Line data    Source code

       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           0 :         mnt->mnt.mnt_flags &= ~MNT_SHARED_MASK;
      36           0 :         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 */