1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * linux/fs/pnode.h
4 *
5 * (C) Copyright IBM Corporation 2005.
6 */
7#ifndef _LINUX_PNODE_H
8#define _LINUX_PNODE_H
9
10#include <linux/list.h>
11#include "mount.h"
12
13#define IS_MNT_SHARED(m) ((m)->mnt.mnt_flags & MNT_SHARED)
14#define IS_MNT_SLAVE(m) ((m)->mnt_master)
15#define IS_MNT_NEW(m) (!(m)->mnt_ns || is_anon_ns((m)->mnt_ns))
16#define CLEAR_MNT_SHARED(m) ((m)->mnt.mnt_flags &= ~MNT_SHARED)
17#define IS_MNT_UNBINDABLE(m) ((m)->mnt.mnt_flags & MNT_UNBINDABLE)
18#define IS_MNT_MARKED(m) ((m)->mnt.mnt_flags & MNT_MARKED)
19#define SET_MNT_MARK(m) ((m)->mnt.mnt_flags |= MNT_MARKED)
20#define CLEAR_MNT_MARK(m) ((m)->mnt.mnt_flags &= ~MNT_MARKED)
21#define IS_MNT_LOCKED(m) ((m)->mnt.mnt_flags & MNT_LOCKED)
22
23#define CL_EXPIRE 0x01
24#define CL_SLAVE 0x02
25#define CL_COPY_UNBINDABLE 0x04
26#define CL_MAKE_SHARED 0x08
27#define CL_PRIVATE 0x10
28#define CL_SHARED_TO_SLAVE 0x20
29#define CL_COPY_MNT_NS_FILE 0x40
30
31#define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE)
32
33static inline void set_mnt_shared(struct mount *mnt)
34{
35 mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK;
36 mnt->mnt.mnt_flags |= MNT_SHARED;
37}
38
39void change_mnt_propagation(struct mount *, int);
40int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
41 struct hlist_head *);
42int propagate_umount(struct list_head *);
43int propagate_mount_busy(struct mount *, int);
44void propagate_mount_unlock(struct mount *);
45void mnt_release_group_id(struct mount *);
46int get_dominating_id(struct mount *mnt, const struct path *root);
47int mnt_get_count(struct mount *mnt);
48void mnt_set_mountpoint(struct mount *, struct mountpoint *,
49 struct mount *);
50void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
51 struct mount *mnt);
52struct mount *copy_tree(struct mount *, struct dentry *, int);
53bool is_path_reachable(struct mount *, struct dentry *,
54 const struct path *root);
55int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
56bool propagation_would_overmount(const struct mount *from,
57 const struct mount *to,
58 const struct mountpoint *mp);
59#endif /* _LINUX_PNODE_H */
60

source code of linux/fs/pnode.h