-struct thandle *mdt_trans_create(const struct lu_env *env,
- struct mdt_device *mdt);
-int mdt_trans_start(const struct lu_env *env, struct mdt_device *mdt,
- struct thandle *th);
-void mdt_trans_stop(const struct lu_env *env,
- struct mdt_device *mdt, struct thandle *th);
-int mdt_record_write(const struct lu_env *env,
- struct dt_object *dt, const struct lu_buf *buf,
- loff_t *pos, struct thandle *th);
-int mdt_record_read(const struct lu_env *env,
- struct dt_object *dt, struct lu_buf *buf, loff_t *pos);
-