1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef __LINUX_NSFS_H
3#define __LINUX_NSFS_H
4
5#include <linux/ioctl.h>
6
7#define NSIO	0xb7
8
9/* Returns a file descriptor that refers to an owning user namespace */
10#define NS_GET_USERNS		_IO(NSIO, 0x1)
11/* Returns a file descriptor that refers to a parent namespace */
12#define NS_GET_PARENT		_IO(NSIO, 0x2)
13/* Returns the type of namespace (CLONE_NEW* value) referred to by
14   file descriptor */
15#define NS_GET_NSTYPE		_IO(NSIO, 0x3)
16/* Get owner UID (in the caller's user namespace) for a user namespace */
17#define NS_GET_OWNER_UID	_IO(NSIO, 0x4)
18
19#endif /* __LINUX_NSFS_H */
20