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);