int dt_record_write(const struct lu_env *env, struct dt_object *dt,
const struct lu_buf *buf, loff_t *pos, struct thandle *th);
typedef int (*dt_index_page_build_t)(const struct lu_env *env,
int dt_record_write(const struct lu_env *env, struct dt_object *dt,
const struct lu_buf *buf, loff_t *pos, struct thandle *th);
typedef int (*dt_index_page_build_t)(const struct lu_env *env,