compat.c revision a78ee9ed
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/syscalls.h>
30#include <linux/ptrace.h>
31
32#include <linux/mutex.h>
33#include <linux/uaccess.h>
34
35#include "util.h"
36
37int get_compat_ipc64_perm(struct ipc64_perm *to,
38			  struct compat_ipc64_perm __user *from)
39{
40	struct compat_ipc64_perm v;
41	if (copy_from_user(&v, from, sizeof(v)))
42		return -EFAULT;
43	to->uid = v.uid;
44	to->gid = v.gid;
45	to->mode = v.mode;
46	return 0;
47}
48
49int get_compat_ipc_perm(struct ipc64_perm *to,
50			struct compat_ipc_perm __user *from)
51{
52	struct compat_ipc_perm v;
53	if (copy_from_user(&v, from, sizeof(v)))
54		return -EFAULT;
55	to->uid = v.uid;
56	to->gid = v.gid;
57	to->mode = v.mode;
58	return 0;
59}
60
61void to_compat_ipc64_perm(struct compat_ipc64_perm *to, struct ipc64_perm *from)
62{
63	to->key = from->key;
64	to->uid = from->uid;
65	to->gid = from->gid;
66	to->cuid = from->cuid;
67	to->cgid = from->cgid;
68	to->mode = from->mode;
69	to->seq = from->seq;
70}
71
72void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from)
73{
74	to->key = from->key;
75	SET_UID(to->uid, from->uid);
76	SET_GID(to->gid, from->gid);
77	SET_UID(to->cuid, from->cuid);
78	SET_GID(to->cgid, from->cgid);
79	to->mode = from->mode;
80	to->seq = from->seq;
81}
82
83COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
84		       unsigned, nsops,
85		       const struct compat_timespec __user *, timeout)
86{
87	struct timespec __user *ts64;
88	if (compat_convert_timespec(&ts64, timeout))
89		return -EFAULT;
90	return sys_semtimedop(semid, tsems, nsops, ts64);
91}
92