public void DecrementReferenceCount(BackupSetReference backupsetname, byte[] blobhash, BlobLocation.BlobType blobtype,
bool includefiles)
{
BlobLocation rootBlobLocation = GetBlobLocation(blobhash);
if (rootBlobLocation.GetBSetReferenceCount(backupsetname) == 1) // To be deleted?
{
IBlobReferenceIterator blobReferences = GetAllBlobReferences(blobhash, blobtype, includefiles, false);
foreach (var reference in blobReferences)
{
BlobLocation blocation = GetBlobLocation(reference);
// When we finish iterating over the children, decrement this blob
blobReferences.PostOrderAction(() => IncrementReferenceCountNoRecurse(backupsetname, blocation, reference, -1));
try
{
if (blocation.GetBSetReferenceCount(backupsetname) != 1) // Not to be deleted?
{
// Dont need to decrement child references if this wont be deleted
blobReferences.SkipChildrenOfCurrent();
}
}
catch (KeyNotFoundException)
{
throw;
}
}
}
IncrementReferenceCountNoRecurse(backupsetname, rootBlobLocation, blobhash, -1); // must delete parent last so parent can be loaded/used in GetAllBlobReferences()
}
public void TransferBlobAndReferences(BlobStore dst, string dstbackupset, byte[] blobhash,
BlobLocation.BlobType blobtype, bool includefiles)
{
BlobLocation rootDstBlobLocation;
try
{
rootDstBlobLocation = dst.GetBlobLocation(blobhash);
}
catch (KeyNotFoundException)
{
byte[] blob;
(rootDstBlobLocation, blob) = TransferBlobNoReferences(dst, dstbackupset, blobhash, GetBlobLocation(blobhash));
IBlobReferenceIterator blobReferences = GetAllBlobReferences(blobhash, blobtype, includefiles, false);
blobReferences.SupplyData(blob);
foreach (var reference in blobReferences)
{
BlobLocation dstBlobLocation;
try
{
dstBlobLocation = dst.GetBlobLocation(reference);
// Dont need to increment child references if this already exists
blobReferences.SkipChildren();
}
catch (KeyNotFoundException)
{
(dstBlobLocation, blob) = TransferBlobNoReferences(dst, dstbackupset, reference, GetBlobLocation(reference));
blobReferences.SupplyData(blob);
}
// When we finish iterating over the children, increment this blob
blobReferences.PostOrderAction(() => dst.IncrementReferenceCountNoRecurse(dstbackupset, dstBlobLocation, reference, 1));
}
}
dst.IncrementReferenceCountNoRecurse(dstbackupset, rootDstBlobLocation, blobhash, 1);
}
// TODO: If include files is false, should we require dstbackupset.EndsWith(Core.ShallowSuffix)?
public void TransferBlobAndReferences(BlobStore dst, BackupSetReference dstbackupset, byte[] blobhash,
BlobLocation.BlobType blobtype, bool includefiles)
{
bool refInDst;
bool shallowInDst;
BlobLocation?rootDstBlobLocation = null;
try
{
rootDstBlobLocation = dst.GetBlobLocation(blobhash);
refInDst = true;
shallowInDst = rootDstBlobLocation.TotalNonShallowReferenceCount == 0;
}
catch (KeyNotFoundException)
{
refInDst = false;
shallowInDst = false; // Meaningless when ref not in dst
}
if (!refInDst || (shallowInDst && includefiles))
{
byte[]? blob;
if (refInDst)
{
blob = RetrieveData(blobhash);
}
else
{
(rootDstBlobLocation, blob) = TransferBlobNoReferences(dst, dstbackupset, blobhash, GetBlobLocation(blobhash));
}
IBlobReferenceIterator blobReferences = GetAllBlobReferences(blobhash, blobtype, includefiles, false);
blobReferences.SupplyData(blob);
foreach (var reference in blobReferences)
{
bool iterRefInDst;
bool iterShallowInDst;
BlobLocation?dstBlobLocation = null;
try
{
dstBlobLocation = dst.GetBlobLocation(reference);
iterRefInDst = true;
iterShallowInDst = dstBlobLocation.TotalNonShallowReferenceCount == 0;
}
catch (KeyNotFoundException)
{
iterRefInDst = false;
iterShallowInDst = false; // Meaningless when ref not in dst
}
if (!iterRefInDst || (iterShallowInDst && includefiles))
{
if (iterRefInDst)
{
blob = RetrieveData(reference);
}
else
{
(dstBlobLocation, blob) = TransferBlobNoReferences(dst, dstbackupset, reference, GetBlobLocation(reference));
}
blobReferences.SupplyData(blob);
}
else
{
// Dont need to increment child references if this already exists
blobReferences.SkipChildrenOfCurrent();
}
//if (!iterRefInDst) // Don't increment child reference if already present?
//{
// When we finish iterating over the children, increment this blob
#pragma warning disable CS8604 // Possible null reference argument.
blobReferences.PostOrderAction(() => dst.IncrementReferenceCountNoRecurse(dstbackupset, dstBlobLocation, reference, 1));
#pragma warning restore CS8604 // Possible null reference argument.
//}
}
}
#pragma warning disable CS8604 // Possible null reference argument.
dst.IncrementReferenceCountNoRecurse(dstbackupset, rootDstBlobLocation, blobhash, 1);
#pragma warning restore CS8604 // Possible null reference argument.
}