int (*get_file_size)(struct thread_data *, struct fio_file *);
void (*terminate)(struct thread_data *);
int (*io_u_init)(struct thread_data *, struct io_u *);
int (*get_file_size)(struct thread_data *, struct fio_file *);
void (*terminate)(struct thread_data *);
int (*io_u_init)(struct thread_data *, struct io_u *);