mirror of
https://github.com/aaru-dps/Aaru.Server.git
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261 lines
9.9 KiB
C#
261 lines
9.9 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : NILFS2.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 NILFS2 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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class NILFS2 : Filesystem
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{
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enum NILFS2_State : ushort
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{
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Valid = 0x0001,
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Error = 0x0002,
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Resize = 0x0004
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct NILFS2_Superblock
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{
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public uint rev_level;
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public ushort minor_rev_level;
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public ushort magic;
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public ushort bytes;
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public ushort flags;
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public uint crc_seed;
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public uint sum;
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public uint log_block_size;
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public ulong nsegments;
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public ulong dev_size;
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public ulong first_data_block;
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public uint blocks_per_segment;
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public uint r_segments_percentage;
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public ulong last_cno;
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public ulong last_pseg;
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public ulong last_seq;
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public ulong free_blocks_count;
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public ulong ctime;
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public ulong mtime;
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public ulong wtime;
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public ushort mnt_count;
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public ushort max_mnt_count;
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public NILFS2_State state;
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public ushort errors;
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public ulong lastcheck;
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public uint checkinterval;
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public uint creator_os;
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public ushort def_resuid;
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public ushort def_resgid;
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public uint first_ino;
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public ushort inode_size;
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public ushort dat_entry_size;
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public ushort checkpoint_size;
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public ushort segment_usage_size;
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public Guid uuid;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 80)]
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public byte[] volume_name;
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public uint c_interval;
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public uint c_block_max;
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public ulong feature_compat;
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public ulong feature_compat_ro;
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public ulong feature_incompat;
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}
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const ushort NILFS2_Magic = 0x3434;
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const uint NILFS2_SuperOffset = 1024;
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public NILFS2()
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{
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Name = "NILFS2 Plugin";
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PluginUUID = new Guid("35224226-C5CC-48B5-8FFD-3781E91E86B6");
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}
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public NILFS2(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
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{
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Name = "NILFS2 Plugin";
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PluginUUID = new Guid("35224226-C5CC-48B5-8FFD-3781E91E86B6");
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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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uint sbAddr = NILFS2_SuperOffset / imagePlugin.GetSectorSize();
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if(sbAddr == 0)
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sbAddr = 1;
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NILFS2_Superblock nilfsSb = new NILFS2_Superblock();
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uint sbSize = (uint)(Marshal.SizeOf(nilfsSb) / imagePlugin.GetSectorSize());
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if(Marshal.SizeOf(nilfsSb) % imagePlugin.GetSectorSize() != 0)
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sbSize++;
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byte[] sector = imagePlugin.ReadSectors(partitionStart + sbAddr, sbSize);
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if(sector.Length < Marshal.SizeOf(nilfsSb))
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return false;
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IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(nilfsSb));
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Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(nilfsSb));
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nilfsSb = (NILFS2_Superblock)Marshal.PtrToStructure(sbPtr, typeof(NILFS2_Superblock));
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Marshal.FreeHGlobal(sbPtr);
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return nilfsSb.magic == NILFS2_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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uint sbAddr = NILFS2_SuperOffset / imagePlugin.GetSectorSize();
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if(sbAddr == 0)
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sbAddr = 1;
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NILFS2_Superblock nilfsSb = new NILFS2_Superblock();
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uint sbSize = (uint)(Marshal.SizeOf(nilfsSb) / imagePlugin.GetSectorSize());
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if(Marshal.SizeOf(nilfsSb) % imagePlugin.GetSectorSize() != 0)
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sbSize++;
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byte[] sector = imagePlugin.ReadSectors(partitionStart + sbAddr, sbSize);
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if(sector.Length < Marshal.SizeOf(nilfsSb))
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return;
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IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(nilfsSb));
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Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(nilfsSb));
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nilfsSb = (NILFS2_Superblock)Marshal.PtrToStructure(sbPtr, typeof(NILFS2_Superblock));
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Marshal.FreeHGlobal(sbPtr);
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if(nilfsSb.magic != NILFS2_Magic)
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return;
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StringBuilder sb = new StringBuilder();
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sb.AppendLine("NILFS2 filesystem");
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sb.AppendFormat("Version {0}.{1}", nilfsSb.rev_level, nilfsSb.minor_rev_level).AppendLine();
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sb.AppendFormat("{0} bytes per block", 1 << (int)(nilfsSb.log_block_size + 10)).AppendLine();
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sb.AppendFormat("{0} bytes in volume", nilfsSb.dev_size).AppendLine();
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sb.AppendFormat("{0} blocks per segment", nilfsSb.blocks_per_segment).AppendLine();
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sb.AppendFormat("{0} segments", nilfsSb.nsegments).AppendLine();
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if(nilfsSb.creator_os == 0)
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sb.AppendLine("Filesystem created on Linux");
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else
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sb.AppendFormat("Creator OS code: {0}", nilfsSb.creator_os).AppendLine();
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sb.AppendFormat("{0} bytes per inode", nilfsSb.inode_size).AppendLine();
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sb.AppendFormat("Volume UUID: {0}", nilfsSb.uuid).AppendLine();
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sb.AppendFormat("Volume name: {0}", Encoding.ASCII.GetString(nilfsSb.volume_name)).AppendLine();
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sb.AppendFormat("Volume created on {0}", DateHandlers.UNIXUnsignedToDateTime(nilfsSb.ctime)).AppendLine();
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sb.AppendFormat("Volume last mounted on {0}", DateHandlers.UNIXUnsignedToDateTime(nilfsSb.mtime)).AppendLine();
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sb.AppendFormat("Volume last written on {0}", DateHandlers.UNIXUnsignedToDateTime(nilfsSb.wtime)).AppendLine();
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information = sb.ToString();
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xmlFSType = new Schemas.FileSystemType();
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xmlFSType.Type = "NILFS2 filesystem";
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if(nilfsSb.creator_os == 0)
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xmlFSType.SystemIdentifier = "Linux";
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xmlFSType.ClusterSize = 1 << (int)(nilfsSb.log_block_size + 10);
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xmlFSType.Clusters = (long)nilfsSb.dev_size / xmlFSType.ClusterSize;
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xmlFSType.VolumeName = Encoding.Unicode.GetString(nilfsSb.volume_name);
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xmlFSType.VolumeSerial = nilfsSb.uuid.ToString();
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xmlFSType.CreationDate = DateHandlers.UNIXUnsignedToDateTime(nilfsSb.ctime);
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xmlFSType.CreationDateSpecified = true;
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xmlFSType.ModificationDate = DateHandlers.UNIXUnsignedToDateTime(nilfsSb.wtime);
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xmlFSType.ModificationDateSpecified = true;
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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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} |