1/*
2 * linux/fs/pnode.h
3 *
4 * (C) Copyright IBM Corporation 2005.
5 * Released under GPL v2.
6 *
7 */
8#ifndef _LINUX_PNODE_H
9#define _LINUX_PNODE_H
10
11#include <linux/list.h>
12#include "mount.h"
13
14#define IS_MNT_SHARED(m) ((m)->mnt.mnt_flags & MNT_SHARED)
15#define IS_MNT_SLAVE(m) ((m)->mnt_master)
16#define IS_MNT_NEW(m) (!(m)->mnt_ns)
17#define CLEAR_MNT_SHARED(m) ((m)->mnt.mnt_flags &= ~MNT_SHARED)
18#define IS_MNT_UNBINDABLE(m) ((m)->mnt.mnt_flags & MNT_UNBINDABLE)
19#define IS_MNT_MARKED(m) ((m)->mnt.mnt_flags & MNT_MARKED)
20#define SET_MNT_MARK(m) ((m)->mnt.mnt_flags |= MNT_MARKED)
21#define CLEAR_MNT_MARK(m) ((m)->mnt.mnt_flags &= ~MNT_MARKED)
22#define IS_MNT_LOCKED(m) ((m)->mnt.mnt_flags & MNT_LOCKED)
23
24#define CL_EXPIRE 0x01
25#define CL_SLAVE 0x02
26#define CL_COPY_UNBINDABLE 0x04
27#define CL_MAKE_SHARED 0x08
28#define CL_PRIVATE 0x10
29#define CL_SHARED_TO_SLAVE 0x20
30#define CL_COPY_MNT_NS_FILE 0x40
31
32#define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE)
33
34static inline void set_mnt_shared(struct mount *mnt)
35{
36 mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK;
37 mnt->mnt.mnt_flags |= MNT_SHARED;
38}
39
40void change_mnt_propagation(struct mount *, int);
41int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
42 struct hlist_head *);
43int propagate_umount(struct list_head *);
44int propagate_mount_busy(struct mount *, int);
45void propagate_mount_unlock(struct mount *);
46void mnt_release_group_id(struct mount *);
47int get_dominating_id(struct mount *mnt, const struct path *root);
48unsigned int mnt_get_count(struct mount *mnt);
49void mnt_set_mountpoint(struct mount *, struct mountpoint *,
50 struct mount *);
51void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
52 struct mount *mnt);
53struct mount *copy_tree(struct mount *, struct dentry *, int);
54bool is_path_reachable(struct mount *, struct dentry *,
55 const struct path *root);
56int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
57#endif /* _LINUX_PNODE_H */
58