/// <summary>
/// Creates a new stream that contains the XVA image.
/// </summary>
/// <returns>The new stream.</returns>
public override SparseStream Build()
{
TarFileBuilder tarBuilder = new TarFileBuilder();
int[] diskIds;
string ovaFileContent = GenerateOvaXml(out diskIds);
tarBuilder.AddFile("ova.xml", Encoding.ASCII.GetBytes(ovaFileContent));
int diskIdx = 0;
foreach (var diskRec in _disks)
{
SparseStream diskStream = diskRec.Second;
List<StreamExtent> extents = new List<StreamExtent>(diskStream.Extents);
int lastChunkAdded = -1;
foreach (StreamExtent extent in extents)
{
int firstChunk = (int)(extent.Start / Sizes.OneMiB);
int lastChunk = (int)((extent.Start + extent.Length - 1) / Sizes.OneMiB);
for (int i = firstChunk; i <= lastChunk; ++i)
{
if (i != lastChunkAdded)
{
HashAlgorithm hashAlg = new SHA1Managed();
Stream chunkStream;
long diskBytesLeft = diskStream.Length - (i * Sizes.OneMiB);
if (diskBytesLeft < Sizes.OneMiB)
{
chunkStream = new ConcatStream(
Ownership.Dispose,
new SubStream(diskStream, i * Sizes.OneMiB, diskBytesLeft),
new ZeroStream(Sizes.OneMiB - diskBytesLeft));
}
else
{
chunkStream = new SubStream(diskStream, i * Sizes.OneMiB, Sizes.OneMiB);
}
HashStream chunkHashStream = new HashStream(chunkStream, Ownership.Dispose, hashAlg);
tarBuilder.AddFile(string.Format(CultureInfo.InvariantCulture, "Ref:{0}/{1:D8}", diskIds[diskIdx], i), chunkHashStream);
tarBuilder.AddFile(string.Format(CultureInfo.InvariantCulture, "Ref:{0}/{1:D8}.checksum", diskIds[diskIdx], i), new ChecksumStream(hashAlg));
lastChunkAdded = i;
}
}
}
// Make sure the last chunk is present, filled with zero's if necessary
int lastActualChunk = (int)((diskStream.Length - 1) / Sizes.OneMiB);
if (lastChunkAdded < lastActualChunk)
{
HashAlgorithm hashAlg = new SHA1Managed();
Stream chunkStream = new ZeroStream(Sizes.OneMiB);
HashStream chunkHashStream = new HashStream(chunkStream, Ownership.Dispose, hashAlg);
tarBuilder.AddFile(string.Format(CultureInfo.InvariantCulture, "Ref:{0}/{1:D8}", diskIds[diskIdx], lastActualChunk), chunkHashStream);
tarBuilder.AddFile(string.Format(CultureInfo.InvariantCulture, "Ref:{0}/{1:D8}.checksum", diskIds[diskIdx], lastActualChunk), new ChecksumStream(hashAlg));
}
++diskIdx;
}
return tarBuilder.Build();
}
/// <summary>
/// Creates a new stream that contains the XVA image.
/// </summary>
/// <returns>The new stream</returns>
public override SparseStream Build()
{
TarFileBuilder tarBuilder = new TarFileBuilder();
int[] diskIds;
string ovaFileContent = GenerateOvaXml(out diskIds);
tarBuilder.AddFile("ova.xml", Encoding.ASCII.GetBytes(ovaFileContent));
int diskIdx = 0;
foreach (var diskRec in _disks)
{
SparseStream diskStream = diskRec.Second;
List <StreamExtent> extents = new List <StreamExtent>(diskStream.Extents);
int lastChunkAdded = -1;
foreach (StreamExtent extent in extents)
{
int firstChunk = (int)(extent.Start / Sizes.OneMiB);
int lastChunk = (int)((extent.Start + extent.Length - 1) / Sizes.OneMiB);
for (int i = firstChunk; i <= lastChunk; ++i)
{
if (i != lastChunkAdded)
{
HashAlgorithm hashAlg = new SHA1Managed();
Stream chunkStream;
long diskBytesLeft = diskStream.Length - (i * Sizes.OneMiB);
if (diskBytesLeft < Sizes.OneMiB)
{
chunkStream = new ConcatStream(
Ownership.Dispose,
new SubStream(diskStream, i * Sizes.OneMiB, diskBytesLeft),
new ZeroStream(Sizes.OneMiB - diskBytesLeft));
}
else
{
chunkStream = new SubStream(diskStream, i * Sizes.OneMiB, Sizes.OneMiB);
}
HashStream chunkHashStream = new HashStream(chunkStream, Ownership.Dispose, hashAlg);
tarBuilder.AddFile(string.Format(CultureInfo.InvariantCulture, "Ref:{0}/{1:D8}", diskIds[diskIdx], i), chunkHashStream);
tarBuilder.AddFile(string.Format(CultureInfo.InvariantCulture, "Ref:{0}/{1:D8}.checksum", diskIds[diskIdx], i), new ChecksumStream(hashAlg));
lastChunkAdded = i;
}
}
}
// Make sure the last chunk is present, filled with zero's if necessary
int lastActualChunk = (int)((diskStream.Length - 1) / Sizes.OneMiB);
if (lastChunkAdded < lastActualChunk)
{
HashAlgorithm hashAlg = new SHA1Managed();
Stream chunkStream = new ZeroStream(Sizes.OneMiB);
HashStream chunkHashStream = new HashStream(chunkStream, Ownership.Dispose, hashAlg);
tarBuilder.AddFile(string.Format(CultureInfo.InvariantCulture, "Ref:{0}/{1:D8}", diskIds[diskIdx], lastActualChunk), chunkHashStream);
tarBuilder.AddFile(string.Format(CultureInfo.InvariantCulture, "Ref:{0}/{1:D8}.checksum", diskIds[diskIdx], lastActualChunk), new ChecksumStream(hashAlg));
}
++diskIdx;
}
return(tarBuilder.Build());
}
