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[NTFS] - Add GetAllocationOffsetFromVCN() function, which was mistakenly left out of the last commit.

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svn path=/branches/GSoC_2016/NTFS/; revision=75425
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Trevor Thompson 2017-07-27 18:34:23 +00:00 committed by Thomas Faber
parent 5579428b4f
commit b1eab36f6b
1 changed files with 12 additions and 0 deletions
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12
drivers/filesystems/ntfs/btree.c
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@ -511,6 +511,18 @@ DumpBTree(PB_TREE Tree)
DumpBTreeNode(Tree->RootNode, 0, 0); DumpBTreeNode(Tree->RootNode, 0, 0);
} }
// Calculates start of Index Buffer relative to the index allocation, given the node's VCN
ULONGLONG
GetAllocationOffsetFromVCN(PDEVICE_EXTENSION DeviceExt,
ULONG IndexBufferSize,
ULONGLONG Vcn)
{
if (IndexBufferSize < DeviceExt->NtfsInfo.BytesPerCluster)
return Vcn * DeviceExt->NtfsInfo.BytesPerSector;
return Vcn * DeviceExt->NtfsInfo.BytesPerCluster;
}
/** /**
* @name NtfsInsertKey * @name NtfsInsertKey
* @implemented * @implemented