compat.c (2299B)
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 38int 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 50int 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 62void 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 73void 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}