public static VhdFooter CreateFixedDiskFooter(long virtualSize)
{
var helper = new AttributeHelper <VhdFooter>();
var footer = new VhdFooter();
var reservedAttribute = helper.GetAttribute(() => footer.Reserved);
footer.Cookie = VhdCookie.CreateFooterCookie();
footer.Features = VhdFeature.Reserved;
footer.FileFormatVersion = VhdFileFormatVersion.DefaultFileFormatVersion;
footer.HeaderOffset = VhdConstants.VHD_NO_DATA_LONG;
footer.TimeStamp = DateTime.UtcNow;
footer.CreatorApplication = WindowsAzureCreatorApplicationName;
footer.CreatorVersion = VhdCreatorVersion.CSUP2011;
footer.CreatorHostOsType = HostOsType.Windows;
footer.PhsyicalSize = virtualSize;
footer.VirtualSize = virtualSize;
footer.DiskGeometry = DiskGeometry.CreateFromVirtualSize(virtualSize);
footer.DiskType = DiskType.Fixed;
footer.UniqueId = Guid.NewGuid();
footer.SavedState = false;
footer.Reserved = new byte[reservedAttribute.Size];
var footerSerializer = new VhdFooterSerializer(footer);
var byteArray = footerSerializer.ToByteArray();
using (var memoryStream = new MemoryStream(byteArray))
{
var binaryReader = new BinaryReader(memoryStream);
var vhdDataReader = new VhdDataReader(binaryReader);
var footerFactory = new VhdFooterFactory(vhdDataReader);
var vhdFooter = footerFactory.CreateFooter();
return(vhdFooter);
}
}
private VhdCookie CreateVhdCookie(byte[] cookie)
{
var vhdCookie = new VhdCookie(VhdCookieType.Footer, cookie);
if (!vhdCookie.IsValid())
{
throw new VhdParsingException(String.Format("Invalid Vhd footer cookie:{0}", vhdCookie.StringData));
}
return(vhdCookie);
}
private VhdCookie EndReadHeaderCookie(IAsyncResult result)
{
var value = dataReader.EndReadBytes(result);
var vhdCookie = new VhdCookie(VhdCookieType.Header, value);
if (!vhdCookie.IsValid())
{
throw new VhdParsingException(String.Format("unsupported format, Cookie:{0}", vhdCookie));
}
return(vhdCookie);
}
private VhdCookie ReadHeaderCookie(VhdPropertyAttribute attribute)
{
var cookie = dataReader.ReadBytes(headerOffset + attribute.Offset, attribute.Size);
var vhdCookie = new VhdCookie(VhdCookieType.Header, cookie);
if (!vhdCookie.IsValid())
{
throw new VhdParsingException(String.Format("unsupported format, Cookie:{0}", vhdCookie));
}
return(vhdCookie);
}
