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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 
 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 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 #endif /* _LINUX_PNODE_H */
 57 

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