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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __LINUX_NSFS_H
#define __LINUX_NSFS_H
#include <linux/ioctl.h>
#include <linux/types.h>
#define NSIO 0xb7
/* Returns a file descriptor that refers to an owning user namespace */
#define NS_GET_USERNS _IO(NSIO, 0x1)
/* Returns a file descriptor that refers to a parent namespace */
#define NS_GET_PARENT _IO(NSIO, 0x2)
/* Returns the type of namespace (CLONE_NEW* value) referred to by
file descriptor */
#define NS_GET_NSTYPE _IO(NSIO, 0x3)
/* Get owner UID (in the caller's user namespace) for a user namespace */
#define NS_GET_OWNER_UID _IO(NSIO, 0x4)
/* Translate pid from target pid namespace into the caller's pid namespace. */
#define NS_GET_PID_FROM_PIDNS _IOR(NSIO, 0x6, int)
/* Return thread-group leader id of pid in the callers pid namespace. */
#define NS_GET_TGID_FROM_PIDNS _IOR(NSIO, 0x7, int)
/* Translate pid from caller's pid namespace into a target pid namespace. */
#define NS_GET_PID_IN_PIDNS _IOR(NSIO, 0x8, int)
/* Return thread-group leader id of pid in the target pid namespace. */
#define NS_GET_TGID_IN_PIDNS _IOR(NSIO, 0x9, int)
struct mnt_ns_info {
__u32 size;
__u32 nr_mounts;
__u64 mnt_ns_id;
};
#define MNT_NS_INFO_SIZE_VER0 16 /* size of first published struct */
/* Get information about namespace. */
#define NS_MNT_GET_INFO _IOR(NSIO, 10, struct mnt_ns_info)
/* Get next namespace. */
#define NS_MNT_GET_NEXT _IOR(NSIO, 11, struct mnt_ns_info)
/* Get previous namespace. */
#define NS_MNT_GET_PREV _IOR(NSIO, 12, struct mnt_ns_info)
/* Retrieve namespace identifiers. */
#define NS_GET_MNTNS_ID _IOR(NSIO, 5, __u64)
#define NS_GET_ID _IOR(NSIO, 13, __u64)
enum init_ns_ino {
IPC_NS_INIT_INO = 0xEFFFFFFFU,
UTS_NS_INIT_INO = 0xEFFFFFFEU,
USER_NS_INIT_INO = 0xEFFFFFFDU,
PID_NS_INIT_INO = 0xEFFFFFFCU,
CGROUP_NS_INIT_INO = 0xEFFFFFFBU,
TIME_NS_INIT_INO = 0xEFFFFFFAU,
NET_NS_INIT_INO = 0xEFFFFFF9U,
MNT_NS_INIT_INO = 0xEFFFFFF8U,
#ifdef __KERNEL__
MNT_NS_ANON_INO = 0xEFFFFFF7U,
#endif
};
struct nsfs_file_handle {
__u64 ns_id;
__u32 ns_type;
__u32 ns_inum;
};
#define NSFS_FILE_HANDLE_SIZE_VER0 16 /* sizeof first published struct */
#define NSFS_FILE_HANDLE_SIZE_LATEST sizeof(struct nsfs_file_handle) /* sizeof latest published struct */
enum init_ns_id {
IPC_NS_INIT_ID = 1ULL,
UTS_NS_INIT_ID = 2ULL,
USER_NS_INIT_ID = 3ULL,
PID_NS_INIT_ID = 4ULL,
CGROUP_NS_INIT_ID = 5ULL,
TIME_NS_INIT_ID = 6ULL,
NET_NS_INIT_ID = 7ULL,
MNT_NS_INIT_ID = 8ULL,
#ifdef __KERNEL__
NS_LAST_INIT_ID = MNT_NS_INIT_ID,
#endif
};
enum ns_type {
TIME_NS = (1ULL << 7), /* CLONE_NEWTIME */
MNT_NS = (1ULL << 17), /* CLONE_NEWNS */
CGROUP_NS = (1ULL << 25), /* CLONE_NEWCGROUP */
UTS_NS = (1ULL << 26), /* CLONE_NEWUTS */
IPC_NS = (1ULL << 27), /* CLONE_NEWIPC */
USER_NS = (1ULL << 28), /* CLONE_NEWUSER */
PID_NS = (1ULL << 29), /* CLONE_NEWPID */
NET_NS = (1ULL << 30), /* CLONE_NEWNET */
};
/**
* struct ns_id_req - namespace ID request structure
* @size: size of this structure
* @spare: reserved for future use
* @filter: filter mask
* @ns_id: last namespace id
* @user_ns_id: owning user namespace ID
*
* Structure for passing namespace ID and miscellaneous parameters to
* statns(2) and listns(2).
*
* For statns(2) @param represents the request mask.
* For listns(2) @param represents the last listed mount id (or zero).
*/
struct ns_id_req {
__u32 size;
__u32 spare;
__u64 ns_id;
struct /* listns */ {
__u32 ns_type;
__u32 spare2;
__u64 user_ns_id;
};
};
/*
* Special @user_ns_id value that can be passed to listns()
*/
#define LISTNS_CURRENT_USER 0xffffffffffffffff /* Caller's userns */
/* List of all ns_id_req versions. */
#define NS_ID_REQ_SIZE_VER0 32 /* sizeof first published struct */
#endif /* __LINUX_NSFS_H */
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