mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-11-19 08:05:27 +08:00
a58b0eb8e6
A slave mount always has a master mount from which it receives mount/umount events. Unlike shared mount the event propagation does not flow from the slave mount to the master. Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
37 lines
948 B
C
37 lines
948 B
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 <linux/mount.h>
|
|
|
|
#define IS_MNT_SHARED(mnt) (mnt->mnt_flags & MNT_SHARED)
|
|
#define IS_MNT_SLAVE(mnt) (mnt->mnt_master)
|
|
#define IS_MNT_NEW(mnt) (!mnt->mnt_namespace)
|
|
#define CLEAR_MNT_SHARED(mnt) (mnt->mnt_flags &= ~MNT_SHARED)
|
|
|
|
#define CL_EXPIRE 0x01
|
|
#define CL_SLAVE 0x02
|
|
#define CL_COPY_ALL 0x04
|
|
#define CL_MAKE_SHARED 0x08
|
|
#define CL_PROPAGATION 0x10
|
|
|
|
static inline void set_mnt_shared(struct vfsmount *mnt)
|
|
{
|
|
mnt->mnt_flags &= ~MNT_PNODE_MASK;
|
|
mnt->mnt_flags |= MNT_SHARED;
|
|
}
|
|
|
|
void change_mnt_propagation(struct vfsmount *, int);
|
|
int propagate_mnt(struct vfsmount *, struct dentry *, struct vfsmount *,
|
|
struct list_head *);
|
|
int propagate_umount(struct list_head *);
|
|
int propagate_mount_busy(struct vfsmount *, int);
|
|
#endif /* _LINUX_PNODE_H */
|