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https://github.com/aaru-dps/Aaru.git
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253 lines
9.2 KiB
C#
253 lines
9.2 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : XFS.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 XFS 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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namespace DiscImageChef.Filesystems
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{
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public class XFS : Filesystem
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{
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct XFS_Superblock
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{
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public uint magicnum;
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public uint blocksize;
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public ulong dblocks;
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public ulong rblocks;
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public ulong rextents;
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public Guid uuid;
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public ulong logstat;
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public ulong rootino;
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public ulong rbmino;
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public ulong rsumino;
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public uint rextsize;
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public uint agblocks;
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public uint agcount;
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public uint rbmblocks;
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public uint logblocks;
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public ushort version;
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public ushort sectsize;
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public ushort inodesize;
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public ushort inopblock;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
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public byte[] fname;
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public byte blocklog;
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public byte sectlog;
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public byte inodelog;
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public byte inopblog;
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public byte agblklog;
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public byte rextslog;
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public byte inprogress;
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public byte imax_pct;
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public ulong icount;
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public ulong ifree;
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public ulong fdblocks;
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public ulong frextents;
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public ulong uquotino;
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public ulong gquotino;
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public ushort qflags;
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public byte flags;
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public byte shared_vn;
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public ulong inoalignmt;
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public ulong unit;
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public ulong width;
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public byte dirblklog;
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public byte logsectlog;
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public ushort logsectsize;
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public uint logsunit;
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public uint features2;
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public uint bad_features2;
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public uint features_compat;
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public uint features_ro_compat;
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public uint features_incompat;
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public uint features_log_incompat;
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// This field is little-endian while rest of superblock is big-endian
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public uint crc;
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public uint spino_align;
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public ulong pquotino;
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public ulong lsn;
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public Guid meta_uuid;
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}
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const uint XFS_Magic = 0x58465342;
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public XFS()
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{
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Name = "XFS Filesystem Plugin";
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PluginUUID = new Guid("1D8CD8B8-27E6-410F-9973-D16409225FBA");
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CurrentEncoding = Encoding.GetEncoding("iso-8859-15");
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}
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public XFS(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd, Encoding encoding)
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{
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Name = "XFS Filesystem Plugin";
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PluginUUID = new Guid("1D8CD8B8-27E6-410F-9973-D16409225FBA");
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if(encoding == null)
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CurrentEncoding = Encoding.GetEncoding("iso-8859-15");
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}
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public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
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{
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if(imagePlugin.GetSectorSize() < 512)
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return false;
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XFS_Superblock xfsSb = new XFS_Superblock();
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uint sbSize = (uint)(Marshal.SizeOf(xfsSb) / imagePlugin.GetSectorSize());
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if(Marshal.SizeOf(xfsSb) % imagePlugin.GetSectorSize() != 0)
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sbSize++;
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byte[] sector = imagePlugin.ReadSectors(partitionStart, sbSize);
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if(sector.Length < Marshal.SizeOf(xfsSb))
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return false;
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xfsSb = BigEndianMarshal.ByteArrayToStructureBigEndian<XFS_Superblock>(sector);
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return xfsSb.magicnum == XFS_Magic;
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}
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public override void GetInformation(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd, out string information)
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{
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information = "";
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if(imagePlugin.GetSectorSize() < 512)
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return;
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XFS_Superblock xfsSb = new XFS_Superblock();
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uint sbSize = (uint)(Marshal.SizeOf(xfsSb) / imagePlugin.GetSectorSize());
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if(Marshal.SizeOf(xfsSb) % imagePlugin.GetSectorSize() != 0)
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sbSize++;
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byte[] sector = imagePlugin.ReadSectors(partitionStart, sbSize);
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if(sector.Length < Marshal.SizeOf(xfsSb))
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return;
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xfsSb = BigEndianMarshal.ByteArrayToStructureBigEndian<XFS_Superblock>(sector);
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if(xfsSb.magicnum != XFS_Magic)
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return;
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StringBuilder sb = new StringBuilder();
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sb.AppendLine("XFS filesystem");
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sb.AppendFormat("Filesystem version {0}", xfsSb.version & 0xF).AppendLine();
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sb.AppendFormat("{0} bytes per sector", xfsSb.sectsize).AppendLine();
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sb.AppendFormat("{0} bytes per block", xfsSb.blocksize).AppendLine();
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sb.AppendFormat("{0} bytes per inode", xfsSb.inodesize).AppendLine();
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sb.AppendFormat("{0} data blocks in volume, {1} free", xfsSb.dblocks, xfsSb.fdblocks).AppendLine();
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sb.AppendFormat("{0} blocks per allocation group", xfsSb.agblocks).AppendLine();
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sb.AppendFormat("{0} allocation groups in volume", xfsSb.agcount).AppendLine();
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sb.AppendFormat("{0} inodes in volume, {1} free", xfsSb.icount, xfsSb.ifree).AppendLine();
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if(xfsSb.inprogress > 0)
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sb.AppendLine("fsck in progress");
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sb.AppendFormat("Volume name: {0}", CurrentEncoding.GetString(xfsSb.fname)).AppendLine();
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sb.AppendFormat("Volume UUID: {0}", xfsSb.uuid).AppendLine();
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information = sb.ToString();
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xmlFSType = new Schemas.FileSystemType();
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xmlFSType.Type = "XFS filesystem";
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xmlFSType.ClusterSize = (int)xfsSb.blocksize;
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xmlFSType.Clusters = (long)xfsSb.dblocks;
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xmlFSType.FreeClusters = (long)xfsSb.fdblocks;
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xmlFSType.FreeClustersSpecified = true;
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xmlFSType.Files = (long)(xfsSb.icount - xfsSb.ifree);
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xmlFSType.FilesSpecified = true;
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xmlFSType.Dirty |= xfsSb.inprogress > 0;
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xmlFSType.VolumeName = CurrentEncoding.GetString(xfsSb.fname);
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xmlFSType.VolumeSerial = xfsSb.uuid.ToString();
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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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} |