public PhysicalVolume(PhysicalVolumeLabel physicalVolumeLabel, Stream content)
{
PhysicalVolumeLabel = physicalVolumeLabel;
PvHeader = new PvHeader();
content.Position = (long)(physicalVolumeLabel.Sector * SECTOR_SIZE);
var buffer = Utilities.ReadFully(content, SECTOR_SIZE);
PvHeader.ReadFrom(buffer, (int)physicalVolumeLabel.Offset);
if (PvHeader.MetadataDiskAreas.Length > 0)
{
var area = PvHeader.MetadataDiskAreas[0];
var metadata = new VolumeGroupMetadata();
content.Position = (long)area.Offset;
buffer = Utilities.ReadFully(content, (int)area.Length);
metadata.ReadFrom(buffer, 0x0);
VgMetadata = metadata;
}
Content = content;
}
private static bool SearchLabel(Stream content, out PhysicalVolumeLabel pvLabel)
{
pvLabel = null;
content.Position = 0;
byte[] buffer = new byte[SECTOR_SIZE];
for (uint i = 0; i < 4; i++)
{
if (StreamUtilities.ReadMaximum(content, buffer, 0, SECTOR_SIZE) != SECTOR_SIZE)
{
return(false);
}
var label = EndianUtilities.BytesToString(buffer, 0x0, 0x8);
if (label == PhysicalVolumeLabel.LABEL_ID)
{
pvLabel = new PhysicalVolumeLabel();
pvLabel.ReadFrom(buffer, 0x0);
if (pvLabel.Sector != i)
{
//Invalid PV Sector;
return(false);
}
if (pvLabel.Crc != pvLabel.CalculatedCrc)
{
//Invalid PV CRC
return(false);
}
if (pvLabel.Label2 != PhysicalVolumeLabel.LVM2_LABEL)
{
//Invalid LVM2 Label
return(false);
}
return(true);
}
}
return(false);
}