text: #ifndef FILESYS_INODE_H
  #define FILESYS_INODE_H
  
  #include <stdbool.h>
  #include "filesys/off_t.h"
  #include "devices/disk.h"
  
  struct bitmap;
  
  void inode_init (void);
  bool inode_create (disk_sector_t, off_t);
  struct inode* inode_open (disk_sector_t);
  struct inode* inode_reopen (struct inode*);
  disk_sector_t inode_get_inumber (const struct inode*);
  void inode_close (struct inode*);
  void inode_remove (struct inode*);
  off_t inode_read_at (struct inode*, void*, off_t size, off_t offset);
  off_t inode_write_at (struct inode*, const void*, off_t size, off_t offset);
  void inode_deny_write (struct inode*);
  void inode_allow_write (struct inode*);
  off_t inode_length (const struct inode*);
  
  #endif /* filesys/inode.h */
  