// /*************************************************************************** // The Disc Image Chef // ---------------------------------------------------------------------------- // // Filename : Reiser.cs // Author(s) : Natalia Portillo // // Component : Component // // --[ Description ] ---------------------------------------------------------- // // Identifies the Reiser filesystem and shows information. // // --[ License ] -------------------------------------------------------------- // // This library is free software; you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as // published by the Free Software Foundation; either version 2.1 of the // License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, see . // // ---------------------------------------------------------------------------- // Copyright © 2011-2017 Natalia Portillo // ****************************************************************************/ using System; using System.Collections.Generic; using System.Linq; using System.Runtime.InteropServices; using System.Text; using DiscImageChef.CommonTypes; namespace DiscImageChef.Filesystems { public class Reiser : Filesystem { [StructLayout(LayoutKind.Sequential, Pack = 1)] struct ReiserJournalParams { public uint journal_1stblock; public uint journal_dev; public uint journal_size; public uint journal_trans_max; public uint journal_magic; public uint journal_max_batch; public uint journal_max_commit_age; public uint journal_max_trans_age; } [StructLayout(LayoutKind.Sequential, Pack = 1)] struct Reiser_Superblock { public uint block_count; public uint free_blocks; public uint root_block; public ReiserJournalParams journal; public ushort blocksize; public ushort oid_maxsize; public ushort oid_cursize; public ushort umount_state; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)] public byte[] magic; public ushort fs_state; public uint hash_function_code; public ushort tree_height; public ushort bmap_nr; public ushort version; public ushort reserved_for_journal; public uint inode_generation; public uint flags; public Guid uuid; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] label; public ushort mnt_count; public ushort max_mnt_count; public uint last_check; public uint check_interval; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 76)] public byte[] unused; } readonly byte[] Reiser35_Magic = { 0x52, 0x65, 0x49, 0x73, 0x45, 0x72, 0x46, 0x73, 0x00, 0x00 }; readonly byte[] Reiser36_Magic = { 0x52, 0x65, 0x49, 0x73, 0x45, 0x72, 0x32, 0x46, 0x73, 0x00 }; readonly byte[] ReiserJr_Magic = { 0x52, 0x65, 0x49, 0x73, 0x45, 0x72, 0x33, 0x46, 0x73, 0x00 }; const uint Reiser_SuperOffset = 0x10000; public Reiser() { Name = "Reiser Filesystem Plugin"; PluginUUID = new Guid("1D8CD8B8-27E6-410F-9973-D16409225FBA"); CurrentEncoding = Encoding.GetEncoding("iso-8859-15"); } public Reiser(ImagePlugins.ImagePlugin imagePlugin, Partition partition, Encoding encoding) { Name = "Reiser Filesystem Plugin"; PluginUUID = new Guid("1D8CD8B8-27E6-410F-9973-D16409225FBA"); if(encoding == null) CurrentEncoding = Encoding.GetEncoding("iso-8859-15"); } public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition) { if(imagePlugin.GetSectorSize() < 512) return false; uint sbAddr = Reiser_SuperOffset / imagePlugin.GetSectorSize(); if(sbAddr == 0) sbAddr = 1; Reiser_Superblock reiserSb = new Reiser_Superblock(); uint sbSize = (uint)(Marshal.SizeOf(reiserSb) / imagePlugin.GetSectorSize()); if(Marshal.SizeOf(reiserSb) % imagePlugin.GetSectorSize() != 0) sbSize++; byte[] sector = imagePlugin.ReadSectors(partition.Start + sbAddr, sbSize); if(sector.Length < Marshal.SizeOf(reiserSb)) return false; IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(reiserSb)); Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(reiserSb)); reiserSb = (Reiser_Superblock)Marshal.PtrToStructure(sbPtr, typeof(Reiser_Superblock)); Marshal.FreeHGlobal(sbPtr); return Reiser35_Magic.SequenceEqual(reiserSb.magic) || Reiser36_Magic.SequenceEqual(reiserSb.magic) || ReiserJr_Magic.SequenceEqual(reiserSb.magic); } public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, Partition partition, out string information) { information = ""; if(imagePlugin.GetSectorSize() < 512) return; uint sbAddr = Reiser_SuperOffset / imagePlugin.GetSectorSize(); if(sbAddr == 0) sbAddr = 1; Reiser_Superblock reiserSb = new Reiser_Superblock(); uint sbSize = (uint)(Marshal.SizeOf(reiserSb) / imagePlugin.GetSectorSize()); if(Marshal.SizeOf(reiserSb) % imagePlugin.GetSectorSize() != 0) sbSize++; byte[] sector = imagePlugin.ReadSectors(partition.Start + sbAddr, sbSize); if(sector.Length < Marshal.SizeOf(reiserSb)) return; IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(reiserSb)); Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(reiserSb)); reiserSb = (Reiser_Superblock)Marshal.PtrToStructure(sbPtr, typeof(Reiser_Superblock)); Marshal.FreeHGlobal(sbPtr); if(!Reiser35_Magic.SequenceEqual(reiserSb.magic) && !Reiser36_Magic.SequenceEqual(reiserSb.magic) && !ReiserJr_Magic.SequenceEqual(reiserSb.magic)) return; StringBuilder sb = new StringBuilder(); if(Reiser35_Magic.SequenceEqual(reiserSb.magic)) sb.AppendLine("Reiser 3.5 filesystem"); else if(Reiser36_Magic.SequenceEqual(reiserSb.magic)) sb.AppendLine("Reiser 3.6 filesystem"); else if(ReiserJr_Magic.SequenceEqual(reiserSb.magic)) sb.AppendLine("Reiser Jr. filesystem"); sb.AppendFormat("Volume has {0} blocks with {1} blocks free", reiserSb.block_count, reiserSb.free_blocks).AppendLine(); sb.AppendFormat("{0} bytes per block", reiserSb.blocksize).AppendLine(); sb.AppendFormat("Root directory resides on block {0}", reiserSb.root_block).AppendLine(); if(reiserSb.umount_state == 2) sb.AppendLine("Volume has not been cleanly umounted"); sb.AppendFormat("Volume last checked on {0}", DateHandlers.UNIXUnsignedToDateTime(reiserSb.last_check)).AppendLine(); if(reiserSb.version >= 2) { sb.AppendFormat("Volume UUID: {0}", reiserSb.uuid).AppendLine(); sb.AppendFormat("Volume name: {0}", CurrentEncoding.GetString(reiserSb.label)).AppendLine(); } information = sb.ToString(); xmlFSType = new Schemas.FileSystemType(); if(Reiser35_Magic.SequenceEqual(reiserSb.magic)) xmlFSType.Type = "Reiser 3.5 filesystem"; else if(Reiser36_Magic.SequenceEqual(reiserSb.magic)) xmlFSType.Type = "Reiser 3.6 filesystem"; else if(ReiserJr_Magic.SequenceEqual(reiserSb.magic)) xmlFSType.Type = "Reiser Jr. filesystem"; xmlFSType.ClusterSize = reiserSb.blocksize; xmlFSType.Clusters = reiserSb.block_count; xmlFSType.FreeClusters = reiserSb.free_blocks; xmlFSType.FreeClustersSpecified = true; xmlFSType.Dirty = reiserSb.umount_state == 2; if(reiserSb.version >= 2) { xmlFSType.VolumeName = CurrentEncoding.GetString(reiserSb.label); xmlFSType.VolumeSerial = reiserSb.uuid.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 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 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; } } }