do_compat_semctl(first, second, third, pad);
352
353 case MSGSND: {
354 struct compat_msgbuf __user *up = compat_ptr(ptr);
355 compat_long_t type;
356
357 if (first < 0 || second < 0)
358 return -EINVAL;
56e41d3c 359
0e65a81b
AV		 360 if (get_user(type, &up->mtype))
361 return -EFAULT;
362
363 return do_msgsnd(first, type, up->mtext, second, third);
364 }
365 case MSGRCV: {
366 void __user *uptr = compat_ptr(ptr);
367
368 if (first < 0 || second < 0)
369 return -EINVAL;
370
371 if (!version) {
372 struct compat_ipc_kludge ipck;
373 if (!uptr)
374 return -EINVAL;
375 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
376 return -EFAULT;
377 uptr = compat_ptr(ipck.msgp);
378 fifth = ipck.msgtyp;
379 }
380 return do_msgrcv(first, uptr, second, fifth, third,
381 compat_do_msg_fill);
382 }
56e41d3c
AV		 383 case MSGGET:
384 return sys_msgget(first, second);
385 case MSGCTL:
386 return compat_sys_msgctl(first, second, compat_ptr(ptr));
387
0e65a81b
AV		 388 case SHMAT: {
389 int err;
390 unsigned long raddr;
391
392 if (version == 1)
393 return -EINVAL;
394 err = do_shmat(first, compat_ptr(ptr), second, &raddr,
395 COMPAT_SHMLBA);
396 if (err < 0)
397 return err;
398 return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
399 }
56e41d3c
AV		 400 case SHMDT:
401 return sys_shmdt(compat_ptr(ptr));
402 case SHMGET:
403 return sys_shmget(first, (unsigned)second, third);
404 case SHMCTL:
405 return compat_sys_shmctl(first, second, compat_ptr(ptr));
406 }
407
408 return -ENOSYS;
409}
0e65a81b
AV		 410#endif
411
412COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
48b25c43
CM		 413{
414 return do_compat_semctl(semid, semnum, cmd, arg);
415}
416
0e65a81b
AV		 417COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
418 compat_ssize_t, msgsz, int, msgflg)
48b25c43 419{
0e65a81b 420 struct compat_msgbuf __user *up = compat_ptr(msgp);
48b25c43
CM		 421 compat_long_t mtype;
422
0e65a81b 423 if (get_user(mtype, &up->mtype))
48b25c43 424 return -EFAULT;
0e65a81b 425 return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
48b25c43
CM		 426}
427
0e65a81b
AV		 428COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
429 compat_ssize_t, msgsz, long, msgtyp, int, msgflg)
48b25c43 430{
0e65a81b
AV		 431 return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, msgtyp,
432 msgflg, compat_do_msg_fill);
48b25c43 433}
1da177e4
LT		 434
435static inline int get_compat_msqid64(struct msqid64_ds *m64,
436 struct compat_msqid64_ds __user *up64)
437{
438 int err;
439
440 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
441 return -EFAULT;
442 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
443 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
444 return err;
445}
446
447static inline int get_compat_msqid(struct msqid64_ds *m,
448 struct compat_msqid_ds __user *up)
449{
450 int err;
451
452 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
453 return -EFAULT;
454 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
455 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
456 return err;
457}
458
459static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
460 struct compat_msqid64_ds __user *up64)
461{
462 int err;
463
464 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
465 return -EFAULT;
466 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
467 err |= __put_user(m64->msg_stime, &up64->msg_stime);
468 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
469 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
470 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
471 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
472 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
473 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
474 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
475 return err;
476}
477
478static inline int put_compat_msqid_ds(struct msqid64_ds *m,
479 struct compat_msqid_ds __user *up)
480{
481 int err;
482
483 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
484 return -EFAULT;
485 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
486 err |= __put_user(m->msg_stime, &up->msg_stime);
487 err |= __put_user(m->msg_rtime, &up->msg_rtime);
488 err |= __put_user(m->msg_ctime, &up->msg_ctime);
489 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
490 err |= __put_user(m->msg_qnum, &up->msg_qnum);
491 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
492 err |= __put_user(m->msg_lspid, &up->msg_lspid);
493 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
494 return err;
495}
496
497long compat_sys_msgctl(int first, int second, void __user *uptr)
498{
499 int err, err2;
500 struct msqid64_ds m64;
501 int version = compat_ipc_parse_version(&second);
502 void __user *p;
503
03145beb
DR		 504 memset(&m64, 0, sizeof(m64));
505
1da177e4
LT		 506 switch (second & (~IPC_64)) {
507 case IPC_INFO:
508 case IPC_RMID:
509 case MSG_INFO:
510 err = sys_msgctl(first, second, uptr);
511 break;
512
513 case IPC_SET:
514 if (version == IPC_64) {
515 err = get_compat_msqid64(&m64, uptr);
516 } else {
517 err = get_compat_msqid(&m64, uptr);
518 }
519 if (err)
520 break;
521 p = compat_alloc_user_space(sizeof(m64));
522 if (copy_to_user(p, &m64, sizeof(m64)))
523 err = -EFAULT;
524 else
525 err = sys_msgctl(first, second, p);
526 break;
527
528 case IPC_STAT:
529 case MSG_STAT:
530 p = compat_alloc_user_space(sizeof(m64));
531 err = sys_msgctl(first, second, p);
532 if (err < 0)
533 break;
534 if (copy_from_user(&m64, p, sizeof(m64)))
535 err2 = -EFAULT;
536 else if (version == IPC_64)
537 err2 = put_compat_msqid64_ds(&m64, uptr);
538 else
539 err2 = put_compat_msqid_ds(&m64, uptr);
540 if (err2)
541 err = -EFAULT;
542 break;
543
544 default:
545 err = -EINVAL;
546 break;
547 }
548 return err;
549}
550
0e65a81b 551COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
48b25c43
CM		 552{
553 unsigned long ret;
554 long err;
555
079a96ae 556 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
48b25c43
CM		 557 if (err)
558 return err;
559 force_successful_syscall_return();
560 return (long)ret;
561}
1da177e4
LT		 562
563static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
564 struct compat_shmid64_ds __user *up64)
565{
566 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
567 return -EFAULT;
568 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
569}
570
571static inline int get_compat_shmid_ds(struct shmid64_ds *s,
572 struct compat_shmid_ds __user *up)
573{
574 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
575 return -EFAULT;
576 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
577}
578
579static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
580 struct compat_shmid64_ds __user *up64)
581{
582 int err;
583
584 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
585 return -EFAULT;
586 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
587 err |= __put_user(s64->shm_atime, &up64->shm_atime);
588 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
589 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
590 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
591 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
592 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
593 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
594 return err;
595}
596
597static inline int put_compat_shmid_ds(struct shmid64_ds *s,
598 struct compat_shmid_ds __user *up)
599{
600 int err;
601
602 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
603 return -EFAULT;
604 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
605 err |= __put_user(s->shm_atime, &up->shm_atime);
606 err |= __put_user(s->shm_dtime, &up->shm_dtime);
607 err |= __put_user(s->shm_ctime, &up->shm_ctime);
608 err |= __put_user(s->shm_segsz, &up->shm_segsz);
609 err |= __put_user(s->shm_nattch, &up->shm_nattch);
610 err |= __put_user(s->shm_cpid, &up->shm_cpid);
611 err |= __put_user(s->shm_lpid, &up->shm_lpid);
612 return err;
613}
614
615static inline int put_compat_shminfo64(struct shminfo64 *smi,
616 struct compat_shminfo64 __user *up64)
617{
618 int err;
619
620 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
621 return -EFAULT;
af7c693f
GS		 622 if (smi->shmmax > INT_MAX)
623 smi->shmmax = INT_MAX;
1da177e4
LT		 624 err = __put_user(smi->shmmax, &up64->shmmax);
625 err |= __put_user(smi->shmmin, &up64->shmmin);
626 err |= __put_user(smi->shmmni, &up64->shmmni);
627 err |= __put_user(smi->shmseg, &up64->shmseg);
628 err |= __put_user(smi->shmall, &up64->shmall);
629 return err;
630}
631
632static inline int put_compat_shminfo(struct shminfo64 *smi,
633 struct shminfo __user *up)
634{
635 int err;
636
637 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
638 return -EFAULT;
af7c693f
GS		 639 if (smi->shmmax > INT_MAX)
640 smi->shmmax = INT_MAX;
1da177e4
LT		 641 err = __put_user(smi->shmmax, &up->shmmax);
642 err |= __put_user(smi->shmmin, &up->shmmin);
643 err |= __put_user(smi->shmmni, &up->shmmni);
644 err |= __put_user(smi->shmseg, &up->shmseg);
645 err |= __put_user(smi->shmall, &up->shmall);
214a627c 646 return err;
1da177e4
LT		 647}
648
649static inline int put_compat_shm_info(struct shm_info __user *ip,
650 struct compat_shm_info __user *uip)
651{
652 int err;
653 struct shm_info si;
654
655 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
656 copy_from_user(&si, ip, sizeof(si)))
657 return -EFAULT;
658 err = __put_user(si.used_ids, &uip->used_ids);
659 err |= __put_user(si.shm_tot, &uip->shm_tot);
660 err |= __put_user(si.shm_rss, &uip->shm_rss);
661 err |= __put_user(si.shm_swp, &uip->shm_swp);
662 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
663 err |= __put_user(si.swap_successes, &uip->swap_successes);
664 return err;
665}
666
667long compat_sys_shmctl(int first, int second, void __user *uptr)
668{
669 void __user *p;
670 struct shmid64_ds s64;
671 struct shminfo64 smi;
672 int err, err2;
673 int version = compat_ipc_parse_version(&second);
674
03145beb
DR		 675 memset(&s64, 0, sizeof(s64));
676
1da177e4
LT		 677 switch (second & (~IPC_64)) {
678 case IPC_RMID:
679 case SHM_LOCK:
680 case SHM_UNLOCK:
681 err = sys_shmctl(first, second, uptr);
682 break;
683
684 case IPC_INFO:
685 p = compat_alloc_user_space(sizeof(smi));
686 err = sys_shmctl(first, second, p);
687 if (err < 0)
688 break;
689 if (copy_from_user(&smi, p, sizeof(smi)))
690 err2 = -EFAULT;
691 else if (version == IPC_64)
692 err2 = put_compat_shminfo64(&smi, uptr);
693 else
694 err2 = put_compat_shminfo(&smi, uptr);
695 if (err2)
696 err = -EFAULT;
697 break;
698
699
700 case IPC_SET:
701 if (version == IPC_64) {
702 err = get_compat_shmid64_ds(&s64, uptr);
703 } else {
704 err = get_compat_shmid_ds(&s64, uptr);
705 }
706 if (err)
707 break;
708 p = compat_alloc_user_space(sizeof(s64));
709 if (copy_to_user(p, &s64, sizeof(s64)))
710 err = -EFAULT;
711 else
712 err = sys_shmctl(first, second, p);
713 break;
714
715 case IPC_STAT:
716 case SHM_STAT:
717 p = compat_alloc_user_space(sizeof(s64));
718 err = sys_shmctl(first, second, p);
719 if (err < 0)
720 break;
721 if (copy_from_user(&s64, p, sizeof(s64)))
722 err2 = -EFAULT;
723 else if (version == IPC_64)
724 err2 = put_compat_shmid64_ds(&s64, uptr);
725 else
726 err2 = put_compat_shmid_ds(&s64, uptr);
727 if (err2)
728 err = -EFAULT;
729 break;
730
731 case SHM_INFO:
732 p = compat_alloc_user_space(sizeof(struct shm_info));
733 err = sys_shmctl(first, second, p);
734 if (err < 0)
735 break;
736 err2 = put_compat_shm_info(p, uptr);
737 if (err2)
738 err = -EFAULT;
739 break;
740
741 default:
742 err = -EINVAL;
743 break;
744 }
745 return err;
746}
747
748long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
749 unsigned nsops, const struct compat_timespec __user *timeout)
750{
751 struct timespec __user *ts64 = NULL;
752 if (timeout) {
753 struct timespec ts;
754 ts64 = compat_alloc_user_space(sizeof(*ts64));
755 if (get_compat_timespec(&ts, timeout))
756 return -EFAULT;
757 if (copy_to_user(ts64, &ts, sizeof(ts)))
758 return -EFAULT;
759 }
760 return sys_semtimedop(semid, tsems, nsops, ts64);
761}
kernel source for telekom puls (alcatel/mediatek)