diff options
Diffstat (limited to 'ipc/compat.c')
-rw-r--r-- | ipc/compat.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/ipc/compat.c b/ipc/compat.c new file mode 100644 index 0000000000..5ab8225923 --- /dev/null +++ b/ipc/compat.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * 32 bit compatibility code for System V IPC + * + * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> + * Copyright (C) 2000 VA Linux Co + * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> + * Copyright (C) 2000 Hewlett-Packard Co. + * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> + * Copyright (C) 2000 Gerhard Tonn (ton@de.ibm.com) + * Copyright (C) 2000-2002 Andi Kleen, SuSE Labs (x86-64 port) + * Copyright (C) 2000 Silicon Graphics, Inc. + * Copyright (C) 2001 IBM + * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation + * Copyright (C) 2004 Arnd Bergmann (arnd@arndb.de) + * + * This code is collected from the versions for sparc64, mips64, s390x, ia64, + * ppc64 and x86_64, all of which are based on the original sparc64 version + * by Jakub Jelinek. + * + */ +#include <linux/compat.h> +#include <linux/errno.h> +#include <linux/highuid.h> +#include <linux/init.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/syscalls.h> +#include <linux/ptrace.h> + +#include <linux/mutex.h> +#include <linux/uaccess.h> + +#include "util.h" + +int get_compat_ipc64_perm(struct ipc64_perm *to, + struct compat_ipc64_perm __user *from) +{ + struct compat_ipc64_perm v; + if (copy_from_user(&v, from, sizeof(v))) + return -EFAULT; + to->uid = v.uid; + to->gid = v.gid; + to->mode = v.mode; + return 0; +} + +int get_compat_ipc_perm(struct ipc64_perm *to, + struct compat_ipc_perm __user *from) +{ + struct compat_ipc_perm v; + if (copy_from_user(&v, from, sizeof(v))) + return -EFAULT; + to->uid = v.uid; + to->gid = v.gid; + to->mode = v.mode; + return 0; +} + +void to_compat_ipc64_perm(struct compat_ipc64_perm *to, struct ipc64_perm *from) +{ + to->key = from->key; + to->uid = from->uid; + to->gid = from->gid; + to->cuid = from->cuid; + to->cgid = from->cgid; + to->mode = from->mode; + to->seq = from->seq; +} + +void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from) +{ + to->key = from->key; + SET_UID(to->uid, from->uid); + SET_GID(to->gid, from->gid); + SET_UID(to->cuid, from->cuid); + SET_GID(to->cgid, from->cgid); + to->mode = from->mode; + to->seq = from->seq; +} |