int mdc_fid_alloc(const struct lu_env *env, struct obd_export *exp,
struct lu_fid *fid, struct md_op_data *op_data);
int mdc_setup(struct obd_device *obd, struct lustre_cfg *cfg);
-int mdc_process_config(struct obd_device *obd, size_t len, void *buf);
struct obd_client_handle;