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
35static 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
41void change_mnt_propagation(struct mount *, int);
42int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
43		struct hlist_head *);
44int propagate_umount(struct list_head *);
45int propagate_mount_busy(struct mount *, int);
46void propagate_mount_unlock(struct mount *);
47void mnt_release_group_id(struct mount *);
48int get_dominating_id(struct mount *mnt, const struct path *root);
49unsigned int mnt_get_count(struct mount *mnt);
50void mnt_set_mountpoint(struct mount *, struct mountpoint *,
51			struct mount *);
52void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
53			   struct mount *mnt);
54struct mount *copy_tree(struct mount *, struct dentry *, int);
55bool is_path_reachable(struct mount *, struct dentry *,
56			 const struct path *root);
57int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
 
 
 
58#endif /* _LINUX_PNODE_H */

 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 */