void tape_std_read_backward(struct tape_device *device,
struct tape_request *request);
struct tape_request *tape_std_write_block(struct tape_device *, size_t);
-struct tape_request *tape_std_bread(struct tape_device *, struct request *);
-void tape_std_free_bread(struct tape_request *);
void tape_std_check_locate(struct tape_device *, struct tape_request *);
-struct tape_request *tape_std_bwrite(struct request *,
- struct tape_device *, int);
/* Some non-mtop commands. */
int tape_std_assign(struct tape_device *);