mirror of
https://github.com/aaru-dps/Aaru.git
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268 lines
11 KiB
C#
268 lines
11 KiB
C#
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// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : F2FS.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 F2FS 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 © 2011-2016 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 F2FS : Filesystem
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{
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct F2FS_Superblock
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{
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public uint magic;
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public ushort major_ver;
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public ushort minor_ver;
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public uint log_sectorsize;
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public uint log_sectors_per_block;
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public uint log_blocksize;
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public uint log_blocks_per_seg;
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public uint segs_per_sec;
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public uint secs_per_zone;
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public uint checksum_offset;
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public ulong block_count;
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public uint section_count;
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public uint segment_count;
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public uint segment_count_ckpt;
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public uint segment_count_sit;
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public uint segment_count_nat;
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public uint segment_count_ssa;
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public uint segment_count_main;
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public uint segment0_blkaddr;
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public uint cp_blkaddr;
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public uint sit_blkaddr;
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public uint nat_blkaddr;
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public uint ssa_blkaddr;
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public uint main_blkaddr;
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public uint root_ino;
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public uint node_ino;
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public uint meta_ino;
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public Guid uuid;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 1024)]
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public byte[] volume_name;
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public uint extension_count;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] extension_list1;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] extension_list2;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] extension_list3;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] extension_list4;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] extension_list5;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] extension_list6;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] extension_list7;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)]
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public byte[] extension_list8;
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public uint cp_payload;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
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public byte[] version;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)]
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public byte[] init_version;
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public uint feature;
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public byte encryption_level;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
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public byte[] encrypt_pw_salt;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 871)]
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public byte[] reserved;
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}
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const uint F2FS_Magic = 0xF2F52010;
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const uint F2FS_SuperOffset = 1024;
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const uint F2FS_MinSector = 512;
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const uint F2FS_MaxSector = 4096;
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const uint F2FS_BlockSize = 4096;
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public F2FS()
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{
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Name = "F2FS Plugin";
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PluginUUID = new Guid("82B0920F-5F0D-4063-9F57-ADE0AE02ECE5");
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}
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public F2FS(ImagePlugins.ImagePlugin imagePlugin, ulong partitionStart, ulong partitionEnd)
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{
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Name = "F2FS Plugin";
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PluginUUID = new Guid("82B0920F-5F0D-4063-9F57-ADE0AE02ECE5");
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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() < F2FS_MinSector || imagePlugin.GetSectorSize() > F2FS_MaxSector)
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return false;
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uint sbAddr = F2FS_SuperOffset / imagePlugin.GetSectorSize();
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if(sbAddr == 0)
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sbAddr = 1;
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F2FS_Superblock f2fsSb = new F2FS_Superblock();
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uint sbSize = (uint)(Marshal.SizeOf(f2fsSb) / imagePlugin.GetSectorSize());
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if(Marshal.SizeOf(f2fsSb) % 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(f2fsSb))
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return false;
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IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(f2fsSb));
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Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(f2fsSb));
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f2fsSb = (F2FS_Superblock)Marshal.PtrToStructure(sbPtr, typeof(F2FS_Superblock));
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Marshal.FreeHGlobal(sbPtr);
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return f2fsSb.magic == F2FS_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() < F2FS_MinSector || imagePlugin.GetSectorSize() > F2FS_MaxSector)
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return;
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uint sbAddr = F2FS_SuperOffset / imagePlugin.GetSectorSize();
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if(sbAddr == 0)
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sbAddr = 1;
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F2FS_Superblock f2fsSb = new F2FS_Superblock();
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uint sbSize = (uint)(Marshal.SizeOf(f2fsSb) / imagePlugin.GetSectorSize());
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if(Marshal.SizeOf(f2fsSb) % 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(f2fsSb))
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return;
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IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(f2fsSb));
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Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(f2fsSb));
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f2fsSb = (F2FS_Superblock)Marshal.PtrToStructure(sbPtr, typeof(F2FS_Superblock));
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Marshal.FreeHGlobal(sbPtr);
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if(f2fsSb.magic != F2FS_Magic)
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return;
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StringBuilder sb = new StringBuilder();
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sb.AppendLine("F2FS filesystem");
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sb.AppendFormat("Version {0}.{1}", f2fsSb.major_ver, f2fsSb.minor_ver).AppendLine();
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sb.AppendFormat("{0} bytes per sector", 1 << (int)f2fsSb.log_sectorsize).AppendLine();
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sb.AppendFormat("{0} sectors ({1} bytes) per block", 1 << (int)f2fsSb.log_sectors_per_block, 1 << (int)f2fsSb.log_blocksize).AppendLine();
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sb.AppendFormat("{0} blocks per segment", f2fsSb.log_blocks_per_seg).AppendLine();
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sb.AppendFormat("{0} blocks in volume", f2fsSb.block_count).AppendLine();
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sb.AppendFormat("{0} segments per section", f2fsSb.segs_per_sec).AppendLine();
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sb.AppendFormat("{0} sections per zone", f2fsSb.secs_per_zone).AppendLine();
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sb.AppendFormat("{0} sections", f2fsSb.section_count).AppendLine();
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sb.AppendFormat("{0} segments", f2fsSb.segment_count).AppendLine();
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sb.AppendFormat("Root directory resides on inode {0}", f2fsSb.root_ino).AppendLine();
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sb.AppendFormat("Volume UUID: {0}", f2fsSb.uuid).AppendLine();
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sb.AppendFormat("Volume name: {0}", Encoding.Unicode.GetString(f2fsSb.volume_name)).AppendLine();
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sb.AppendFormat("Volume last mounted on kernel version: {0}", Encoding.ASCII.GetString(f2fsSb.version)).AppendLine();
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sb.AppendFormat("Volume created on kernel version: {0}", Encoding.ASCII.GetString(f2fsSb.init_version)).AppendLine();
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information = sb.ToString();
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xmlFSType = new Schemas.FileSystemType();
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xmlFSType.Type = "F2FS filesystem";
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xmlFSType.SystemIdentifier = Encoding.ASCII.GetString(f2fsSb.version);
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xmlFSType.Clusters = (long)f2fsSb.block_count;
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xmlFSType.ClusterSize = 1 << (int)f2fsSb.log_blocksize;
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xmlFSType.DataPreparerIdentifier = Encoding.ASCII.GetString(f2fsSb.init_version);
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xmlFSType.VolumeName = Encoding.Unicode.GetString(f2fsSb.volume_name);
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xmlFSType.VolumeSerial = f2fsSb.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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}
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