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 | |