dm_target_io 294 include/linux/device-mapper.h return (char *)bio - offsetof(struct dm_target_io, clone) - data_size; dm_target_io 299 include/linux/device-mapper.h return (struct bio *)((char *)data + data_size + offsetof(struct dm_target_io, clone)); dm_target_io 304 include/linux/device-mapper.h return container_of(bio, struct dm_target_io, clone)->target_bio_nr;