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_UNPRIVILEGED 0x40
31 #define CL_COPY_MNT_NS_FILE 0x80
32
33 #define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE)
34
set_mnt_shared(struct mount * mnt)35 static inline void set_mnt_shared(struct mount *mnt)
36 {
37 mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK;
38 mnt->mnt.mnt_flags |= MNT_SHARED;
39 }
40
41 void change_mnt_propagation(struct mount *, int);
42 int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
43 struct hlist_head *);
44 int propagate_umount(struct list_head *);
45 int propagate_mount_busy(struct mount *, int);
46 void propagate_mount_unlock(struct mount *);
47 void mnt_release_group_id(struct mount *);
48 int get_dominating_id(struct mount *mnt, const struct path *root);
49 unsigned int mnt_get_count(struct mount *mnt);
50 void mnt_set_mountpoint(struct mount *, struct mountpoint *,
51 struct mount *);
52 void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
53 struct mount *mnt);
54 struct mount *copy_tree(struct mount *, struct dentry *, int);
55 bool is_path_reachable(struct mount *, struct dentry *,
56 const struct path *root);
57 int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
58 #endif /* _LINUX_PNODE_H */
59