a618d31ac8
This starts to add private data associated directly
to mount points. The intent is to give filesystems
a sense of where they have come from, as a means of
letting a filesystem take different actions based on
this information.
Bug: 62094374
Bug: 120446149
Change-Id: Ie769d7b3bb2f5972afe05c1bf16cf88c91647ab2
Signed-off-by: Daniel Rosenberg <drosen@google.com>
[astrachan: Folded 89a54ed3bf68 ("ANDROID: mnt: Fix next_descendent")
into this patch]
Signed-off-by: Alistair Strachan <astrachan@google.com>
59 lines
2 KiB
C
59 lines
2 KiB
C
/*
|
|
* linux/fs/pnode.h
|
|
*
|
|
* (C) Copyright IBM Corporation 2005.
|
|
* Released under GPL v2.
|
|
*
|
|
*/
|
|
#ifndef _LINUX_PNODE_H
|
|
#define _LINUX_PNODE_H
|
|
|
|
#include <linux/list.h>
|
|
#include "mount.h"
|
|
|
|
#define IS_MNT_SHARED(m) ((m)->mnt.mnt_flags & MNT_SHARED)
|
|
#define IS_MNT_SLAVE(m) ((m)->mnt_master)
|
|
#define IS_MNT_NEW(m) (!(m)->mnt_ns)
|
|
#define CLEAR_MNT_SHARED(m) ((m)->mnt.mnt_flags &= ~MNT_SHARED)
|
|
#define IS_MNT_UNBINDABLE(m) ((m)->mnt.mnt_flags & MNT_UNBINDABLE)
|
|
#define IS_MNT_MARKED(m) ((m)->mnt.mnt_flags & MNT_MARKED)
|
|
#define SET_MNT_MARK(m) ((m)->mnt.mnt_flags |= MNT_MARKED)
|
|
#define CLEAR_MNT_MARK(m) ((m)->mnt.mnt_flags &= ~MNT_MARKED)
|
|
#define IS_MNT_LOCKED(m) ((m)->mnt.mnt_flags & MNT_LOCKED)
|
|
|
|
#define CL_EXPIRE 0x01
|
|
#define CL_SLAVE 0x02
|
|
#define CL_COPY_UNBINDABLE 0x04
|
|
#define CL_MAKE_SHARED 0x08
|
|
#define CL_PRIVATE 0x10
|
|
#define CL_SHARED_TO_SLAVE 0x20
|
|
#define CL_UNPRIVILEGED 0x40
|
|
#define CL_COPY_MNT_NS_FILE 0x80
|
|
|
|
#define CL_COPY_ALL (CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE)
|
|
|
|
static inline void set_mnt_shared(struct mount *mnt)
|
|
{
|
|
mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK;
|
|
mnt->mnt.mnt_flags |= MNT_SHARED;
|
|
}
|
|
|
|
void change_mnt_propagation(struct mount *, int);
|
|
int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
|
|
struct hlist_head *);
|
|
int propagate_umount(struct list_head *);
|
|
int propagate_mount_busy(struct mount *, int);
|
|
void propagate_mount_unlock(struct mount *);
|
|
void propagate_remount(struct mount *);
|
|
void mnt_release_group_id(struct mount *);
|
|
int get_dominating_id(struct mount *mnt, const struct path *root);
|
|
unsigned int mnt_get_count(struct mount *mnt);
|
|
void mnt_set_mountpoint(struct mount *, struct mountpoint *,
|
|
struct mount *);
|
|
void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
|
|
struct mount *mnt);
|
|
struct mount *copy_tree(struct mount *, struct dentry *, int);
|
|
bool is_path_reachable(struct mount *, struct dentry *,
|
|
const struct path *root);
|
|
int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
|
|
#endif /* _LINUX_PNODE_H */
|