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