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
  35 static 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
  41 void change_mnt_propagation(struct mount *, int);
  42 int propagate_mnt(struct mount *, struct mountpoint *, struct mount *,
  43                 struct hlist_head *);
  44 int propagate_umount(struct list_head *);
  45 int propagate_mount_busy(struct mount *, int);
  46 void propagate_mount_unlock(struct mount *);
  47 void mnt_release_group_id(struct mount *);
  48 int get_dominating_id(struct mount *mnt, const struct path *root);
  49 unsigned int mnt_get_count(struct mount *mnt);
  50 void mnt_set_mountpoint(struct mount *, struct mountpoint *,
  51                         struct mount *);
  52 void mnt_change_mountpoint(struct mount *parent, struct mountpoint *mp,
  53                            struct mount *mnt);
  54 struct mount *copy_tree(struct mount *, struct dentry *, int);
  55 bool is_path_reachable(struct mount *, struct dentry *,
  56                          const struct path *root);
  57 int count_mounts(struct mnt_namespace *ns, struct mount *mnt);
  58 #endif /* _LINUX_PNODE_H */