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337 lines
13 KiB
C#
337 lines
13 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : JFS.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Component
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the IBM JFS filesystem and shows information.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2017 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System.Text;
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using DiscImageChef.CommonTypes;
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namespace DiscImageChef.Filesystems
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{
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public class JFS : Filesystem
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{
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[Flags]
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enum JFS_Flags : uint
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{
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Unicode = 0x00000001,
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RemountRO = 0x00000002,
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Continue = 0x00000004,
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Panic = 0x00000008,
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UserQuota = 0x00000010,
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GroupQuota = 0x00000020,
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NoJournal = 0x00000040,
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Discard = 0x00000080,
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GroupCommit = 0x00000100,
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LazyCommit = 0x00000200,
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Temporary = 0x00000400,
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InlineLog = 0x00000800,
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InlineMoving = 0x00001000,
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BadSAIT = 0x00010000,
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Sparse = 0x00020000,
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DASDEnabled = 0x00040000,
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DASDPrime = 0x00080000,
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SwapBytes = 0x00100000,
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DirIndex = 0x00200000,
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Linux = 0x10000000,
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DFS = 0x20000000,
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OS2 = 0x40000000,
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AIX = 0x80000000
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}
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[Flags]
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enum JFS_State : uint
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{
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Clean = 0,
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Mounted = 1,
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Dirty = 2,
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Logredo = 4,
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Extendfs = 8
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct JFS_Extent
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{
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/// <summary>
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/// Leftmost 24 bits are extent length, rest 8 bits are most significant for <see cref="addr2"/>
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/// </summary>
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public uint len_addr;
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public uint addr2;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct JFS_TimeStruct
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{
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public uint tv_sec;
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public uint tv_nsec;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct JFS_SuperBlock
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{
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public uint s_magic;
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public uint s_version;
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public ulong s_size;
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public uint s_bsize;
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public ushort s_l2bsize;
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public ushort s_l2bfactor;
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public uint s_pbsize;
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public ushort s_l1pbsize;
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public ushort pad;
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public uint s_agsize;
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public JFS_Flags s_flags;
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public JFS_State s_state;
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public uint s_compress;
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public JFS_Extent s_ait2;
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public JFS_Extent s_aim2;
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public uint s_logdev;
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public uint s_logserial;
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public JFS_Extent s_logpxd;
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public JFS_Extent s_fsckpxd;
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public JFS_TimeStruct s_time;
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public uint s_fsckloglen;
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public sbyte s_fscklog;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 11)]
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public byte[] s_fpack;
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public ulong s_xsize;
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public JFS_Extent s_xfsckpxd;
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public JFS_Extent s_xlogpxd;
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public Guid s_uuid;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
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public byte[] s_label;
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public Guid s_loguuid;
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}
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const uint JFS_BootBlocksSize = 0x8000;
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const uint JFS_Magic = 0x3153464A;
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public JFS()
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{
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Name = "JFS Plugin";
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PluginUUID = new Guid("D3BE2A41-8F28-4055-94DC-BB6C72A0E9C4");
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CurrentEncoding = Encoding.GetEncoding("iso-8859-15");
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}
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public JFS(Encoding encoding)
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{
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Name = "JFS Plugin";
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PluginUUID = new Guid("D3BE2A41-8F28-4055-94DC-BB6C72A0E9C4");
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if(encoding == null)
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CurrentEncoding = Encoding.GetEncoding("iso-8859-15");
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else
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CurrentEncoding = encoding;
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}
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public JFS(ImagePlugins.ImagePlugin imagePlugin, Partition partition, Encoding encoding)
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{
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Name = "JFS Plugin";
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PluginUUID = new Guid("D3BE2A41-8F28-4055-94DC-BB6C72A0E9C4");
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if(encoding == null)
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CurrentEncoding = Encoding.GetEncoding("iso-8859-15");
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else
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CurrentEncoding = encoding;
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}
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public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition)
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{
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uint bootSectors = JFS_BootBlocksSize / imagePlugin.GetSectorSize();
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if(partition.Start + bootSectors >= partition.End)
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return false;
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byte[] sector = imagePlugin.ReadSector(partition.Start + bootSectors);
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if(sector.Length < 512)
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return false;
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JFS_SuperBlock jfsSb = new JFS_SuperBlock();
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IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(jfsSb));
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Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(jfsSb));
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jfsSb = (JFS_SuperBlock)Marshal.PtrToStructure(sbPtr, typeof(JFS_SuperBlock));
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Marshal.FreeHGlobal(sbPtr);
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return jfsSb.s_magic == JFS_Magic;
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}
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public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information)
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{
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information = "";
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StringBuilder sb = new StringBuilder();
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uint bootSectors = JFS_BootBlocksSize / imagePlugin.GetSectorSize();
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byte[] sector = imagePlugin.ReadSector(partition.Start + bootSectors);
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if(sector.Length < 512)
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return;
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JFS_SuperBlock jfsSb = new JFS_SuperBlock();
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IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(jfsSb));
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Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(jfsSb));
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jfsSb = (JFS_SuperBlock)Marshal.PtrToStructure(sbPtr, typeof(JFS_SuperBlock));
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Marshal.FreeHGlobal(sbPtr);
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sb.AppendLine("JFS filesystem");
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sb.AppendFormat("Version {0}", jfsSb.s_version).AppendLine();
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sb.AppendFormat("{0} blocks of {1} bytes", jfsSb.s_size, jfsSb.s_bsize).AppendLine();
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sb.AppendFormat("{0} blocks per allocation group", jfsSb.s_agsize).AppendLine();
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if(jfsSb.s_flags.HasFlag(JFS_Flags.Unicode))
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sb.AppendLine("Volume uses Unicode for directory entries");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.RemountRO))
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sb.AppendLine("Volume remounts read-only on error");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.Continue))
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sb.AppendLine("Volume continues on error");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.Panic))
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sb.AppendLine("Volume panics on error");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.UserQuota))
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sb.AppendLine("Volume has user quotas enabled");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.GroupQuota))
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sb.AppendLine("Volume has group quotas enabled");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.NoJournal))
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sb.AppendLine("Volume is not using any journal");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.Discard))
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sb.AppendLine("Volume sends TRIM/UNMAP commands to underlying device");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.GroupCommit))
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sb.AppendLine("Volume commits in groups of 1");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.LazyCommit))
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sb.AppendLine("Volume commits lazy");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.Temporary))
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sb.AppendLine("Volume does not commit to log");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.InlineLog))
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sb.AppendLine("Volume has log withing itself");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.InlineMoving))
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sb.AppendLine("Volume has log withing itself and is moving it out");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.BadSAIT))
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sb.AppendLine("Volume has bad current secondary ait");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.Sparse))
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sb.AppendLine("Volume supports sparse files");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.DASDEnabled))
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sb.AppendLine("Volume has DASD limits enabled");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.DASDPrime))
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sb.AppendLine("Volume primes DASD on boot");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.SwapBytes))
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sb.AppendLine("Volume is in a big-endian system");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.DirIndex))
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sb.AppendLine("Volume has presistent indexes");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.Linux))
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sb.AppendLine("Volume supports Linux");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.DFS))
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sb.AppendLine("Volume supports DCE DFS LFS");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.OS2))
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sb.AppendLine("Volume supports OS/2, and is case insensitive");
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if(jfsSb.s_flags.HasFlag(JFS_Flags.AIX))
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sb.AppendLine("Volume supports AIX");
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if(jfsSb.s_state != 0)
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sb.AppendLine("Volume is dirty");
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sb.AppendFormat("Volume was last updated on {0}", DateHandlers.UNIXUnsignedToDateTime(jfsSb.s_time.tv_sec, jfsSb.s_time.tv_nsec)).AppendLine();
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if(jfsSb.s_version == 1)
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sb.AppendFormat("Volume name: {0}", CurrentEncoding.GetString(jfsSb.s_fpack)).AppendLine();
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else
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sb.AppendFormat("Volume name: {0}", CurrentEncoding.GetString(jfsSb.s_label)).AppendLine();
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sb.AppendFormat("Volume UUID: {0}", jfsSb.s_uuid).AppendLine();
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xmlFSType = new Schemas.FileSystemType();
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xmlFSType.Type = "JFS filesystem";
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xmlFSType.Clusters = (long)jfsSb.s_size;
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xmlFSType.ClusterSize = (int)jfsSb.s_bsize;
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xmlFSType.Bootable = true;
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if(jfsSb.s_version == 1)
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xmlFSType.VolumeName = CurrentEncoding.GetString(jfsSb.s_fpack);
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else
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xmlFSType.VolumeName = CurrentEncoding.GetString(jfsSb.s_label);
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xmlFSType.VolumeSerial = string.Format("{0}", jfsSb.s_uuid);
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xmlFSType.ModificationDate = DateHandlers.UNIXUnsignedToDateTime(jfsSb.s_time.tv_sec, jfsSb.s_time.tv_nsec);
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xmlFSType.ModificationDateSpecified = true;
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if(jfsSb.s_state != 0)
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xmlFSType.Dirty = true;
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information = sb.ToString();
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return;
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}
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public override Errno Mount()
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{
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return Errno.NotImplemented;
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}
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public override Errno Mount(bool debug)
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{
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return Errno.NotImplemented;
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}
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public override Errno Unmount()
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{
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return Errno.NotImplemented;
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}
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public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetAttributes(string path, ref FileAttributes attributes)
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{
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return Errno.NotImplemented;
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}
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public override Errno ListXAttr(string path, ref List<string> xattrs)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetXattr(string path, string xattr, ref byte[] buf)
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{
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return Errno.NotImplemented;
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}
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public override Errno Read(string path, long offset, long size, ref byte[] buf)
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{
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return Errno.NotImplemented;
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}
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public override Errno ReadDir(string path, ref List<string> contents)
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{
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return Errno.NotImplemented;
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}
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public override Errno StatFs(ref FileSystemInfo stat)
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{
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return Errno.NotImplemented;
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}
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public override Errno Stat(string path, ref FileEntryInfo stat)
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{
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return Errno.NotImplemented;
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}
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public override Errno ReadLink(string path, ref string dest)
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{
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return Errno.NotImplemented;
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}
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}
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} |