LXR linux/fs/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)
  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);
  47unsigned int 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);
  56#endif /* _LINUX_PNODE_H */
  57