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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/ipc/compat.c
26131 views
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// SPDX-License-Identifier: GPL-2.0

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/*

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 * 32 bit compatibility code for System V IPC

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 *

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 * Copyright (C) 1997,1998	Jakub Jelinek ([email protected])

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 * Copyright (C) 1997		David S. Miller ([email protected])

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 * Copyright (C) 1999		Arun Sharma <[email protected]>

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 * Copyright (C) 2000		VA Linux Co

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 * Copyright (C) 2000		Don Dugger <[email protected]>

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 * Copyright (C) 2000           Hewlett-Packard Co.

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 * Copyright (C) 2000           David Mosberger-Tang <[email protected]>

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 * Copyright (C) 2000           Gerhard Tonn ([email protected])

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 * Copyright (C) 2000-2002      Andi Kleen, SuSE Labs (x86-64 port)

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 * Copyright (C) 2000		Silicon Graphics, Inc.

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 * Copyright (C) 2001		IBM

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 * Copyright (C) 2004		IBM Deutschland Entwicklung GmbH, IBM Corporation

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 * Copyright (C) 2004		Arnd Bergmann ([email protected])

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 *

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 * This code is collected from the versions for sparc64, mips64, s390x, ia64,

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 * ppc64 and x86_64, all of which are based on the original sparc64 version

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 * by Jakub Jelinek.

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 *

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 */

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#include <linux/compat.h>

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#include <linux/errno.h>

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#include <linux/highuid.h>

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#include <linux/init.h>

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#include <linux/msg.h>

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#include <linux/shm.h>

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#include <linux/syscalls.h>

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#include <linux/ptrace.h>

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#include <linux/mutex.h>

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#include <linux/uaccess.h>

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#include "util.h"

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int get_compat_ipc64_perm(struct ipc64_perm *to,

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			  struct compat_ipc64_perm __user *from)

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{

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	struct compat_ipc64_perm v;

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	if (copy_from_user(&v, from, sizeof(v)))

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		return -EFAULT;

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	to->uid = v.uid;

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	to->gid = v.gid;

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	to->mode = v.mode;

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	return 0;

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}

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int get_compat_ipc_perm(struct ipc64_perm *to,

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			struct compat_ipc_perm __user *from)

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{

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	struct compat_ipc_perm v;

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	if (copy_from_user(&v, from, sizeof(v)))

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		return -EFAULT;

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	to->uid = v.uid;

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	to->gid = v.gid;

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	to->mode = v.mode;

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	return 0;

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}

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void to_compat_ipc64_perm(struct compat_ipc64_perm *to, struct ipc64_perm *from)

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{

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	to->key = from->key;

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	to->uid = from->uid;

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	to->gid = from->gid;

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	to->cuid = from->cuid;

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	to->cgid = from->cgid;

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	to->mode = from->mode;

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	to->seq = from->seq;

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}

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void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from)

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{

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	to->key = from->key;

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	SET_UID(to->uid, from->uid);

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	SET_GID(to->gid, from->gid);

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	SET_UID(to->cuid, from->cuid);

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	SET_GID(to->cgid, from->cgid);

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	to->mode = from->mode;

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	to->seq = from->seq;

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}

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