/* ptlrpc handle for MDS->client connections (for lock ASTs). */
struct ptlrpc_client *mdt_ldlm_client;
/* underlying device */
+ struct obd_export *mdt_child_exp;
struct md_device *mdt_child;
struct dt_device *mdt_bottom;
+ struct obd_export *mdt_bottom_exp;
/** target device */
struct lu_target mdt_lut;
/*