1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * 32 bit compatibility code for System V IPC
4  *
5  * Copyright (C) 1997,1998	Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6  * Copyright (C) 1997		David S. Miller (davem@caip.rutgers.edu)
7  * Copyright (C) 1999		Arun Sharma <arun.sharma@intel.com>
8  * Copyright (C) 2000		VA Linux Co
9  * Copyright (C) 2000		Don Dugger <n0ano@valinux.com>
10  * Copyright (C) 2000           Hewlett-Packard Co.
11  * Copyright (C) 2000           David Mosberger-Tang <davidm@hpl.hp.com>
12  * Copyright (C) 2000           Gerhard Tonn (ton@de.ibm.com)
13  * Copyright (C) 2000-2002      Andi Kleen, SuSE Labs (x86-64 port)
14  * Copyright (C) 2000		Silicon Graphics, Inc.
15  * Copyright (C) 2001		IBM
16  * Copyright (C) 2004		IBM Deutschland Entwicklung GmbH, IBM Corporation
17  * Copyright (C) 2004		Arnd Bergmann (arnd@arndb.de)
18  *
19  * This code is collected from the versions for sparc64, mips64, s390x, ia64,
20  * ppc64 and x86_64, all of which are based on the original sparc64 version
21  * by Jakub Jelinek.
22  *
23  */
24 #include <linux/compat.h>
25 #include <linux/errno.h>
26 #include <linux/highuid.h>
27 #include <linux/init.h>
28 #include <linux/msg.h>
29 #include <linux/shm.h>
30 #include <linux/syscalls.h>
31 #include <linux/ptrace.h>
32 
33 #include <linux/mutex.h>
34 #include <linux/uaccess.h>
35 
36 #include "util.h"
37 
get_compat_ipc64_perm(struct ipc64_perm * to,struct compat_ipc64_perm __user * from)38 int get_compat_ipc64_perm(struct ipc64_perm *to,
39 			  struct compat_ipc64_perm __user *from)
40 {
41 	struct compat_ipc64_perm v;
42 	if (copy_from_user(&v, from, sizeof(v)))
43 		return -EFAULT;
44 	to->uid = v.uid;
45 	to->gid = v.gid;
46 	to->mode = v.mode;
47 	return 0;
48 }
49 
get_compat_ipc_perm(struct ipc64_perm * to,struct compat_ipc_perm __user * from)50 int get_compat_ipc_perm(struct ipc64_perm *to,
51 			struct compat_ipc_perm __user *from)
52 {
53 	struct compat_ipc_perm v;
54 	if (copy_from_user(&v, from, sizeof(v)))
55 		return -EFAULT;
56 	to->uid = v.uid;
57 	to->gid = v.gid;
58 	to->mode = v.mode;
59 	return 0;
60 }
61 
to_compat_ipc64_perm(struct compat_ipc64_perm * to,struct ipc64_perm * from)62 void to_compat_ipc64_perm(struct compat_ipc64_perm *to, struct ipc64_perm *from)
63 {
64 	to->key = from->key;
65 	to->uid = from->uid;
66 	to->gid = from->gid;
67 	to->cuid = from->cuid;
68 	to->cgid = from->cgid;
69 	to->mode = from->mode;
70 	to->seq = from->seq;
71 }
72 
to_compat_ipc_perm(struct compat_ipc_perm * to,struct ipc64_perm * from)73 void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from)
74 {
75 	to->key = from->key;
76 	SET_UID(to->uid, from->uid);
77 	SET_GID(to->gid, from->gid);
78 	SET_UID(to->cuid, from->cuid);
79 	SET_GID(to->cgid, from->cgid);
80 	to->mode = from->mode;
81 	to->seq = from->seq;
82 }
83