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Added support for the fossil file system.

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Natalia Portillo
2017-08-07 16:15:57 +01:00
parent 01656b767b
commit 31ae326f0c
3 changed files with 241 additions and 4 deletions
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3
DiscImageChef.Filesystems/DiscImageChef.Filesystems.csproj
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@@ -127,6 +127,7 @@
<Compile Include="AppleDOS\Xattr.cs" />
<Compile Include="AtheOS.cs" />
<Compile Include="HAMMER.cs" />
<Compile Include="Fossil.cs" />
</ItemGroup>
<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
<ItemGroup>
@@ -187,7 +188,7 @@
<inheritsSet />
<inheritsScope />
</TextStylePolicy>
<CSharpFormattingPolicy IndentBlock="True" IndentBraces="False" IndentSwitchSection="True" IndentSwitchCaseSection="True" LabelPositioning="OneLess" NewLinesForBracesInTypes="True" NewLinesForBracesInMethods="True" NewLinesForBracesInProperties="True" NewLinesForBracesInAccessors="True" NewLinesForBracesInAnonymousMethods="True" NewLinesForBracesInControlBlocks="True" NewLinesForBracesInAnonymousTypes="True" NewLinesForBracesInObjectCollectionArrayInitializers="True" NewLinesForBracesInLambdaExpressionBody="True" NewLineForElse="True" NewLineForCatch="True" NewLineForFinally="True" NewLineForMembersInObjectInit="True" NewLineForMembersInAnonymousTypes="True" NewLineForClausesInQuery="True" SpacingAfterMethodDeclarationName="False" SpaceWithinMethodDeclarationParenthesis="False" SpaceBetweenEmptyMethodDeclarationParentheses="False" SpaceAfterMethodCallName="False" SpaceWithinMethodCallParentheses="False" SpaceBetweenEmptyMethodCallParentheses="False" SpaceAfterControlFlowStatementKeyword="False" SpaceWithinExpressionParentheses="False" SpaceWithinCastParentheses="False" SpaceWithinOtherParentheses="False" SpaceAfterCast="False" SpacesIgnoreAroundVariableDeclaration="False" SpaceBeforeOpenSquareBracket="False" SpaceBetweenEmptySquareBrackets="False" SpaceWithinSquareBrackets="False" SpaceAfterColonInBaseTypeDeclaration="True" SpaceAfterComma="True" SpaceAfterDot="False" SpaceAfterSemicolonsInForStatement="True" SpaceBeforeColonInBaseTypeDeclaration="True" SpaceBeforeComma="False" SpaceBeforeDot="False" SpaceBeforeSemicolonsInForStatement="False" SpacingAroundBinaryOperator="Single" WrappingPreserveSingleLine="True" WrappingKeepStatementsOnSingleLine="True" PlaceSystemDirectiveFirst="True" scope="text/x-csharp">
<CSharpFormattingPolicy IndentBlock="True" IndentBraces="False" IndentSwitchSection="True" IndentSwitchCaseSection="True" LabelPositioning="OneLess" NewLinesForBracesInTypes="True" NewLinesForBracesInMethods="True" NewLinesForBracesInProperties="True" NewLinesForBracesInAccessors="True" NewLinesForBracesInAnonymousMethods="True" NewLinesForBracesInControlBlocks="True" NewLinesForBracesInAnonymousTypes="True" NewLinesForBracesInObjectCollectionArrayInitializers="True" NewLinesForBracesInLambdaExpressionBody="True" NewLineForElse="True" NewLineForCatch="True" NewLineForFinally="True" NewLineForMembersInObjectInit="True" NewLineForMembersInAnonymousTypes="True" NewLineForClausesInQuery="True" SpacingAfterMethodDeclarationName="False" SpaceWithinMethodDeclarationParenthesis="False" SpaceBetweenEmptyMethodDeclarationParentheses="False" SpaceAfterMethodCallName="False" SpaceWithinMethodCallParentheses="False" SpaceBetweenEmptyMethodCallParentheses="False" SpaceWithinExpressionParentheses="False" SpaceWithinCastParentheses="False" SpaceWithinOtherParentheses="False" SpaceAfterCast="False" SpacesIgnoreAroundVariableDeclaration="False" SpaceBeforeOpenSquareBracket="False" SpaceBetweenEmptySquareBrackets="False" SpaceWithinSquareBrackets="False" SpaceAfterColonInBaseTypeDeclaration="True" SpaceAfterComma="True" SpaceAfterDot="False" SpaceAfterSemicolonsInForStatement="True" SpaceBeforeColonInBaseTypeDeclaration="True" SpaceBeforeComma="False" SpaceBeforeDot="False" SpaceBeforeSemicolonsInForStatement="False" SpacingAroundBinaryOperator="Single" WrappingPreserveSingleLine="True" WrappingKeepStatementsOnSingleLine="True" PlaceSystemDirectiveFirst="True" SpaceAfterControlFlowStatementKeyword="False" scope="text/x-csharp">
<inheritsSet />
<inheritsScope />
</CSharpFormattingPolicy>

241
DiscImageChef.Filesystems/Fossil.cs
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@@ -9,7 +9,7 @@
//
// --[ Description ] ----------------------------------------------------------
//
// Description
// Identifies the Fossil filesystem and shows information.
//
// --[ License ] --------------------------------------------------------------
//
@@ -29,13 +29,248 @@
// ----------------------------------------------------------------------------
// Copyright © 2011-2017 Natalia Portillo
// ****************************************************************************/
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Text;
using DiscImageChef.CommonTypes;
using DiscImageChef.Console;
namespace DiscImageChef.Filesystems
{
public class Fossil
public class Fossil : Filesystem
{
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct FossilHeader
{
/// <summary>
/// Magic number
/// </summary>
public uint magic;
/// <summary>
/// Header version
/// </summary>
public ushort version;
/// <summary>
/// Block size
/// </summary>
public ushort blockSize;
/// <summary>
/// Block containing superblock
/// </summary>
public uint super;
/// <summary>
/// Block containing labels
/// </summary>
public uint label;
/// <summary>
/// Where do data blocks start
/// </summary>
public uint data;
/// <summary>
/// How many data blocks does it have
/// </summary>
public uint end;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct FossilSuperBlock
{
/// <summary>
/// Magic number
/// </summary>
public uint magic;
/// <summary>
/// Header version
/// </summary>
public ushort version;
/// <summary>
/// file system low epoch
/// </summary>
public uint epochLow;
/// <summary>
/// file system high(active) epoch
/// </summary>
public uint epochHigh;
/// <summary>
/// next qid to allocate
/// </summary>
public ulong qid;
/// <summary>
/// data block number: root of active file system
/// </summary>
public int active;
/// <summary>
/// data block number: root of next file system to archive
/// </summary>
public int next;
/// <summary>
/// data block number: root of file system currently being archived
/// </summary>
public int current;
/// <summary>
/// Venti score of last successful archive
/// </summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
public byte[] last;
/// <summary>
/// name of file system(just a comment)
/// </summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)]
public byte[] name;
}
const uint Fossil_HdrMagic = 0x3776AE89;
const uint Fossil_SbMagic = 0x2340A3B1;
// Fossil header starts at 128KiB
const ulong HeaderPos = 128 * 1024;
public Fossil()
{
Name = "Fossil Filesystem Plugin";
PluginUUID = new Guid("932BF104-43F6-494F-973C-45EF58A51DA9");
CurrentEncoding = Encoding.UTF8;
}
public Fossil(ImagePlugins.ImagePlugin imagePlugin, Partition partition, Encoding encoding)
{
Name = "Fossil Filesystem Plugin";
PluginUUID = new Guid("932BF104-43F6-494F-973C-45EF58A51DA9");
// Technically everything on Plan 9 from Bell Labs is in UTF-8
CurrentEncoding = Encoding.UTF8;
}
public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition)
{
ulong hdrSector = HeaderPos / imagePlugin.GetSectorSize();
FossilHeader hdr = new FossilHeader();
byte[] sector = imagePlugin.ReadSector(partition.Start + hdrSector);
hdr = BigEndianMarshal.ByteArrayToStructureBigEndian<FossilHeader>(sector);
DicConsole.DebugWriteLine("Fossil plugin", "magic at 0x{0:X8} (expected 0x{1:X8})", hdr.magic, Fossil_HdrMagic);
return hdr.magic == Fossil_HdrMagic;
}
public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information)
{
information = "";
if(imagePlugin.GetSectorSize() < 512)
return;
ulong hdrSector = HeaderPos / imagePlugin.GetSectorSize();
FossilHeader hdr = new FossilHeader();
byte[] sector = imagePlugin.ReadSector(partition.Start + hdrSector);
hdr = BigEndianMarshal.ByteArrayToStructureBigEndian<FossilHeader>(sector);
DicConsole.DebugWriteLine("Fossil plugin", "magic at 0x{0:X8} (expected 0x{1:X8})", hdr.magic, Fossil_HdrMagic);
StringBuilder sb = new StringBuilder();
sb.AppendLine("Fossil");
sb.AppendFormat("Filesystem version {0}", hdr.version).AppendLine();
sb.AppendFormat("{0} bytes per block", hdr.blockSize).AppendLine();
sb.AppendFormat("Superblock resides in block {0}", hdr.super).AppendLine();
sb.AppendFormat("Labels resides in block {0}", hdr.label).AppendLine();
sb.AppendFormat("Data starts at block {0}", hdr.data).AppendLine();
sb.AppendFormat("Volume has {0} blocks", hdr.end).AppendLine();
ulong sbLocation = (hdr.super * (hdr.blockSize / imagePlugin.GetSectorSize())) + partition.Start;
xmlFSType = new Schemas.FileSystemType
{
Type = "Fossil filesystem",
ClusterSize = hdr.blockSize,
Clusters = hdr.end
};
if(sbLocation <= partition.End)
{
sector = imagePlugin.ReadSector(sbLocation);
System.Console.WriteLine("Searching for superblock on sector {0}", sbLocation);
FossilSuperBlock fsb = BigEndianMarshal.ByteArrayToStructureBigEndian<FossilSuperBlock>(sector);
DicConsole.DebugWriteLine("Fossil plugin", "magic 0x{0:X8} (expected 0x{1:X8})", fsb.magic, Fossil_SbMagic);
if(fsb.magic == Fossil_SbMagic)
{
sb.AppendFormat("Epoch low {0}", fsb.epochLow).AppendLine();
sb.AppendFormat("Epoch high {0}", fsb.epochHigh).AppendLine();
sb.AppendFormat("Next QID {0}", fsb.qid).AppendLine();
sb.AppendFormat("Active root block {0}", fsb.active).AppendLine();
sb.AppendFormat("Next root block {0}", fsb.next).AppendLine();
sb.AppendFormat("Curren root block {0}", fsb.current).AppendLine();
sb.AppendFormat("Volume label: \"{0}\"", StringHandlers.CToString(fsb.name, CurrentEncoding)).AppendLine();
xmlFSType.VolumeName = StringHandlers.CToString(fsb.name, CurrentEncoding);
}
}
information = sb.ToString();
}
public override Errno Mount()
{
return Errno.NotImplemented;
}
public override Errno Mount(bool debug)
{
return Errno.NotImplemented;
}
public override Errno Unmount()
{
return Errno.NotImplemented;
}
public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock)
{
return Errno.NotImplemented;
}
public override Errno GetAttributes(string path, ref FileAttributes attributes)
{
return Errno.NotImplemented;
}
public override Errno ListXAttr(string path, ref List<string> xattrs)
{
return Errno.NotImplemented;
}
public override Errno GetXattr(string path, string xattr, ref byte[] buf)
{
return Errno.NotImplemented;
}
public override Errno Read(string path, long offset, long size, ref byte[] buf)
{
return Errno.NotImplemented;
}
public override Errno ReadDir(string path, ref List<string> contents)
{
return Errno.NotImplemented;
}
public override Errno StatFs(ref FileSystemInfo stat)
{
return Errno.NotImplemented;
}
public override Errno Stat(string path, ref FileEntryInfo stat)
{
return Errno.NotImplemented;
}
public override Errno ReadLink(string path, ref string dest)
{
return Errno.NotImplemented;
}
}
}
}

1
README.md
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@@ -125,6 +125,7 @@ Supported file systems for identification and information only
* DEC Files-11 (only checked with On Disk Structure 2, ODS-2)
* ECMA-67: 130mm Flexible Disk Cartridge Labelling and File Structure for Information Interchange
* Flash-Friendly File System (F2FS)
* Fossil file system (from Plan9)
* HAMMER file system
* IBM Journaling File System (JFS)
* ISO9660