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Fix integrity verification performance regression

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Integrity verification would always be done on savedata, even when not needed
This commit is contained in:
Alex Barney 2019-03-11 23:26:54 -05:00
parent 06fda75ab9
commit 1110c32cb1
1 changed files with 16 additions and 13 deletions
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23
src/LibHac/IO/IntegrityVerificationStorage.cs
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@ -31,7 +31,6 @@ namespace LibHac.IO
BlockValidities = new Validity[SectorCount];
}
// todo Take short path when integrity checks are disabled
private void ReadImpl(Span<byte> destination, long offset, IntegrityCheckLevel integrityCheckLevel)
{
int count = destination.Length;
@ -39,8 +38,6 @@ namespace LibHac.IO
if (count < 0 || count > SectorSize)
throw new ArgumentOutOfRangeException(nameof(destination), "Length is invalid.");
long blockIndex = offset / SectorSize;
if (BlockValidities[blockIndex] == Validity.Invalid && integrityCheckLevel == IntegrityCheckLevel.ErrorOnInvalid)
@ -48,13 +45,10 @@ namespace LibHac.IO
throw new InvalidDataException("Hash error!");
}
if (Type != IntegrityStorageType.Save && integrityCheckLevel == IntegrityCheckLevel.None)
{
BaseStorage.Read(destination, offset);
return;
}
bool needsHashCheck = integrityCheckLevel != IntegrityCheckLevel.None &&
BlockValidities[blockIndex] == Validity.Unchecked;
if (BlockValidities[blockIndex] != Validity.Unchecked)
if (Type != IntegrityStorageType.Save && !needsHashCheck)
{
BaseStorage.Read(destination, offset);
return;
@ -64,13 +58,22 @@ namespace LibHac.IO
long hashPos = blockIndex * DigestSize;
HashStorage.Read(hashBuffer, hashPos);
if (Type == IntegrityStorageType.Save && Util.IsEmpty(hashBuffer))
if (Type == IntegrityStorageType.Save)
{
if (Util.IsEmpty(hashBuffer))
{
destination.Clear();
BlockValidities[blockIndex] = Validity.Valid;
return;
}
if (!needsHashCheck)
{
BaseStorage.Read(destination, offset);
return;
}
}
byte[] dataBuffer = ArrayPool<byte>.Shared.Rent(SectorSize);
try
{