int (*close_file)(struct thread_data *, struct fio_file *);
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 *);
+ void (*io_u_free)(struct thread_data *, struct io_u *);
int option_struct_size;
struct fio_option *options;
void *data;