internal HResult GetPlaceholderInfoCallback(
int commandId,
string relativePath,
uint triggeringProcessId,
string triggeringProcessImageFileName)
{
Log.Information("----> GetPlaceholderInfoCallback [{Path}]", relativePath);
Log.Information(" Placeholder creation triggered by [{ProcName} {PID}]", triggeringProcessImageFileName, triggeringProcessId);
HResult hr = HResult.Ok;
ProjectedFileInfo fileInfo = this.GetFileInfoInLayer(relativePath);
if (fileInfo == null)
{
hr = HResult.FileNotFound;
}
else
{
hr = this.virtualizationInstance.WritePlaceholderInfo(
relativePath: Path.Combine(Path.GetDirectoryName(relativePath), fileInfo.Name),
creationTime: fileInfo.CreationTime,
lastAccessTime: fileInfo.LastAccessTime,
lastWriteTime: fileInfo.LastWriteTime,
changeTime: fileInfo.ChangeTime,
fileAttributes: fileInfo.Attributes,
endOfFile: fileInfo.Size,
isDirectory: fileInfo.IsDirectory,
contentId: new byte[] { 0 },
providerId: new byte[] { 1 });
}
Log.Information("<---- GetPlaceholderInfoCallback {Result}", hr);
return(hr);
}
private bool FileOrDirectoryExistsInLayer(string layerParentPath, string layerName, out ProjectedFileInfo fileInfo)
{
fileInfo = null;
// Check whether the parent directory exists in the layer.
DirectoryInfo dirInfo = new DirectoryInfo(layerParentPath);
if (!dirInfo.Exists)
{
return(false);
}
// Get the FileSystemInfo for the entry in the layer that matches the name, using ProjFS's
// name matching rules.
FileSystemInfo fileSystemInfo =
dirInfo
.GetFileSystemInfos()
.FirstOrDefault(fsInfo => Utils.IsFileNameMatch(fsInfo.Name, layerName));
if (fileSystemInfo == null)
{
return(false);
}
bool isDirectory = ((fileSystemInfo.Attributes & FileAttributes.Directory) == FileAttributes.Directory);
fileInfo = new ProjectedFileInfo(
name: fileSystemInfo.Name,
size: isDirectory ? 0 : new FileInfo(Path.Combine(layerParentPath, layerName)).Length,
isDirectory: isDirectory,
creationTime: fileSystemInfo.CreationTime,
lastAccessTime: fileSystemInfo.LastAccessTime,
lastWriteTime: fileSystemInfo.LastWriteTime,
changeTime: fileSystemInfo.LastWriteTime,
attributes: fileSystemInfo.Attributes);
return(true);
}
internal HResult GetDirectoryEnumerationCallback(
int commandId,
Guid enumerationId,
string filterFileName,
bool restartScan,
IDirectoryEnumerationResults enumResult)
{
Log.Information("----> GetDirectoryEnumerationCallback filterFileName [{Filter}]", filterFileName);
// Find the requested enumeration. It should have been put there by StartDirectoryEnumeration.
if (!this.activeEnumerations.TryGetValue(enumerationId, out ActiveEnumeration enumeration))
{
return(HResult.InternalError);
}
if (restartScan)
{
// The caller is restarting the enumeration, so we reset our ActiveEnumeration to the
// first item that matches filterFileName. This also saves the value of filterFileName
// into the ActiveEnumeration, overwriting its previous value.
enumeration.RestartEnumeration(filterFileName);
}
else
{
// The caller is continuing a previous enumeration, or this is the first enumeration
// so our ActiveEnumeration is already at the beginning. TrySaveFilterString()
// will save filterFileName if it hasn't already been saved (only if the enumeration
// is restarting do we need to re-save filterFileName).
enumeration.TrySaveFilterString(filterFileName);
}
bool entryAdded = false;
HResult hr = HResult.Ok;
while (enumeration.IsCurrentValid)
{
ProjectedFileInfo fileInfo = enumeration.Current;
if (enumResult.Add(
fileName: fileInfo.Name,
fileSize: fileInfo.Size,
isDirectory: fileInfo.IsDirectory,
fileAttributes: fileInfo.Attributes,
creationTime: fileInfo.CreationTime,
lastAccessTime: fileInfo.LastAccessTime,
lastWriteTime: fileInfo.LastWriteTime,
changeTime: fileInfo.ChangeTime))
{
entryAdded = true;
enumeration.MoveNext();
}
else
{
if (entryAdded)
{
hr = HResult.Ok;
}
else
{
hr = HResult.InsufficientBuffer;
}
break;
}
}
Log.Information("<---- GetDirectoryEnumerationCallback {Result}", hr);
return(hr);
}
