/// <summary>
/// Initializes a new instance of the Disk class. Differencing disks are supported.
/// </summary>
/// <param name="path">The path to the disk image</param>
/// <param name="access">The access requested to the disk</param>
public Disk(string path, FileAccess access)
{
DiskImageFile file = new DiskImageFile(path, access);
_files = new List<ThinkAway.Tuple<DiskImageFile, Ownership>>();
_files.Add(new ThinkAway.Tuple<DiskImageFile, Ownership>(file, Ownership.Dispose));
ResolveFileChain();
}
/// <summary>
/// Initializes a new instance of the Disk class. Differencing disks are supported.
/// </summary>
/// <param name="fileSystem">The file system containing the disk.</param>
/// <param name="path">The file system relative path to the disk.</param>
/// <param name="access">The access requested to the disk.</param>
public Disk(DiscFileSystem fileSystem, string path, FileAccess access)
{
FileLocator fileLocator = new DiscFileLocator(fileSystem, Utilities.GetDirectoryFromPath(path));
DiskImageFile file = new DiskImageFile(fileLocator, Utilities.GetFileFromPath(path), access);
_files = new List<ThinkAway.Tuple<DiskImageFile, Ownership>>();
_files.Add(new ThinkAway.Tuple<DiskImageFile, Ownership>(file, Ownership.Dispose));
ResolveFileChain();
}
private void ResolveFileChain()
{
DiskImageFile file = _files[_files.Count - 1].First;
while (file.NeedsParent)
{
FileLocator fileLocator = file.RelativeFileLocator;
bool found = false;
foreach (string testPath in file.GetParentLocations())
{
if (fileLocator.Exists(testPath))
{
DiskImageFile newFile = new DiskImageFile(fileLocator, testPath, FileAccess.Read);
if (newFile.UniqueId != file.ParentUniqueId)
{
throw new IOException(string.Format(CultureInfo.InstalledUICulture, "Invalid disk chain found looking for parent with id {0}, found {1} with id {2}", file.ParentUniqueId, newFile.FullPath, newFile.UniqueId));
}
file = newFile;
_files.Add(new ThinkAway.Tuple<DiskImageFile, Ownership>(file, Ownership.Dispose));
found = true;
break;
}
}
if (!found)
{
throw new IOException(string.Format(CultureInfo.InvariantCulture, "Failed to find parent for disk '{0}'", file.FullPath));
}
}
}
/// <summary>
/// Creates a new VHDX differencing disk file.
/// </summary>
/// <param name="path">The path to the new disk file</param>
/// <param name="parentPath">The path to the parent disk file</param>
/// <returns>An object that accesses the new file as a Disk</returns>
public static Disk InitializeDifferencing(string path, string parentPath)
{
LocalFileLocator parentLocator = new LocalFileLocator(Path.GetDirectoryName(parentPath));
string parentFileName = Path.GetFileName(parentPath);
DiskImageFile newFile;
using (DiskImageFile parent = new DiskImageFile(parentLocator, parentFileName, FileAccess.Read))
{
LocalFileLocator locator = new LocalFileLocator(Path.GetDirectoryName(path));
newFile = parent.CreateDifferencing(locator, Path.GetFileName(path));
}
return new Disk(newFile, Ownership.Dispose, parentLocator, parentFileName);
}
/// <summary>
/// Initializes a stream as a differencing disk VHDX file.
/// </summary>
/// <param name="stream">The stream to initialize.</param>
/// <param name="ownsStream">Indicates if the new instance controls the lifetime of the <paramref name="stream"/>.</param>
/// <param name="parent">The disk this file is a different from.</param>
/// <param name="ownsParent">Indicates if the new instance controls the lifetime of the <paramref name="parent"/> file.</param>
/// <param name="parentAbsolutePath">The full path to the parent disk.</param>
/// <param name="parentRelativePath">The relative path from the new disk to the parent disk.</param>
/// <param name="parentModificationTime">The time the parent disk's file was last modified (from file system).</param>
/// <returns>An object that accesses the stream as a VHDX file</returns>
public static Disk InitializeDifferencing(
Stream stream,
Ownership ownsStream,
DiskImageFile parent,
Ownership ownsParent,
string parentAbsolutePath,
string parentRelativePath,
DateTime parentModificationTime)
{
DiskImageFile file = DiskImageFile.InitializeDifferencing(stream, ownsStream, parent, parentAbsolutePath, parentRelativePath, parentModificationTime);
return new Disk(file, Ownership.Dispose, parent, ownsParent);
}
/// <summary>
/// Initializes a new instance of the Disk class. Differencing disks are supported.
/// </summary>
/// <param name="file">The file containing the disk</param>
/// <param name="ownsFile">Indicates if the new instance should control the lifetime of the file.</param>
/// <param name="parentLocator">Object used to locate the parent disk</param>
/// <param name="parentPath">Path to the parent disk (if required)</param>
private Disk(DiskImageFile file, Ownership ownsFile, FileLocator parentLocator, string parentPath)
{
_files = new List<ThinkAway.Tuple<DiskImageFile, Ownership>>();
_files.Add(new ThinkAway.Tuple<DiskImageFile, Ownership>(file, ownsFile));
if (file.NeedsParent)
{
_files.Add(
new ThinkAway.Tuple<DiskImageFile, Ownership>(
new DiskImageFile(parentLocator, parentPath, FileAccess.Read),
Ownership.Dispose));
ResolveFileChain();
}
}
/// <summary>
/// Initializes a new instance of the Disk class. Differencing disks are supported.
/// </summary>
/// <param name="file">The file containing the disk</param>
/// <param name="ownsFile">Indicates if the new instance should control the lifetime of the file.</param>
/// <param name="parentFile">The file containing the disk's parent</param>
/// <param name="ownsParent">Indicates if the new instance should control the lifetime of the parentFile</param>
private Disk(DiskImageFile file, Ownership ownsFile, DiskImageFile parentFile, Ownership ownsParent)
{
_files = new List<ThinkAway.Tuple<DiskImageFile, Ownership>>();
_files.Add(new ThinkAway.Tuple<DiskImageFile, Ownership>(file, ownsFile));
if (file.NeedsParent)
{
_files.Add(new ThinkAway.Tuple<DiskImageFile, Ownership>(parentFile, ownsParent));
ResolveFileChain();
}
else
{
if (parentFile != null && ownsParent == Ownership.Dispose)
{
parentFile.Dispose();
}
}
}
/// <summary>
/// Initializes a new instance of the Disk class. Differencing disks are not supported.
/// </summary>
/// <param name="file">The file containing the disk</param>
/// <param name="ownsFile">Indicates if the new instance should control the lifetime of the file.</param>
private Disk(DiskImageFile file, Ownership ownsFile)
{
_files = new List<ThinkAway.Tuple<DiskImageFile, Ownership>>();
_files.Add(new ThinkAway.Tuple<DiskImageFile, Ownership>(file, ownsFile));
ResolveFileChain();
}
/// <summary>
/// Initializes a new instance of the Disk class. Differencing disks are supported.
/// </summary>
/// <param name="locator">The locator to access relative files</param>
/// <param name="path">The path to the disk image</param>
/// <param name="access">The access requested to the disk</param>
internal Disk(FileLocator locator, string path, FileAccess access)
{
DiskImageFile file = new DiskImageFile(locator, path, access);
_files = new List<ThinkAway.Tuple<DiskImageFile, Ownership>>();
_files.Add(new ThinkAway.Tuple<DiskImageFile, Ownership>(file, Ownership.Dispose));
ResolveFileChain();
}
private static void InitializeDifferencingInternal(Stream stream, DiskImageFile parent, string parentAbsolutePath, string parentRelativePath, DateTime parentModificationTimeUtc)
{
throw new NotImplementedException();
}
internal static DiskImageFile InitializeDynamic(FileLocator locator, string path, long capacity, Geometry geometry, long blockSize)
{
DiskImageFile result = null;
Stream stream = locator.Open(path, FileMode.Create, FileAccess.ReadWrite, FileShare.None);
try
{
InitializeDynamicInternal(stream, capacity, geometry, blockSize);
result = new DiskImageFile(locator, path, stream, Ownership.Dispose);
stream = null;
}
finally
{
if (stream != null)
{
stream.Dispose();
}
}
return result;
}
/// <summary>
/// Initializes a stream as a differencing disk VHDX file.
/// </summary>
/// <param name="stream">The stream to initialize.</param>
/// <param name="ownsStream">Indicates if the new instance controls the lifetime of the stream.</param>
/// <param name="parent">The disk this file is a different from.</param>
/// <param name="parentAbsolutePath">The full path to the parent disk.</param>
/// <param name="parentRelativePath">The relative path from the new disk to the parent disk.</param>
/// <param name="parentModificationTimeUtc">The time the parent disk's file was last modified (from file system).</param>
/// <returns>An object that accesses the stream as a VHDX file</returns>
public static DiskImageFile InitializeDifferencing(
Stream stream,
Ownership ownsStream,
DiskImageFile parent,
string parentAbsolutePath,
string parentRelativePath,
DateTime parentModificationTimeUtc)
{
InitializeDifferencingInternal(stream, parent, parentAbsolutePath, parentRelativePath, parentModificationTimeUtc);
return new DiskImageFile(stream, ownsStream);
}
