AllocInfo inf;
        switch ( this.informationLevel ) {
        case FileSystemInformation.SMB_INFO_ALLOCATION:
            inf = new SmbInfoAllocation();
            break;
        case FileSystemInformation.FS_SIZE_INFO:
            inf = new FileFsSizeInformation();
            break;
        case FileSystemInformation.FS_FULL_SIZE_INFO:
            inf = new FileFsFullSizeInformation();

        switch( informationLevel ) {
            case SMB_INFO_ALLOCATION:
                return readSmbInfoAllocationWireFormat( buffer, bufferIndex );
            case SMB_QUERY_FS_SIZE_INFO:
                return readSmbQueryFSSizeInfoWireFormat( buffer, bufferIndex );
            case SMB_FS_FULL_SIZE_INFORMATION:
                return readFsFullSizeInformationWireFormat( buffer, bufferIndex );