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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef __LINUX_NSFS_H3#define __LINUX_NSFS_H4 5#include <linux/ioctl.h>6#include <linux/types.h>7 8#define NSIO 0xb79 10/* Returns a file descriptor that refers to an owning user namespace */11#define NS_GET_USERNS _IO(NSIO, 0x1)12/* Returns a file descriptor that refers to a parent namespace */13#define NS_GET_PARENT _IO(NSIO, 0x2)14/* Returns the type of namespace (CLONE_NEW* value) referred to by15 file descriptor */16#define NS_GET_NSTYPE _IO(NSIO, 0x3)17/* Get owner UID (in the caller's user namespace) for a user namespace */18#define NS_GET_OWNER_UID _IO(NSIO, 0x4)19/* Get the id for a mount namespace */20#define NS_GET_MNTNS_ID _IOR(NSIO, 0x5, __u64)21/* Translate pid from target pid namespace into the caller's pid namespace. */22#define NS_GET_PID_FROM_PIDNS _IOR(NSIO, 0x6, int)23/* Return thread-group leader id of pid in the callers pid namespace. */24#define NS_GET_TGID_FROM_PIDNS _IOR(NSIO, 0x7, int)25/* Translate pid from caller's pid namespace into a target pid namespace. */26#define NS_GET_PID_IN_PIDNS _IOR(NSIO, 0x8, int)27/* Return thread-group leader id of pid in the target pid namespace. */28#define NS_GET_TGID_IN_PIDNS _IOR(NSIO, 0x9, int)29 30struct mnt_ns_info {31 __u32 size;32 __u32 nr_mounts;33 __u64 mnt_ns_id;34};35 36#define MNT_NS_INFO_SIZE_VER0 16 /* size of first published struct */37 38/* Get information about namespace. */39#define NS_MNT_GET_INFO _IOR(NSIO, 10, struct mnt_ns_info)40/* Get next namespace. */41#define NS_MNT_GET_NEXT _IOR(NSIO, 11, struct mnt_ns_info)42/* Get previous namespace. */43#define NS_MNT_GET_PREV _IOR(NSIO, 12, struct mnt_ns_info)44 45#endif /* __LINUX_NSFS_H */46