Changeset 2549 for trunk/eraser/Eraser.Util/NativeMethods/Kernel.cs

Timestamp:

3/19/2012 8:06:33 AM (15 months ago)

Author:

lowjoel

Message:

Forward-port from Eraser 6.0: We need to recursively dereference all reparse points before we call GetVolumeNameForVolumeMountPoint?. This prevents a situation where we we get an invalid parameter error from GetVolumeNameForVolumeMountPoint? when we hand it a reparse point but it is not a volume reparse point.

Fixes bug in ​https://eraser.heidi.ie/forum/viewtopic.php?f=2&t=8684.

File:

• trunk/eraser/Eraser.Util/NativeMethods/Kernel.cs (modified) (2 diffs)

trunk/eraser/Eraser.Util/NativeMethods/Kernel.cs

@@ -652 +652 @@
         [DllImport("Kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
         [return: MarshalAs(UnmanagedType.Bool)]
-        public static extern bool DeviceIoControl(SafeFileHandle hDevice,
+        public extern static bool DeviceIoControl(SafeFileHandle hDevice,
             uint dwIoControlCode, IntPtr lpInBuffer, uint nInBufferSize,
             out NTFS_VOLUME_DATA_BUFFER lpOutBuffer, uint nOutBufferSize,
@@ -764 +764 @@
             /// </summary>
             public long ExtentLength;
+        }
+
+        public const uint FSCTL_GET_REPARSE_POINT = (9 << 16) | (42 << 2);
+
+        /// <summary>
+        /// The REPARSE_DATA_BUFFER structure contains reparse point data for a
+        /// Microsoft reparse point. (Third-party reparse point owners must use
+        /// the REPARSE_GUID_DATA_BUFFER structure instead.) 
+        /// </summary>
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+        public struct REPARSE_DATA_BUFFER
+        {
+            /// <summary>
+            /// Contains the reparse point information for a Symbolic Link.
+            /// </summary>
+            /// <remarks>The PathBuffer member found at the end of the C structure
+            /// declaration is appended at the end of this structure.</remarks>
+            [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+            public struct SymbolicLinkReparseBuffer
+            {
+                /// <summary>
+                /// Offset, in bytes, of the substitute name string in the PathBuffer
+                /// array. Note that this offset must be divided by sizeof(char) to
+                /// get the array index.
+                /// </summary>
+                public ushort SubstituteNameOffset;
+
+                /// <summary>
+                /// Length, in bytes, of the substitute name string. If this string is
+                /// NULL-terminated, SubstituteNameLength does not include space for
+                /// the UNICODE_NULL character.
+                /// </summary>
+                public ushort SubstituteNameLength;
+
+                /// <summary>
+                /// Offset, in bytes, of the print name string in the PathBuffer array.
+                /// Note that this offset must be divided by sizeof(char) to get the
+                /// array index.
+                /// </summary>
+                public ushort PrintNameOffset;
+
+                /// <summary>
+                /// Length, in bytes, of the print name string. If this string is
+                /// NULL-terminated, PrintNameLength does not include space for the
+                /// UNICODE_NULL character.
+                /// </summary>
+                public ushort PrintNameLength;
+
+                /// <summary>
+                /// Used to indicate if the given symbolic link is an absolute or relative
+                /// symbolic link. If Flags contains SYMLINK_FLAG_RELATIVE, the symbolic
+                /// link contained in the PathBuffer array (at offset SubstitueNameOffset)
+                /// is processed as a relative symbolic link; otherwise, it is processed
+                /// as an absolute symbolic link.
+                /// </summary>
+                public SymbolicLinkFlags Flags;
+            }
+
+            /// <summary>
+            /// Contains the reparse point information for a Directory Junction.
+            /// </summary>
+            /// <remarks>The PathBuffer member found at the end of the C structure
+            /// declaration is appended at the end of this structure.</remarks>
+            [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
+            public struct MountPointReparseBuffer
+            {
+                /// <summary>
+                /// Offset, in bytes, of the substitute name string in the PathBuffer
+                /// array. Note that this offset must be divided by sizeof(char) to
+                /// get the array index.
+                /// </summary>
+                public ushort SubstituteNameOffset;
+
+                /// <summary>
+                /// Length, in bytes, of the substitute name string. If this string is
+                /// NULL-terminated, SubstituteNameLength does not include space for
+                /// the UNICODE_NULL character.
+                /// </summary>
+                public ushort SubstituteNameLength;
+
+                /// <summary>
+                /// Offset, in bytes, of the print name string in the PathBuffer array.
+                /// Note that this offset must be divided by sizeof(char) to get the
+                /// array index.
+                /// </summary>
+                public ushort PrintNameOffset;
+
+                /// <summary>
+                /// Length, in bytes, of the print name string. If this string is
+                /// NULL-terminated, PrintNameLength does not include space for the
+                /// UNICODE_NULL character.
+                /// </summary>
+                public ushort PrintNameLength;
+            }
+
+            [Flags]
+            public enum SymbolicLinkFlags
+            {
+                /// <summary>
+                /// <see cref="SymbolicLinkReparseBuffer.Flags"/>
+                /// </summary>
+                SYMLINK_FLAG_RELATIVE = 0x00000001
+            }
+
+            /// <summary>
+            /// Reparse point tag. Must be a Microsoft reparse point tag. (See the following Remarks section.)
+            /// </summary>
+            public REPARSE_DATA_TAG ReparseTag;
+
+            /// <summary>
+            /// Size, in bytes, of the reparse data in the DataBuffer member.
+            /// </summary>
+            public ushort ReparseDataLength;
+            ushort Reserved;
+        }
+
+        /// <summary>
+        /// See http://msdn.microsoft.com/en-us/library/windows/desktop/aa365511%28v=vs.85%29.aspx.
+        /// </summary>
+        public enum REPARSE_DATA_TAG : uint
+        {
+            IO_REPARSE_TAG_MOUNT_POINT = 0xA0000003,
+            IO_REPARSE_TAG_HSM = 0xC0000004,
+            IO_REPARSE_TAG_HSM2 = 0x80000006,
+            IO_REPARSE_TAG_SIS = 0x80000007,
+            IO_REPARSE_TAG_WIM = 0x80000008,
+            IO_REPARSE_TAG_CSV = 0x80000009,
+            IO_REPARSE_TAG_DFS = 0x8000000A,
+            IO_REPARSE_TAG_SYMLINK = 0xA000000C,
+            IO_REPARSE_TAG_DFSR = 0x80000012
         }