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
33 static 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
39 void change_mnt_propagation(struct mount *, int);
40 int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
41 struct hlist_head *);
42 int propagate_umount(struct list_head *);
43 int propagate_mount_busy(struct mount *, int);
44 void propagate_mount_unlock(struct mount *);
45 void mnt_release_group_id(struct mount *);
46 int get_dominating_id(struct mount *mnt, const struct path *root);
47 int mnt_get_count(struct mount *mnt);
48 void mnt_set_mountpoint(struct mount *, struct mountpoint *,
49 struct mount *);
50 void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
51 struct mount *mnt);
52 struct mount *copy_tree(struct mount *, struct dentry *, int);
53 bool is_path_reachable(struct mount *, struct dentry *,
54 const struct path *root);
55 int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
56 bool propagation_would_overmount(const struct mount *from,
57 const struct mount *to,
58 const struct mountpoint *mp);
59 #endif /* _LINUX_PNODE_H */
60
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