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120 lines
4.5 KiB
C#
120 lines
4.5 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Info.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Reiser4 filesystem plugin
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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 © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System.Linq;
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using System.Text;
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using Aaru.CommonTypes.AaruMetadata;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Helpers;
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using Partition = Aaru.CommonTypes.Partition;
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namespace Aaru.Filesystems;
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/// <inheritdoc />
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/// <summary>Implements detection of the Reiser v4 filesystem</summary>
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public sealed partial class Reiser4
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{
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#region IFilesystem Members
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/// <inheritdoc />
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public bool Identify(IMediaImage imagePlugin, Partition partition)
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{
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if(imagePlugin.Info.SectorSize < 512) return false;
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uint sbAddr = REISER4_SUPER_OFFSET / imagePlugin.Info.SectorSize;
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if(sbAddr == 0) sbAddr = 1;
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var sbSize = (uint)(Marshal.SizeOf<Superblock>() / imagePlugin.Info.SectorSize);
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if(Marshal.SizeOf<Superblock>() % imagePlugin.Info.SectorSize != 0) sbSize++;
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if(partition.Start + sbAddr + sbSize >= partition.End) return false;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start + sbAddr, sbSize, out byte[] sector);
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if(errno != ErrorNumber.NoError) return false;
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if(sector.Length < Marshal.SizeOf<Superblock>()) return false;
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Superblock reiserSb = Marshal.ByteArrayToStructureLittleEndian<Superblock>(sector);
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return _magic.SequenceEqual(reiserSb.magic);
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}
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/// <inheritdoc />
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public void GetInformation(IMediaImage imagePlugin, Partition partition, Encoding encoding, out string information,
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out FileSystem metadata)
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{
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encoding ??= Encoding.GetEncoding("iso-8859-15");
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information = "";
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metadata = new FileSystem();
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if(imagePlugin.Info.SectorSize < 512) return;
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uint sbAddr = REISER4_SUPER_OFFSET / imagePlugin.Info.SectorSize;
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if(sbAddr == 0) sbAddr = 1;
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var sbSize = (uint)(Marshal.SizeOf<Superblock>() / imagePlugin.Info.SectorSize);
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if(Marshal.SizeOf<Superblock>() % imagePlugin.Info.SectorSize != 0) sbSize++;
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ErrorNumber errno = imagePlugin.ReadSectors(partition.Start + sbAddr, sbSize, out byte[] sector);
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if(errno != ErrorNumber.NoError) return;
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if(sector.Length < Marshal.SizeOf<Superblock>()) return;
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Superblock reiserSb = Marshal.ByteArrayToStructureLittleEndian<Superblock>(sector);
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if(!_magic.SequenceEqual(reiserSb.magic)) return;
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var sb = new StringBuilder();
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sb.AppendLine(Localization.Reiser_4_filesystem);
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sb.AppendFormat(Localization._0_bytes_per_block, reiserSb.blocksize).AppendLine();
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sb.AppendFormat(Localization.Volume_disk_format_0, reiserSb.diskformat).AppendLine();
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sb.AppendFormat(Localization.Volume_UUID_0, reiserSb.uuid).AppendLine();
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sb.AppendFormat(Localization.Volume_name_0, StringHandlers.CToString(reiserSb.label, encoding)).AppendLine();
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information = sb.ToString();
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metadata = new FileSystem
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{
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Type = FS_TYPE,
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ClusterSize = reiserSb.blocksize,
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Clusters = (partition.End - partition.Start) * imagePlugin.Info.SectorSize / reiserSb.blocksize,
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VolumeName = StringHandlers.CToString(reiserSb.label, encoding),
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VolumeSerial = reiserSb.uuid.ToString()
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};
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}
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#endregion
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} |