mirror of
https://github.com/winfsp/winfsp.git
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1740 lines
64 KiB
C#
1740 lines
64 KiB
C#
/**
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* @file Program.cs
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*
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* @copyright 2015-2017 Bill Zissimopoulos
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*/
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/*
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* This file is part of WinFsp.
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*
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* You can redistribute it and/or modify it under the terms of the GNU
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* General Public License version 3 as published by the Free Software
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* Foundation.
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*
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* Licensees holding a valid commercial license may use this file in
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* accordance with the commercial license agreement provided with the
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* software.
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*/
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Runtime.InteropServices;
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using System.Security.AccessControl;
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using Fsp;
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using VolumeInfo = Fsp.Interop.VolumeInfo;
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using FileInfo = Fsp.Interop.FileInfo;
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namespace memfs
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{
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class FileNode
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{
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public FileNode(String FileName)
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{
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this.FileName = FileName;
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FileInfo.CreationTime =
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FileInfo.LastAccessTime =
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FileInfo.LastWriteTime =
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FileInfo.ChangeTime = (UInt64)DateTime.Now.ToFileTimeUtc();
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FileInfo.IndexNumber = IndexNumber++;
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}
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public FileInfo GetFileInfo()
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{
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if (null == MainFileNode)
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return this.FileInfo;
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else
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{
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FileInfo FileInfo = MainFileNode.FileInfo;
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FileInfo.FileAttributes &= ~(UInt32)FileAttributes.Directory;
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/* named streams cannot be directories */
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FileInfo.AllocationSize = this.FileInfo.AllocationSize;
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FileInfo.FileSize = this.FileInfo.FileSize;
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return FileInfo;
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}
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}
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private static UInt64 IndexNumber = 1;
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public String FileName;
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public FileInfo FileInfo;
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public Byte[] FileSecurity;
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public Byte[] FileData;
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public Byte[] ReparseData;
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public FileNode MainFileNode;
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public int OpenCount;
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}
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class FileNodeMap
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{
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public FileNodeMap(Boolean CaseInsensitive)
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{
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this.CaseInsensitive = CaseInsensitive;
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StringComparer Comparer = CaseInsensitive ?
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StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal;
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Set = new SortedSet<String>(Comparer);
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Map = new Dictionary<String, FileNode>(Comparer);
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}
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public UInt32 Count()
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{
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return (UInt32)Map.Count;
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}
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public FileNode Get(String FileName)
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{
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return Map[FileName];
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}
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public FileNode GetMain(String FileName)
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{
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int Index = FileName.IndexOf(':');
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if (0 > Index)
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return null;
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return Map[FileName.Substring(0, Index)];
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}
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public FileNode GetParent(String FileName, out Int32 Result)
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{
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FileNode FileNode = Map[Path.GetDirectoryName(FileName)];
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if (null == FileNode)
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{
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Result = FileSystemBase.STATUS_OBJECT_PATH_NOT_FOUND;
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return null;
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}
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if (0 == (FileNode.FileInfo.FileAttributes & (UInt32)FileAttributes.Directory))
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{
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Result = FileSystemBase.STATUS_NOT_A_DIRECTORY;
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return null;
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}
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Result = FileSystemBase.STATUS_SUCCESS;
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return FileNode;
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}
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public void TouchParent(FileNode FileNode)
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{
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if ("\\" == FileNode.FileName)
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return;
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Int32 Result;
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FileNode Parent = GetParent(FileNode.FileName, out Result);
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if (null == Parent)
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return;
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Parent.FileInfo.LastAccessTime =
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Parent.FileInfo.LastWriteTime =
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Parent.FileInfo.ChangeTime = (UInt64)DateTime.Now.ToFileTimeUtc();
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}
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public void Insert(FileNode FileNode)
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{
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Set.Add(FileNode.FileName);
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Map.Add(FileNode.FileName, FileNode);
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TouchParent(FileNode);
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}
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public void Remove(FileNode FileNode)
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{
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if (Set.Remove(FileNode.FileName))
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{
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Map.Remove(FileNode.FileName);
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TouchParent(FileNode);
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}
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}
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public Boolean HasChild(FileNode FileNode)
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{
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String MinName = FileNode.FileName + "\\";
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String MaxName = FileNode.FileName + "]";
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SortedSet<String> View = Set.GetViewBetween(MinName, MaxName);
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foreach (String Name in View)
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if (Name.StartsWith(MinName, CaseInsensitive ?
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StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal))
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return true;
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return false;
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}
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public IEnumerable<String> GetChildrenFileNames(FileNode FileNode)
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{
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String MinName = FileNode.FileName + "\\";
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String MaxName = FileNode.FileName + "]";
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SortedSet<String> View = Set.GetViewBetween(MinName, MaxName);
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foreach (String Name in View)
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if (Name.StartsWith(MinName, CaseInsensitive ?
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StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal))
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yield return Name;
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}
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public IEnumerable<String> GetStreamFileNames(FileNode FileNode)
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{
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String MinName = FileNode.FileName + ":";
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String MaxName = FileNode.FileName + ";";
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SortedSet<String> View = Set.GetViewBetween(MinName, MaxName);
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foreach (String Name in View)
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if (Name.StartsWith(MinName, CaseInsensitive ?
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StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal))
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yield return Name;
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}
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public IEnumerable<String> GetDescendantFileNames(FileNode FileNode)
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{
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String MinName = FileNode.FileName;
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String MaxName = FileNode.FileName + "]";
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SortedSet<String> View = Set.GetViewBetween(MinName, MaxName);
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foreach (String Name in View)
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if (Name.StartsWith(MinName, CaseInsensitive ?
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StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal) &&
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Name.Length == MinName.Length || (1 == MinName.Length && '\\' == MinName[0]) ||
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'\\' == Name[MinName.Length] || ':' == Name[MinName.Length])
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yield return Name;
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}
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public Boolean CaseInsensitive;
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private SortedSet<String> Set;
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private Dictionary<String, FileNode> Map;
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}
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class Memfs : FileSystemBase
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{
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public const UInt16 MEMFS_SECTOR_SIZE = 512;
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public const UInt16 MEMFS_SECTORS_PER_ALLOCATION_UNIT = 1;
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public Memfs(
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Boolean CaseInsensitive, UInt32 MaxFileNodes, UInt32 MaxFileSize, String RootSddl)
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{
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this.FileNodeMap = new FileNodeMap(CaseInsensitive);
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this.OpenNodeSet = new HashSet<FileNode>();
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this.MaxFileNodes = MaxFileNodes;
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this.MaxFileSize = MaxFileSize;
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/*
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* Create root directory.
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*/
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FileNode RootNode = new FileNode("\\");
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RootNode.FileInfo.FileAttributes = (UInt32)FileAttributes.Directory;
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if (null == RootSddl)
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RootSddl = "O:BAG:BAD:P(A;;FA;;;SY)(A;;FA;;;BA)(A;;FA;;;WD)";
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RawSecurityDescriptor RootSecurityDescriptor = new RawSecurityDescriptor(RootSddl);
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RootNode.FileSecurity = new Byte[RootSecurityDescriptor.BinaryLength];
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RootSecurityDescriptor.GetBinaryForm(RootNode.FileSecurity, 0);
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FileNodeMap.Insert(RootNode);
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}
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public override Int32 Init(Object Host0)
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{
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FileSystemHost Host = (FileSystemHost)Host0;
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Host.SectorSize = Memfs.MEMFS_SECTOR_SIZE;
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Host.SectorsPerAllocationUnit = Memfs.MEMFS_SECTORS_PER_ALLOCATION_UNIT;
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Host.VolumeCreationTime = (UInt64)DateTime.Now.ToFileTimeUtc();
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Host.VolumeSerialNumber = (UInt32)(Host.VolumeCreationTime / (10000 * 1000));
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Host.CaseSensitiveSearch = !FileNodeMap.CaseInsensitive;
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Host.CasePreservedNames = true;
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Host.UnicodeOnDisk = true;
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Host.PersistentAcls = true;
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Host.ReparsePoints = true;
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Host.ReparsePointsAccessCheck = false;
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Host.NamedStreams = true;
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Host.PostCleanupWhenModifiedOnly = true;
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return STATUS_SUCCESS;
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}
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public override Int32 GetVolumeInfo(
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out VolumeInfo VolumeInfo)
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{
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VolumeInfo = default(VolumeInfo);
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VolumeInfo.TotalSize = MaxFileNodes * (UInt64)MaxFileSize;
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VolumeInfo.FreeSize = (MaxFileNodes - FileNodeMap.Count()) * (UInt64)MaxFileSize;
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VolumeInfo.SetVolumeLabel(VolumeLabel);
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return STATUS_SUCCESS;
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}
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public override Int32 SetVolumeLabel(
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String VolumeLabel,
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out VolumeInfo VolumeInfo)
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{
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this.VolumeLabel = VolumeLabel;
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return GetVolumeInfo(out VolumeInfo);
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}
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public override Int32 GetSecurityByName(
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String FileName,
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out UInt32 FileAttributes/* or ReparsePointIndex */,
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ref Byte[] SecurityDescriptor)
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{
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FileNode FileNode = FileNodeMap.Get(FileName);
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if (null == FileNode)
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{
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Int32 Result = STATUS_OBJECT_NAME_NOT_FOUND;
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if (FindReparsePoint(FileName, out FileAttributes))
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Result = STATUS_REPARSE;
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else
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FileNodeMap.GetParent(FileName, out Result);
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return Result;
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}
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UInt32 FileAttributesMask = ~(UInt32)0;
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if (null != FileNode.MainFileNode)
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{
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FileAttributesMask = ~(UInt32)System.IO.FileAttributes.Directory;
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FileNode = FileNode.MainFileNode;
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}
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FileAttributes = FileNode.FileInfo.FileAttributes & FileAttributesMask;
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if (null != SecurityDescriptor)
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SecurityDescriptor = FileNode.FileSecurity;
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return STATUS_SUCCESS;
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}
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public override Int32 Create(
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String FileName,
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UInt32 CreateOptions,
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UInt32 GrantedAccess,
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UInt32 FileAttributes,
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Byte[] SecurityDescriptor,
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UInt64 AllocationSize,
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out Object FileNode0,
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out Object FileDesc,
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out FileInfo FileInfo,
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out String NormalizedName)
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{
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FileNode0 = default(Object);
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FileDesc = default(Object);
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FileInfo = default(FileInfo);
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NormalizedName = default(String);
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FileNode FileNode;
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FileNode ParentNode;
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Int32 Result;
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FileNode = FileNodeMap.Get(FileName);
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if (null != FileNode)
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return STATUS_OBJECT_NAME_COLLISION;
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ParentNode = FileNodeMap.GetParent(FileName, out Result);
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if (null == ParentNode)
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return Result;
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if (0 != (CreateOptions & FILE_DIRECTORY_FILE))
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AllocationSize = 0;
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if (FileNodeMap.Count() >= MaxFileNodes)
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return STATUS_CANNOT_MAKE;
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if (AllocationSize > MaxFileSize)
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return STATUS_DISK_FULL;
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FileName = Path.Combine(ParentNode.FileName, Path.GetFileName(FileName));
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/* normalize name */
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FileNode = new FileNode(FileName);
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FileNode.MainFileNode = FileNodeMap.GetMain(FileName);
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FileNode.FileInfo.FileAttributes = 0 != (FileAttributes & (UInt32)System.IO.FileAttributes.Directory) ?
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FileAttributes : FileAttributes | (UInt32)System.IO.FileAttributes.Archive;
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FileNode.FileSecurity = SecurityDescriptor;
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FileNode.FileInfo.AllocationSize = AllocationSize;
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if (0 != AllocationSize)
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{
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Result = SetFileSizeInternal(FileNode, AllocationSize, true);
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if (0 > Result)
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return Result;
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}
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FileNodeMap.Insert(FileNode);
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InsertOpenNode(FileNode);
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FileNode0 = FileNode;
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FileInfo = FileNode.GetFileInfo();
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NormalizedName = FileNode.FileName;
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return STATUS_SUCCESS;
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}
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public override Int32 Open(
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String FileName,
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UInt32 CreateOptions,
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UInt32 GrantedAccess,
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out Object FileNode0,
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out Object FileDesc,
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out FileInfo FileInfo,
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out String NormalizedName)
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{
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FileNode0 = default(Object);
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FileDesc = default(Object);
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FileInfo = default(FileInfo);
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NormalizedName = default(String);
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FileNode FileNode;
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Int32 Result;
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FileNode = FileNodeMap.Get(FileName);
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if (null == FileNode)
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{
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Result = STATUS_OBJECT_NAME_NOT_FOUND;
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FileNodeMap.GetParent(FileName, out Result);
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return Result;
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}
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InsertOpenNode(FileNode);
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FileNode0 = FileNode;
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FileInfo = FileNode.GetFileInfo();
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NormalizedName = FileNode.FileName;
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return STATUS_SUCCESS;
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}
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public override Int32 Overwrite(
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Object FileNode0,
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Object FileDesc,
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UInt32 FileAttributes,
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Boolean ReplaceFileAttributes,
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UInt64 AllocationSize,
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out FileInfo FileInfo)
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{
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FileInfo = default(FileInfo);
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FileNode FileNode = (FileNode)FileNode0;
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Int32 Result;
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List<String> StreamFileNames = new List<String>(FileNodeMap.GetStreamFileNames(FileNode));
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lock (OpenNodeSet)
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{
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foreach (String StreamFileName in StreamFileNames)
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{
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FileNode StreamNode = FileNodeMap.Get(StreamFileName);
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if (null == StreamNode)
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continue; /* should not happen */
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if (!OpenNodeSet.Contains(StreamNode))
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FileNodeMap.Remove(StreamNode);
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}
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}
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Result = SetFileSizeInternal(FileNode, AllocationSize, true);
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if (0 > Result)
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return Result;
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if (ReplaceFileAttributes)
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FileNode.FileInfo.FileAttributes = FileAttributes | (UInt32)System.IO.FileAttributes.Archive;
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else
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FileNode.FileInfo.FileAttributes |= FileAttributes | (UInt32)System.IO.FileAttributes.Archive;
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FileNode.FileInfo.FileSize = 0;
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FileNode.FileInfo.LastAccessTime =
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FileNode.FileInfo.LastWriteTime =
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FileNode.FileInfo.ChangeTime = (UInt64)DateTime.Now.ToFileTimeUtc();
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FileInfo = FileNode.GetFileInfo();
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return STATUS_SUCCESS;
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}
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public override void Cleanup(
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Object FileNode0,
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Object FileDesc,
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String FileName,
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UInt32 Flags)
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{
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FileNode FileNode = (FileNode)FileNode0;
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FileNode MainFileNode = null != FileNode.MainFileNode ?
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FileNode.MainFileNode : FileNode;
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if (0 != (Flags & CleanupSetArchiveBit))
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{
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if (0 == (MainFileNode.FileInfo.FileAttributes & (UInt32)FileAttributes.Directory))
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MainFileNode.FileInfo.FileAttributes |= (UInt32)FileAttributes.Archive;
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}
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if (0 != (Flags & (CleanupSetLastAccessTime | CleanupSetLastWriteTime | CleanupSetChangeTime)))
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{
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UInt64 SystemTime = (UInt64)DateTime.Now.ToFileTimeUtc();
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if (0 != (Flags & CleanupSetLastAccessTime))
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MainFileNode.FileInfo.LastAccessTime = SystemTime;
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if (0 != (Flags & CleanupSetLastWriteTime))
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MainFileNode.FileInfo.LastWriteTime = SystemTime;
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if (0 != (Flags & CleanupSetChangeTime))
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MainFileNode.FileInfo.ChangeTime = SystemTime;
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}
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if (0 != (Flags & CleanupSetAllocationSize))
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{
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UInt64 AllocationUnit = MEMFS_SECTOR_SIZE * MEMFS_SECTORS_PER_ALLOCATION_UNIT;
|
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UInt64 AllocationSize = (FileNode.FileInfo.FileSize + AllocationUnit - 1) /
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AllocationUnit * AllocationUnit;
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SetFileSizeInternal(FileNode, AllocationSize, true);
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}
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if (0 != (Flags & CleanupDelete) && !FileNodeMap.HasChild(FileNode))
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{
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List<String> StreamFileNames = new List<String>(FileNodeMap.GetStreamFileNames(FileNode));
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foreach (String StreamFileName in StreamFileNames)
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{
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FileNode StreamNode = FileNodeMap.Get(StreamFileName);
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if (null == StreamNode)
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continue; /* should not happen */
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FileNodeMap.Remove(StreamNode);
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}
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FileNodeMap.Remove(FileNode);
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}
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}
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|
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public override void Close(
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Object FileNode0,
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Object FileDesc)
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{
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FileNode FileNode = (FileNode)FileNode0;
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RemoveOpenNode(FileNode);
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}
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public override Int32 Read(
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Object FileNode0,
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Object FileDesc,
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IntPtr Buffer,
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UInt64 Offset,
|
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UInt32 Length,
|
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out UInt32 BytesTransferred)
|
|
{
|
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FileNode FileNode = (FileNode)FileNode0;
|
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UInt64 EndOffset;
|
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|
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if (Offset >= FileNode.FileInfo.FileSize)
|
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{
|
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BytesTransferred = default(UInt32);
|
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return STATUS_END_OF_FILE;
|
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}
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EndOffset = Offset + Length;
|
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if (EndOffset > FileNode.FileInfo.FileSize)
|
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EndOffset = FileNode.FileInfo.FileSize;
|
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|
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BytesTransferred = (UInt32)(EndOffset - Offset);
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Marshal.Copy(FileNode.FileData, 0, Buffer, (int)BytesTransferred);
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return STATUS_SUCCESS;
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|
}
|
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|
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public override Int32 Write(
|
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Object FileNode0,
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Object FileDesc,
|
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IntPtr Buffer,
|
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UInt64 Offset,
|
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UInt32 Length,
|
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Boolean WriteToEndOfFile,
|
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Boolean ConstrainedIo,
|
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out UInt32 BytesTransferred,
|
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out FileInfo FileInfo)
|
|
{
|
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FileNode FileNode = (FileNode)FileNode0;
|
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UInt64 EndOffset;
|
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|
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if (ConstrainedIo)
|
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{
|
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if (Offset >= FileNode.FileInfo.FileSize)
|
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{
|
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BytesTransferred = default(UInt32);
|
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FileInfo = default(FileInfo);
|
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return STATUS_SUCCESS;
|
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}
|
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EndOffset = Offset + Length;
|
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if (EndOffset > FileNode.FileInfo.FileSize)
|
|
EndOffset = FileNode.FileInfo.FileSize;
|
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}
|
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else
|
|
{
|
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if (WriteToEndOfFile)
|
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Offset = FileNode.FileInfo.FileSize;
|
|
EndOffset = Offset + Length;
|
|
if (EndOffset > FileNode.FileInfo.FileSize)
|
|
{
|
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Int32 Result = SetFileSizeInternal(FileNode, EndOffset, false);
|
|
if (0 > Result)
|
|
{
|
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BytesTransferred = default(UInt32);
|
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FileInfo = default(FileInfo);
|
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return Result;
|
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}
|
|
}
|
|
}
|
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|
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BytesTransferred = (UInt32)(EndOffset - Offset);
|
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Marshal.Copy(Buffer, FileNode.FileData, 0, (int)BytesTransferred);
|
|
|
|
FileInfo = FileNode.GetFileInfo();
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 Flush(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
out FileInfo FileInfo)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
/* nothing to flush, since we do not cache anything */
|
|
FileInfo = null != FileNode ? FileNode.GetFileInfo() : default(FileInfo);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 GetFileInfo(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
out FileInfo FileInfo)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
FileInfo = FileNode.GetFileInfo();
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 SetBasicInfo(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
UInt32 FileAttributes,
|
|
UInt64 CreationTime,
|
|
UInt64 LastAccessTime,
|
|
UInt64 LastWriteTime,
|
|
UInt64 ChangeTime,
|
|
out FileInfo FileInfo)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
if (null != FileNode.MainFileNode)
|
|
FileNode = FileNode.MainFileNode;
|
|
|
|
if (unchecked((UInt32)(-1)) != FileAttributes)
|
|
FileNode.FileInfo.FileAttributes = FileAttributes;
|
|
if (0 != CreationTime)
|
|
FileNode.FileInfo.CreationTime = CreationTime;
|
|
if (0 != LastAccessTime)
|
|
FileNode.FileInfo.LastAccessTime = LastAccessTime;
|
|
if (0 != LastWriteTime)
|
|
FileNode.FileInfo.LastWriteTime = LastWriteTime;
|
|
if (0 != ChangeTime)
|
|
FileNode.FileInfo.ChangeTime = ChangeTime;
|
|
|
|
FileInfo = FileNode.GetFileInfo();
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 SetFileSize(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
UInt64 NewSize,
|
|
Boolean SetAllocationSize,
|
|
out FileInfo FileInfo)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
Int32 Result;
|
|
|
|
Result = SetFileSizeInternal(FileNode, NewSize, SetAllocationSize);
|
|
FileInfo = 0 <= Result ? FileNode.GetFileInfo() : default(FileInfo);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
private Int32 SetFileSizeInternal(
|
|
FileNode FileNode,
|
|
UInt64 NewSize,
|
|
Boolean SetAllocationSize)
|
|
{
|
|
if (SetAllocationSize)
|
|
{
|
|
if (FileNode.FileInfo.AllocationSize != NewSize)
|
|
{
|
|
if (NewSize > MaxFileSize)
|
|
return STATUS_DISK_FULL;
|
|
|
|
byte[] FileData = null;
|
|
if (0 != NewSize)
|
|
try
|
|
{
|
|
FileData = new byte[NewSize];
|
|
}
|
|
catch
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
Array.Copy(FileNode.FileData, FileData,
|
|
(int)Math.Min(FileNode.FileInfo.AllocationSize, NewSize));
|
|
|
|
FileNode.FileData = FileData;
|
|
FileNode.FileInfo.AllocationSize = NewSize;
|
|
if (FileNode.FileInfo.FileSize > NewSize)
|
|
FileNode.FileInfo.FileSize = NewSize;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (FileNode.FileInfo.FileSize != NewSize)
|
|
{
|
|
if (FileNode.FileInfo.AllocationSize < NewSize)
|
|
{
|
|
UInt64 AllocationUnit = MEMFS_SECTOR_SIZE * MEMFS_SECTORS_PER_ALLOCATION_UNIT;
|
|
UInt64 AllocationSize = (NewSize + AllocationUnit - 1) / AllocationUnit * AllocationUnit;
|
|
Int32 Result = SetFileSizeInternal(FileNode, AllocationSize, true);
|
|
if (0 > Result)
|
|
return Result;
|
|
}
|
|
|
|
if (FileNode.FileInfo.FileSize < NewSize)
|
|
Array.Clear(FileNode.FileData,
|
|
(int)FileNode.FileInfo.FileSize, (int)(NewSize - FileNode.FileInfo.FileSize));
|
|
FileNode.FileInfo.FileSize = NewSize;
|
|
}
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 CanDelete(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
String FileName)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
if (FileNodeMap.HasChild(FileNode))
|
|
return STATUS_DIRECTORY_NOT_EMPTY;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 Rename(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
String FileName,
|
|
String NewFileName,
|
|
Boolean ReplaceIfExists)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
FileNode NewFileNode;
|
|
|
|
NewFileNode = FileNodeMap.Get(NewFileName);
|
|
if (null != NewFileNode && FileNode != NewFileNode)
|
|
{
|
|
if (!ReplaceIfExists)
|
|
return STATUS_OBJECT_NAME_COLLISION;
|
|
if (0 != (NewFileNode.FileInfo.FileAttributes & (UInt32)FileAttributes.Directory))
|
|
return STATUS_ACCESS_DENIED;
|
|
}
|
|
if (null != NewFileNode)
|
|
FileNodeMap.Remove(NewFileNode);
|
|
|
|
List<String> DescendantFileNames = new List<String>(FileNodeMap.GetDescendantFileNames(FileNode));
|
|
foreach (String DescendantFileName in DescendantFileNames)
|
|
{
|
|
FileNode DescendantFileNode = FileNodeMap.Get(DescendantFileName);
|
|
if (null == DescendantFileNode)
|
|
continue; /* should not happen */
|
|
FileNodeMap.Remove(DescendantFileNode);
|
|
DescendantFileNode.FileName =
|
|
NewFileName + DescendantFileNode.FileName.Substring(FileName.Length);
|
|
FileNodeMap.Insert(DescendantFileNode);
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 GetSecurity(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
ref Byte[] SecurityDescriptor)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
if (null != FileNode.MainFileNode)
|
|
FileNode = FileNode.MainFileNode;
|
|
|
|
SecurityDescriptor = FileNode.FileSecurity;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 SetSecurity(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
AccessControlSections Sections,
|
|
Byte[] SecurityDescriptor)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
if (null != FileNode.MainFileNode)
|
|
FileNode = FileNode.MainFileNode;
|
|
|
|
ObjectSecurity ObjectSecurity =
|
|
0 != (FileNode.FileInfo.FileAttributes & (UInt32)FileAttributes.Directory) ?
|
|
(ObjectSecurity)new DirectorySecurity() : (ObjectSecurity)new FileSecurity();
|
|
ObjectSecurity.SetSecurityDescriptorBinaryForm(FileNode.FileSecurity);
|
|
ObjectSecurity.SetSecurityDescriptorBinaryForm(SecurityDescriptor, Sections);
|
|
FileNode.FileSecurity = ObjectSecurity.GetSecurityDescriptorBinaryForm();
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Boolean ReadDirectoryEntry(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
String Pattern,
|
|
String Marker,
|
|
ref Object Context,
|
|
out String FileName,
|
|
out FileInfo FileInfo)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
IEnumerator<String> Enumerator = (IEnumerator<String>)Context;
|
|
|
|
if (null == Enumerator)
|
|
{
|
|
List<String> ChildrenFileNames = new List<String>();
|
|
if ("\\" != FileNode.FileName)
|
|
{
|
|
/* if this is not the root directory add the dot entries */
|
|
ChildrenFileNames.Add(".");
|
|
ChildrenFileNames.Add("..");
|
|
}
|
|
ChildrenFileNames.AddRange(FileNodeMap.GetChildrenFileNames(FileNode));
|
|
Context = Enumerator = ChildrenFileNames.GetEnumerator();
|
|
}
|
|
|
|
while (Enumerator.MoveNext())
|
|
{
|
|
FileName = Enumerator.Current;
|
|
if ("." == FileName)
|
|
{
|
|
FileInfo = FileNode.GetFileInfo();
|
|
return true;
|
|
}
|
|
else if (".." == FileName)
|
|
{
|
|
Int32 Result;
|
|
FileNode ParentNode = FileNodeMap.GetParent(FileNode.FileName, out Result);
|
|
if (null != ParentNode)
|
|
{
|
|
FileInfo = ParentNode.GetFileInfo();
|
|
return true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
FileNode ChildFileNode = FileNodeMap.Get(FileName);
|
|
if (null != ChildFileNode)
|
|
{
|
|
FileInfo = ChildFileNode.GetFileInfo();
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
FileName = default(String);
|
|
FileInfo = default(FileInfo);
|
|
return false;
|
|
}
|
|
|
|
public override Int32 GetReparsePointByName(
|
|
String FileName,
|
|
Boolean IsDirectory,
|
|
ref Byte[] ReparsePoint)
|
|
{
|
|
FileNode FileNode;
|
|
|
|
FileNode = FileNodeMap.Get(FileName);
|
|
if (null == FileNode)
|
|
return STATUS_OBJECT_NAME_NOT_FOUND;
|
|
|
|
if (0 == (FileNode.FileInfo.FileAttributes & (UInt32)FileAttributes.ReparsePoint))
|
|
return STATUS_NOT_A_REPARSE_POINT;
|
|
|
|
ReparsePoint = FileNode.ReparseData;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 GetReparsePoint(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
String FileName,
|
|
ref Byte[] ReparsePoint)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
if (null != FileNode.MainFileNode)
|
|
FileNode = FileNode.MainFileNode;
|
|
|
|
if (0 == (FileNode.FileInfo.FileAttributes & (UInt32)FileAttributes.ReparsePoint))
|
|
return STATUS_NOT_A_REPARSE_POINT;
|
|
|
|
ReparsePoint = FileNode.ReparseData;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 SetReparsePoint(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
String FileName,
|
|
Byte[] ReparsePoint)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
if (null != FileNode.MainFileNode)
|
|
FileNode = FileNode.MainFileNode;
|
|
|
|
if (FileNodeMap.HasChild(FileNode))
|
|
return STATUS_DIRECTORY_NOT_EMPTY;
|
|
|
|
if (null != FileNode.ReparseData)
|
|
{
|
|
Int32 Result = CanReplaceReparsePoint(FileNode.ReparseData, ReparsePoint);
|
|
if (0 > Result)
|
|
return Result;
|
|
}
|
|
|
|
FileNode.FileInfo.FileAttributes |= (UInt32)FileAttributes.ReparsePoint;
|
|
FileNode.FileInfo.ReparseTag = GetReparseTag(ReparsePoint);
|
|
FileNode.ReparseData = ReparsePoint;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 DeleteReparsePoint(
|
|
Object FileNode0,
|
|
Object FileDesc,
|
|
String FileName,
|
|
Byte[] ReparsePoint)
|
|
{
|
|
FileNode FileNode = (FileNode)FileNode0;
|
|
|
|
if (null != FileNode.MainFileNode)
|
|
FileNode = FileNode.MainFileNode;
|
|
|
|
if (null != FileNode.ReparseData)
|
|
{
|
|
Int32 Result = CanReplaceReparsePoint(FileNode.ReparseData, ReparsePoint);
|
|
if (0 > Result)
|
|
return Result;
|
|
}
|
|
else
|
|
return STATUS_NOT_A_REPARSE_POINT;
|
|
|
|
FileNode.FileInfo.FileAttributes &= ~(UInt32)FileAttributes.ReparsePoint;
|
|
FileNode.FileInfo.ReparseTag = GetReparseTag(ReparsePoint);
|
|
FileNode.ReparseData = null;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
public override Int32 GetStreamInfo(
|
|
Object FileNode,
|
|
Object FileDesc,
|
|
IntPtr Buffer,
|
|
UInt32 Length,
|
|
out UInt32 BytesTransferred)
|
|
{
|
|
BytesTransferred = default(UInt32);
|
|
return STATUS_INVALID_DEVICE_REQUEST;
|
|
}
|
|
|
|
private void InsertOpenNode(FileNode FileNode)
|
|
{
|
|
lock (OpenNodeSet)
|
|
{
|
|
if (1 == ++FileNode.OpenCount)
|
|
OpenNodeSet.Add(FileNode);
|
|
}
|
|
}
|
|
private void RemoveOpenNode(FileNode FileNode)
|
|
{
|
|
lock (OpenNodeSet)
|
|
{
|
|
if (0 == --FileNode.OpenCount)
|
|
OpenNodeSet.Remove(FileNode);
|
|
}
|
|
}
|
|
|
|
private FileNodeMap FileNodeMap;
|
|
private HashSet<FileNode> OpenNodeSet;
|
|
private UInt32 MaxFileNodes;
|
|
private UInt32 MaxFileSize;
|
|
private String VolumeLabel;
|
|
}
|
|
|
|
class MemfsService : Service
|
|
{
|
|
private class CommandLineUsageException : Exception
|
|
{
|
|
public CommandLineUsageException(String Message = null) : base(Message)
|
|
{
|
|
HasMessage = null != Message;
|
|
}
|
|
|
|
public bool HasMessage;
|
|
}
|
|
|
|
private const String PROGNAME = "memfs-dotnet";
|
|
|
|
public MemfsService() : base("MemfsService")
|
|
{
|
|
}
|
|
protected override void OnStart(String[] Args)
|
|
{
|
|
try
|
|
{
|
|
Boolean CaseInsensitive = false;
|
|
String DebugLogFile = null;
|
|
UInt32 DebugFlags = 0;
|
|
UInt32 FileInfoTimeout = unchecked((UInt32)(-1));
|
|
UInt32 MaxFileNodes = 1024;
|
|
UInt32 MaxFileSize = 16 * 1024 * 1024;
|
|
String FileSystemName = null;
|
|
String VolumePrefix = null;
|
|
String MountPoint = null;
|
|
String RootSddl = null;
|
|
FileSystemHost Host = null;
|
|
Memfs Memfs = null;
|
|
int I;
|
|
|
|
for (I = 1; Args.Length > I; I++)
|
|
{
|
|
String Arg = Args[I];
|
|
if ('-' != Arg[0])
|
|
break;
|
|
switch (Arg[1])
|
|
{
|
|
case '?':
|
|
throw new CommandLineUsageException();
|
|
case 'D':
|
|
argtos(Args, ref I, ref DebugLogFile);
|
|
break;
|
|
case 'd':
|
|
argtol(Args, ref I, ref DebugFlags);
|
|
break;
|
|
case 'F':
|
|
argtos(Args, ref I, ref FileSystemName);
|
|
break;
|
|
case 'i':
|
|
CaseInsensitive = true;
|
|
break;
|
|
case 'm':
|
|
argtos(Args, ref I, ref MountPoint);
|
|
break;
|
|
case 'n':
|
|
argtol(Args, ref I, ref MaxFileNodes);
|
|
break;
|
|
case 'S':
|
|
argtos(Args, ref I, ref RootSddl);
|
|
break;
|
|
case 's':
|
|
argtol(Args, ref I, ref MaxFileSize);
|
|
break;
|
|
case 't':
|
|
argtol(Args, ref I, ref FileInfoTimeout);
|
|
break;
|
|
case 'u':
|
|
argtos(Args, ref I, ref VolumePrefix);
|
|
break;
|
|
default:
|
|
throw new CommandLineUsageException();
|
|
}
|
|
}
|
|
|
|
if (Args.Length > I)
|
|
throw new CommandLineUsageException();
|
|
|
|
if ((null == VolumePrefix || 0 == VolumePrefix.Length) && null == MountPoint)
|
|
throw new CommandLineUsageException();
|
|
|
|
if (null != DebugLogFile)
|
|
if (0 > FileSystemHost.SetDebugLogFile(DebugLogFile))
|
|
throw new CommandLineUsageException("cannot open debug log file");
|
|
|
|
Host = new FileSystemHost(Memfs = new Memfs(
|
|
CaseInsensitive, MaxFileNodes, MaxFileSize, RootSddl));
|
|
Host.FileInfoTimeout = FileInfoTimeout;
|
|
Host.Prefix = VolumePrefix;
|
|
Host.FileSystemName = null != FileSystemName ? FileSystemName : "-MEMFS";
|
|
if (0 > Host.Mount(MountPoint, null, false, DebugFlags))
|
|
throw new IOException("cannot mount file system");
|
|
MountPoint = Host.MountPoint();
|
|
_Host = Host;
|
|
|
|
Log(EVENTLOG_INFORMATION_TYPE, String.Format("{0} -t {1} -n {2} -s {3} {4}{5}{6}{7}{8}{9}",
|
|
PROGNAME, FileInfoTimeout, MaxFileNodes, MaxFileSize,
|
|
null != RootSddl ? " -S " : "", null != RootSddl ? RootSddl : "",
|
|
null != VolumePrefix && 0 < VolumePrefix.Length ? " -u " : "",
|
|
null != VolumePrefix && 0 < VolumePrefix.Length ? VolumePrefix : "",
|
|
null != MountPoint ? " -m " : "", null != MountPoint ? MountPoint : ""));
|
|
}
|
|
catch (CommandLineUsageException ex)
|
|
{
|
|
Log(EVENTLOG_ERROR_TYPE, String.Format(
|
|
"{0}" +
|
|
"usage: {1} OPTIONS\n" +
|
|
"\n" +
|
|
"options:\n" +
|
|
" -d DebugFlags [-1: enable all debug logs]\n" +
|
|
" -D DebugLogFile [file path; use - for stderr]\n" +
|
|
" -i [case insensitive file system]\n" +
|
|
" -t FileInfoTimeout [millis]\n" +
|
|
" -n MaxFileNodes\n" +
|
|
" -s MaxFileSize [bytes]\n" +
|
|
" -F FileSystemName\n" +
|
|
" -S RootSddl [file rights: FA, etc; NO generic rights: GA, etc.]\n" +
|
|
" -u \\Server\\Share [UNC prefix (single backslash)]\n" +
|
|
" -m MountPoint [X:|*|directory]\n",
|
|
ex.HasMessage ? ex.Message + "\n" : "",
|
|
PROGNAME));
|
|
throw;
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
Log(EVENTLOG_ERROR_TYPE, String.Format("{0}", ex.Message));
|
|
throw;
|
|
}
|
|
}
|
|
protected override void OnStop()
|
|
{
|
|
_Host.Unmount();
|
|
_Host = null;
|
|
}
|
|
|
|
private static void argtos(String[] Args, ref int I, ref String V)
|
|
{
|
|
if (Args.Length > ++I)
|
|
V = Args[I];
|
|
else
|
|
throw new CommandLineUsageException();
|
|
}
|
|
private static void argtol(String[] Args, ref int I, ref UInt32 V)
|
|
{
|
|
Int32 R;
|
|
if (Args.Length > ++I)
|
|
V = Int32.TryParse(Args[I], out R) ? (UInt32)R : V;
|
|
else
|
|
throw new CommandLineUsageException();
|
|
}
|
|
|
|
private FileSystemHost _Host;
|
|
}
|
|
|
|
class Program
|
|
{
|
|
static void Main(string[] args)
|
|
{
|
|
Environment.ExitCode = new MemfsService().Run();
|
|
}
|
|
}
|
|
}
|
|
|
|
#if false
|
|
using System.Collections;
|
|
using System.IO;
|
|
using System.Runtime.InteropServices;
|
|
using System.Security.AccessControl;
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namespace memfs
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{
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class Memfs : FileSystemBase
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{
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protected const int ALLOCATION_UNIT = 4096;
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protected static void ThrowIoExceptionWithHResult(Int32 HResult)
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{
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throw new IOException(null, HResult);
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}
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protected static void ThrowIoExceptionWithWin32(Int32 Error)
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{
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ThrowIoExceptionWithHResult(unchecked((Int32)(0x80070000 | Error)));
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}
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protected static void ThrowIoExceptionWithNtStatus(Int32 Status)
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{
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ThrowIoExceptionWithWin32((Int32)Win32FromNtStatus(Status));
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}
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protected class FileDesc
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{
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public FileStream Stream;
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public DirectoryInfo DirInfo;
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public DictionaryEntry[] FileSystemInfos;
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public FileDesc(FileStream Stream)
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{
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this.Stream = Stream;
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}
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public FileDesc(DirectoryInfo DirInfo)
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{
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this.DirInfo = DirInfo;
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}
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public static void GetFileInfoFromFileSystemInfo(
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FileSystemInfo Info,
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out FileInfo FileInfo)
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{
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FileInfo.FileAttributes = (UInt32)Info.Attributes;
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FileInfo.ReparseTag = 0;
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FileInfo.FileSize = Info is System.IO.FileInfo ?
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(UInt64)((System.IO.FileInfo)Info).Length : 0;
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FileInfo.AllocationSize = (FileInfo.FileSize + ALLOCATION_UNIT - 1)
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/ ALLOCATION_UNIT * ALLOCATION_UNIT;
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FileInfo.CreationTime = (UInt64)Info.CreationTimeUtc.ToFileTimeUtc();
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FileInfo.LastAccessTime = (UInt64)Info.LastAccessTimeUtc.ToFileTimeUtc();
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FileInfo.LastWriteTime = (UInt64)Info.LastWriteTimeUtc.ToFileTimeUtc();
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FileInfo.ChangeTime = FileInfo.LastWriteTime;
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FileInfo.IndexNumber = 0;
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FileInfo.HardLinks = 0;
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}
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public Int32 GetFileInfo(out FileInfo FileInfo)
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{
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if (null != Stream)
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{
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BY_HANDLE_FILE_INFORMATION Info;
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if (!GetFileInformationByHandle(Stream.SafeFileHandle.DangerousGetHandle(),
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out Info))
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ThrowIoExceptionWithWin32(Marshal.GetLastWin32Error());
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FileInfo.FileAttributes = Info.dwFileAttributes;
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FileInfo.ReparseTag = 0;
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FileInfo.FileSize = (UInt64)Stream.Length;
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FileInfo.AllocationSize = (FileInfo.FileSize + ALLOCATION_UNIT - 1)
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/ ALLOCATION_UNIT * ALLOCATION_UNIT;
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FileInfo.CreationTime = Info.ftCreationTime;
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FileInfo.LastAccessTime = Info.ftLastAccessTime;
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FileInfo.LastWriteTime = Info.ftLastWriteTime;
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FileInfo.ChangeTime = FileInfo.LastWriteTime;
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FileInfo.IndexNumber = 0;
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FileInfo.HardLinks = 0;
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}
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else
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GetFileInfoFromFileSystemInfo(DirInfo, out FileInfo);
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return STATUS_SUCCESS;
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}
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public void SetBasicInfo(
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UInt32 FileAttributes,
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UInt64 CreationTime,
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UInt64 LastAccessTime,
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UInt64 LastWriteTime)
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{
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if (0 == FileAttributes)
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FileAttributes = (UInt32)System.IO.FileAttributes.Normal;
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if (null != Stream)
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{
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FILE_BASIC_INFO Info = default(FILE_BASIC_INFO);
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if (unchecked((UInt32)(-1)) != FileAttributes)
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Info.FileAttributes = FileAttributes;
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if (0 != CreationTime)
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Info.CreationTime = CreationTime;
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if (0 != LastAccessTime)
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Info.LastAccessTime = LastAccessTime;
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if (0 != LastWriteTime)
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Info.LastWriteTime = LastWriteTime;
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if (!SetFileInformationByHandle(Stream.SafeFileHandle.DangerousGetHandle(),
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0/*FileBasicInfo*/, ref Info, (UInt32)Marshal.SizeOf(Info)))
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ThrowIoExceptionWithWin32(Marshal.GetLastWin32Error());
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}
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else
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{
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if (unchecked((UInt32)(-1)) != FileAttributes)
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DirInfo.Attributes = (System.IO.FileAttributes)FileAttributes;
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if (0 != CreationTime)
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DirInfo.CreationTimeUtc = DateTime.FromFileTimeUtc((Int64)CreationTime);
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if (0 != LastAccessTime)
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DirInfo.LastAccessTimeUtc = DateTime.FromFileTimeUtc((Int64)LastAccessTime);
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if (0 != LastWriteTime)
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DirInfo.LastWriteTimeUtc = DateTime.FromFileTimeUtc((Int64)LastWriteTime);
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}
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}
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public UInt32 GetFileAttributes()
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{
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FileInfo FileInfo;
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GetFileInfo(out FileInfo);
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return FileInfo.FileAttributes;
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}
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public void SetFileAttributes(UInt32 FileAttributes)
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{
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SetBasicInfo(FileAttributes, 0, 0, 0);
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}
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public Byte[] GetSecurityDescriptor()
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{
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if (null != Stream)
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return Stream.GetAccessControl().GetSecurityDescriptorBinaryForm();
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else
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return DirInfo.GetAccessControl().GetSecurityDescriptorBinaryForm();
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}
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public void SetSecurityDescriptor(AccessControlSections Sections, Byte[] SecurityDescriptor)
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{
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Int32 SecurityInformation = 0;
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if (0 != (Sections & AccessControlSections.Owner))
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SecurityInformation |= 1/*OWNER_SECURITY_INFORMATION*/;
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if (0 != (Sections & AccessControlSections.Group))
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SecurityInformation |= 2/*GROUP_SECURITY_INFORMATION*/;
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if (0 != (Sections & AccessControlSections.Access))
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SecurityInformation |= 4/*DACL_SECURITY_INFORMATION*/;
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if (0 != (Sections & AccessControlSections.Audit))
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SecurityInformation |= 8/*SACL_SECURITY_INFORMATION*/;
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if (null != Stream)
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{
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if (!SetKernelObjectSecurity(Stream.SafeFileHandle.DangerousGetHandle(),
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SecurityInformation, SecurityDescriptor))
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ThrowIoExceptionWithWin32(Marshal.GetLastWin32Error());
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}
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else
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{
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if (!SetFileSecurityW(DirInfo.FullName,
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SecurityInformation, SecurityDescriptor))
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ThrowIoExceptionWithWin32(Marshal.GetLastWin32Error());
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}
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}
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public void SetDisposition(Boolean Safe)
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{
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if (null != Stream)
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{
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FILE_DISPOSITION_INFO Info;
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Info.DeleteFile = true;
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if (!SetFileInformationByHandle(Stream.SafeFileHandle.DangerousGetHandle(),
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4/*FileDispositionInfo*/, ref Info, (UInt32)Marshal.SizeOf(Info)))
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if (!Safe)
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ThrowIoExceptionWithWin32(Marshal.GetLastWin32Error());
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}
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else
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try
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{
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DirInfo.Delete();
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}
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catch (Exception ex)
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{
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if (!Safe)
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ThrowIoExceptionWithHResult(ex.HResult);
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}
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}
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public static void Rename(String FileName, String NewFileName, Boolean ReplaceIfExists)
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{
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if (!MoveFileExW(FileName, NewFileName, ReplaceIfExists ? 1U/*MOVEFILE_REPLACE_EXISTING*/ : 0))
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ThrowIoExceptionWithWin32(Marshal.GetLastWin32Error());
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}
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/* interop */
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[StructLayout(LayoutKind.Sequential, Pack = 4)]
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private struct BY_HANDLE_FILE_INFORMATION
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{
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public UInt32 dwFileAttributes;
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public UInt64 ftCreationTime;
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public UInt64 ftLastAccessTime;
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public UInt64 ftLastWriteTime;
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public UInt32 dwVolumeSerialNumber;
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public UInt32 nFileSizeHigh;
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public UInt32 nFileSizeLow;
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public UInt32 nNumberOfLinks;
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public UInt32 nFileIndexHigh;
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public UInt32 nFileIndexLow;
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}
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[StructLayout(LayoutKind.Sequential)]
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private struct FILE_BASIC_INFO
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{
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public UInt64 CreationTime;
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public UInt64 LastAccessTime;
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public UInt64 LastWriteTime;
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public UInt64 ChangeTime;
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public UInt32 FileAttributes;
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}
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[StructLayout(LayoutKind.Sequential)]
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private struct FILE_DISPOSITION_INFO
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{
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public Boolean DeleteFile;
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}
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[DllImport("kernel32.dll", SetLastError = true)]
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private static extern Boolean GetFileInformationByHandle(
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IntPtr hFile,
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out BY_HANDLE_FILE_INFORMATION lpFileInformation);
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[DllImport("kernel32.dll", SetLastError = true)]
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private static extern Boolean SetFileInformationByHandle(
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IntPtr hFile,
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Int32 FileInformationClass,
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ref FILE_BASIC_INFO lpFileInformation,
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UInt32 dwBufferSize);
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[DllImport("kernel32.dll", SetLastError = true)]
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private static extern Boolean SetFileInformationByHandle(
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IntPtr hFile,
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Int32 FileInformationClass,
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ref FILE_DISPOSITION_INFO lpFileInformation,
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UInt32 dwBufferSize);
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[DllImport("kernel32.dll", SetLastError = true)]
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private static extern Boolean MoveFileExW(
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[MarshalAs(UnmanagedType.LPWStr)] String lpExistingFileName,
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[MarshalAs(UnmanagedType.LPWStr)] String lpNewFileName,
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UInt32 dwFlags);
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[DllImport("advapi32.dll", SetLastError = true)]
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private static extern Boolean SetFileSecurityW(
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[MarshalAs(UnmanagedType.LPWStr)] String FileName,
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Int32 SecurityInformation,
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Byte[] SecurityDescriptor);
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[DllImport("advapi32.dll", SetLastError = true)]
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private static extern Boolean SetKernelObjectSecurity(
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IntPtr Handle,
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Int32 SecurityInformation,
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Byte[] SecurityDescriptor);
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}
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private class DirectoryEntryComparer : IComparer
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{
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public int Compare(object x, object y)
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{
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return String.Compare(
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(String)((DictionaryEntry)x).Key,
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(String)((DictionaryEntry)y).Key);
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}
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}
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private static DirectoryEntryComparer _DirectoryEntryComparer =
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new DirectoryEntryComparer();
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public Memfs(String Path0)
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{
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_Path = Path.GetFullPath(Path0);
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if (_Path.EndsWith("\\"))
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_Path = _Path.Substring(0, _Path.Length - 1);
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}
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public String ConcatPath(String FileName)
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{
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return _Path + FileName;
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}
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public override Int32 ExceptionHandler(Exception ex)
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{
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Int32 HResult = ex.HResult; /* needs Framework 4.5 */
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if (0x80070000 == (HResult & 0xFFFF0000))
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return NtStatusFromWin32((UInt32)HResult & 0xFFFF);
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return STATUS_UNEXPECTED_IO_ERROR;
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}
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public override Int32 GetSecurityByName(
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String FileName,
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out UInt32 FileAttributes/* or ReparsePointIndex */,
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ref Byte[] SecurityDescriptor)
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{
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FileName = ConcatPath(FileName);
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System.IO.FileInfo Info = new System.IO.FileInfo(FileName);
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FileAttributes = (UInt32)Info.Attributes;
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if (null != SecurityDescriptor)
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SecurityDescriptor = Info.GetAccessControl().GetSecurityDescriptorBinaryForm();
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return STATUS_SUCCESS;
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}
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public override Int32 Create(
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String FileName,
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UInt32 CreateOptions,
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UInt32 GrantedAccess,
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UInt32 FileAttributes,
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Byte[] SecurityDescriptor,
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UInt64 AllocationSize,
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out Object FileNode,
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out Object FileDesc0,
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out FileInfo FileInfo,
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out String NormalizedName)
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{
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FileDesc FileDesc = null;
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try
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{
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FileName = ConcatPath(FileName);
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if (0 == (CreateOptions & FILE_DIRECTORY_FILE))
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{
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FileSecurity Security = null;
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if (null != SecurityDescriptor)
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{
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Security = new FileSecurity();
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Security.SetSecurityDescriptorBinaryForm(SecurityDescriptor);
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}
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FileDesc = new FileDesc(
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new FileStream(
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FileName,
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FileMode.CreateNew,
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(FileSystemRights)GrantedAccess | FileSystemRights.WriteAttributes,
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FileShare.Read | FileShare.Write | FileShare.Delete,
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4096,
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0,
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Security));
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}
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else
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{
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if (Directory.Exists(FileName))
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ThrowIoExceptionWithNtStatus(STATUS_OBJECT_NAME_COLLISION);
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DirectorySecurity Security = null;
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if (null != SecurityDescriptor)
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{
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Security = new DirectorySecurity();
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Security.SetSecurityDescriptorBinaryForm(SecurityDescriptor);
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}
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FileDesc = new FileDesc(
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Directory.CreateDirectory(FileName, Security));
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}
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FileDesc.SetFileAttributes(FileAttributes);
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FileNode = default(Object);
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FileDesc0 = FileDesc;
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NormalizedName = default(String);
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return FileDesc.GetFileInfo(out FileInfo);
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}
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catch
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{
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if (null != FileDesc && null != FileDesc.Stream)
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FileDesc.Stream.Dispose();
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throw;
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}
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}
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public override Int32 Open(
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String FileName,
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UInt32 CreateOptions,
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UInt32 GrantedAccess,
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out Object FileNode,
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out Object FileDesc0,
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out FileInfo FileInfo,
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out String NormalizedName)
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{
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FileDesc FileDesc = null;
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try
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{
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FileName = ConcatPath(FileName);
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if (!Directory.Exists(FileName))
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{
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FileDesc = new FileDesc(
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new FileStream(
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FileName,
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FileMode.Open,
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(FileSystemRights)GrantedAccess,
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FileShare.Read | FileShare.Write | FileShare.Delete,
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4096,
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0));
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}
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else
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{
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FileDesc = new FileDesc(
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new DirectoryInfo(FileName));
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}
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FileNode = default(Object);
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FileDesc0 = FileDesc;
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NormalizedName = default(String);
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return FileDesc.GetFileInfo(out FileInfo);
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}
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catch
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{
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if (null != FileDesc && null != FileDesc.Stream)
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FileDesc.Stream.Dispose();
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throw;
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}
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}
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public override Int32 Overwrite(
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Object FileNode,
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Object FileDesc0,
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UInt32 FileAttributes,
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Boolean ReplaceFileAttributes,
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UInt64 AllocationSize,
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out FileInfo FileInfo)
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{
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FileDesc FileDesc = (FileDesc)FileDesc0;
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if (ReplaceFileAttributes)
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FileDesc.SetFileAttributes(FileAttributes);
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else if (0 != FileAttributes)
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FileDesc.SetFileAttributes(FileDesc.GetFileAttributes() | FileAttributes);
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FileDesc.Stream.SetLength(0);
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return FileDesc.GetFileInfo(out FileInfo);
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}
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public override void Cleanup(
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Object FileNode,
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Object FileDesc0,
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String FileName,
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UInt32 Flags)
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{
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FileDesc FileDesc = (FileDesc)FileDesc0;
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if (0 != (Flags & CleanupDelete))
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{
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FileDesc.SetDisposition(true);
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if (null != FileDesc.Stream)
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FileDesc.Stream.Dispose();
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}
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}
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public override void Close(
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Object FileNode,
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Object FileDesc0)
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{
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FileDesc FileDesc = (FileDesc)FileDesc0;
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if (null != FileDesc.Stream)
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FileDesc.Stream.Dispose();
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}
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public override Int32 Read(
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Object FileNode,
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Object FileDesc0,
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IntPtr Buffer,
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UInt64 Offset,
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UInt32 Length,
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out UInt32 BytesTransferred)
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{
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FileDesc FileDesc = (FileDesc)FileDesc0;
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if (Offset >= (UInt64)FileDesc.Stream.Length)
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ThrowIoExceptionWithNtStatus(STATUS_END_OF_FILE);
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Byte[] Bytes = new byte[Length];
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FileDesc.Stream.Seek((Int64)Offset, SeekOrigin.Begin);
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BytesTransferred = (UInt32)FileDesc.Stream.Read(Bytes, 0, Bytes.Length);
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Marshal.Copy(Bytes, 0, Buffer, BytesTransferred);
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return STATUS_SUCCESS;
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}
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public override Int32 Write(
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Object FileNode,
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Object FileDesc0,
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IntPtr Buffer,
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UInt64 Offset,
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UInt32 Length,
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Boolean WriteToEndOfFile,
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Boolean ConstrainedIo,
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out UInt32 BytesTransferred,
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out FileInfo FileInfo)
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{
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FileDesc FileDesc = (FileDesc)FileDesc0;
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if (ConstrainedIo)
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{
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if (Offset >= (UInt64)FileDesc.Stream.Length)
|
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{
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BytesTransferred = default(UInt32);
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FileInfo = default(FileInfo);
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return STATUS_SUCCESS;
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}
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if (Offset + Length > (UInt64)FileDesc.Stream.Length)
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Length = (UInt32)((UInt64)FileDesc.Stream.Length - Offset);
|
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}
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Byte[] Bytes = new byte[Length];
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Marshal.Copy(Buffer, Bytes, 0, Bytes.Length);
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if (!WriteToEndOfFile)
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FileDesc.Stream.Seek((Int64)Offset, SeekOrigin.Begin);
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FileDesc.Stream.Write(Bytes, 0, Bytes.Length);
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BytesTransferred = (UInt32)Bytes.Length;
|
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return FileDesc.GetFileInfo(out FileInfo);
|
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}
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public override Int32 Flush(
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Object FileNode,
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Object FileDesc0,
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out FileInfo FileInfo)
|
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{
|
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FileDesc FileDesc = (FileDesc)FileDesc0;
|
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if (null == FileDesc)
|
|
{
|
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/* we do not flush the whole volume, so just return SUCCESS */
|
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FileInfo = default(FileInfo);
|
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return STATUS_SUCCESS;
|
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}
|
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FileDesc.Stream.Flush(true);
|
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return FileDesc.GetFileInfo(out FileInfo);
|
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}
|
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public override Int32 GetFileInfo(
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Object FileNode,
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Object FileDesc0,
|
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out FileInfo FileInfo)
|
|
{
|
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FileDesc FileDesc = (FileDesc)FileDesc0;
|
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return FileDesc.GetFileInfo(out FileInfo);
|
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}
|
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public override Int32 SetBasicInfo(
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Object FileNode,
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Object FileDesc0,
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UInt32 FileAttributes,
|
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UInt64 CreationTime,
|
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UInt64 LastAccessTime,
|
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UInt64 LastWriteTime,
|
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UInt64 ChangeTime,
|
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out FileInfo FileInfo)
|
|
{
|
|
FileDesc FileDesc = (FileDesc)FileDesc0;
|
|
FileDesc.SetBasicInfo(FileAttributes, CreationTime, LastAccessTime, LastWriteTime);
|
|
return FileDesc.GetFileInfo(out FileInfo);
|
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}
|
|
public override Int32 SetFileSize(
|
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Object FileNode,
|
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Object FileDesc0,
|
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UInt64 NewSize,
|
|
Boolean SetAllocationSize,
|
|
out FileInfo FileInfo)
|
|
{
|
|
FileDesc FileDesc = (FileDesc)FileDesc0;
|
|
if (!SetAllocationSize || (UInt64)FileDesc.Stream.Length > NewSize)
|
|
{
|
|
/*
|
|
* "FileInfo.FileSize > NewSize" explanation:
|
|
* Ptfs does not support allocation size. However if the new AllocationSize
|
|
* is less than the current FileSize we must truncate the file.
|
|
*/
|
|
FileDesc.Stream.SetLength((Int64)NewSize);
|
|
}
|
|
return FileDesc.GetFileInfo(out FileInfo);
|
|
}
|
|
public override Int32 CanDelete(
|
|
Object FileNode,
|
|
Object FileDesc0,
|
|
String FileName)
|
|
{
|
|
FileDesc FileDesc = (FileDesc)FileDesc0;
|
|
FileDesc.SetDisposition(false);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
public override Int32 Rename(
|
|
Object FileNode,
|
|
Object FileDesc0,
|
|
String FileName,
|
|
String NewFileName,
|
|
Boolean ReplaceIfExists)
|
|
{
|
|
FileName = ConcatPath(FileName);
|
|
NewFileName = ConcatPath(NewFileName);
|
|
FileDesc.Rename(FileName, NewFileName, ReplaceIfExists);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
public override Int32 GetSecurity(
|
|
Object FileNode,
|
|
Object FileDesc0,
|
|
ref Byte[] SecurityDescriptor)
|
|
{
|
|
FileDesc FileDesc = (FileDesc)FileDesc0;
|
|
SecurityDescriptor = FileDesc.GetSecurityDescriptor();
|
|
return STATUS_SUCCESS;
|
|
}
|
|
public override Int32 SetSecurity(
|
|
Object FileNode,
|
|
Object FileDesc0,
|
|
AccessControlSections Sections,
|
|
Byte[] SecurityDescriptor)
|
|
{
|
|
FileDesc FileDesc = (FileDesc)FileDesc0;
|
|
FileDesc.SetSecurityDescriptor(Sections, SecurityDescriptor);
|
|
return STATUS_SUCCESS;
|
|
}
|
|
public override Boolean ReadDirectoryEntry(
|
|
Object FileNode,
|
|
Object FileDesc0,
|
|
String Pattern,
|
|
String Marker,
|
|
ref Object Context,
|
|
out String FileName,
|
|
out FileInfo FileInfo)
|
|
{
|
|
FileDesc FileDesc = (FileDesc)FileDesc0;
|
|
if (null == FileDesc.FileSystemInfos)
|
|
{
|
|
IEnumerable Enum = FileDesc.DirInfo.EnumerateFileSystemInfos(
|
|
null != Pattern ? Pattern : "*");
|
|
SortedList List = new SortedList();
|
|
List.Add(".", FileDesc.DirInfo);
|
|
List.Add("..", FileDesc.DirInfo.Parent);
|
|
foreach (FileSystemInfo Info in Enum)
|
|
List.Add(Info.Name, Info);
|
|
FileDesc.FileSystemInfos = new DictionaryEntry[List.Count];
|
|
List.CopyTo(FileDesc.FileSystemInfos, 0);
|
|
}
|
|
int Index;
|
|
if (null == Context)
|
|
{
|
|
Index = 0;
|
|
if (null != Marker)
|
|
{
|
|
Index = Array.BinarySearch(FileDesc.FileSystemInfos,
|
|
new DictionaryEntry(Marker, null),
|
|
_DirectoryEntryComparer);
|
|
if (0 <= Index)
|
|
Index++;
|
|
else
|
|
Index = ~Index;
|
|
}
|
|
}
|
|
else
|
|
Index = (int)Context;
|
|
if (FileDesc.FileSystemInfos.Length > Index)
|
|
{
|
|
Context = Index + 1;
|
|
FileName = (String)FileDesc.FileSystemInfos[Index].Key;
|
|
FileDesc.GetFileInfoFromFileSystemInfo(
|
|
(FileSystemInfo)FileDesc.FileSystemInfos[Index].Value,
|
|
out FileInfo);
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
FileName = default(String);
|
|
FileInfo = default(FileInfo);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
private String _Path;
|
|
}
|
|
#endif
|