LXR linux/fs/pnode.h

   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 *);
  52struct mount *copy_tree(struct mount *, struct dentry *, int);
  53bool is_path_reachable(struct mount *, struct dentry *,
  54                         const struct path *root);
  55#endif /* _LINUX_PNODE_H */
  56