// /*************************************************************************** // The Disc Image Chef // ---------------------------------------------------------------------------- // // Filename : F2FS.cs // Author(s) : Natalia Portillo // // Component : F2FS filesystem plugin. // // --[ Description ] ---------------------------------------------------------- // // Identifies the F2FS 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 © 2011-2018 Natalia Portillo // ****************************************************************************/ using System; using System.Collections.Generic; using System.Diagnostics.CodeAnalysis; using System.Runtime.InteropServices; using System.Text; using DiscImageChef.CommonTypes; using DiscImageChef.DiscImages; using Schemas; namespace DiscImageChef.Filesystems { public class F2FS : Filesystem { const uint F2FS_MAGIC = 0xF2F52010; const uint F2FS_SUPER_OFFSET = 1024; const uint F2FS_MIN_SECTOR = 512; const uint F2FS_MAX_SECTOR = 4096; const uint F2FS_BLOCK_SIZE = 4096; public F2FS() { Name = "F2FS Plugin"; PluginUuid = new Guid("82B0920F-5F0D-4063-9F57-ADE0AE02ECE5"); CurrentEncoding = Encoding.Unicode; } public F2FS(Encoding encoding) { Name = "F2FS Plugin"; PluginUuid = new Guid("82B0920F-5F0D-4063-9F57-ADE0AE02ECE5"); CurrentEncoding = Encoding.Unicode; } public F2FS(ImagePlugin imagePlugin, Partition partition, Encoding encoding) { Name = "F2FS Plugin"; PluginUuid = new Guid("82B0920F-5F0D-4063-9F57-ADE0AE02ECE5"); CurrentEncoding = Encoding.Unicode; } public override bool Identify(ImagePlugin imagePlugin, Partition partition) { if(imagePlugin.GetSectorSize() < F2FS_MIN_SECTOR || imagePlugin.GetSectorSize() > F2FS_MAX_SECTOR) return false; uint sbAddr = F2FS_SUPER_OFFSET / imagePlugin.GetSectorSize(); if(sbAddr == 0) sbAddr = 1; F2FS_Superblock f2fsSb = new F2FS_Superblock(); uint sbSize = (uint)(Marshal.SizeOf(f2fsSb) / imagePlugin.GetSectorSize()); if(Marshal.SizeOf(f2fsSb) % imagePlugin.GetSectorSize() != 0) sbSize++; if(partition.Start + sbAddr >= partition.End) return false; byte[] sector = imagePlugin.ReadSectors(partition.Start + sbAddr, sbSize); if(sector.Length < Marshal.SizeOf(f2fsSb)) return false; IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(f2fsSb)); Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(f2fsSb)); f2fsSb = (F2FS_Superblock)Marshal.PtrToStructure(sbPtr, typeof(F2FS_Superblock)); Marshal.FreeHGlobal(sbPtr); return f2fsSb.magic == F2FS_MAGIC; } public override void GetInformation(ImagePlugin imagePlugin, Partition partition, out string information) { information = ""; if(imagePlugin.GetSectorSize() < F2FS_MIN_SECTOR || imagePlugin.GetSectorSize() > F2FS_MAX_SECTOR) return; uint sbAddr = F2FS_SUPER_OFFSET / imagePlugin.GetSectorSize(); if(sbAddr == 0) sbAddr = 1; F2FS_Superblock f2fsSb = new F2FS_Superblock(); uint sbSize = (uint)(Marshal.SizeOf(f2fsSb) / imagePlugin.GetSectorSize()); if(Marshal.SizeOf(f2fsSb) % imagePlugin.GetSectorSize() != 0) sbSize++; byte[] sector = imagePlugin.ReadSectors(partition.Start + sbAddr, sbSize); if(sector.Length < Marshal.SizeOf(f2fsSb)) return; IntPtr sbPtr = Marshal.AllocHGlobal(Marshal.SizeOf(f2fsSb)); Marshal.Copy(sector, 0, sbPtr, Marshal.SizeOf(f2fsSb)); f2fsSb = (F2FS_Superblock)Marshal.PtrToStructure(sbPtr, typeof(F2FS_Superblock)); Marshal.FreeHGlobal(sbPtr); if(f2fsSb.magic != F2FS_MAGIC) return; StringBuilder sb = new StringBuilder(); sb.AppendLine("F2FS filesystem"); sb.AppendFormat("Version {0}.{1}", f2fsSb.major_ver, f2fsSb.minor_ver).AppendLine(); sb.AppendFormat("{0} bytes per sector", 1 << (int)f2fsSb.log_sectorsize).AppendLine(); sb.AppendFormat("{0} sectors ({1} bytes) per block", 1 << (int)f2fsSb.log_sectors_per_block, 1 << (int)f2fsSb.log_blocksize).AppendLine(); sb.AppendFormat("{0} blocks per segment", f2fsSb.log_blocks_per_seg).AppendLine(); sb.AppendFormat("{0} blocks in volume", f2fsSb.block_count).AppendLine(); sb.AppendFormat("{0} segments per section", f2fsSb.segs_per_sec).AppendLine(); sb.AppendFormat("{0} sections per zone", f2fsSb.secs_per_zone).AppendLine(); sb.AppendFormat("{0} sections", f2fsSb.section_count).AppendLine(); sb.AppendFormat("{0} segments", f2fsSb.segment_count).AppendLine(); sb.AppendFormat("Root directory resides on inode {0}", f2fsSb.root_ino).AppendLine(); sb.AppendFormat("Volume UUID: {0}", f2fsSb.uuid).AppendLine(); sb.AppendFormat("Volume name: {0}", StringHandlers.CToString(f2fsSb.volume_name, Encoding.Unicode, true)) .AppendLine(); sb.AppendFormat("Volume last mounted on kernel version: {0}", StringHandlers.CToString(f2fsSb.version)) .AppendLine(); sb.AppendFormat("Volume created on kernel version: {0}", StringHandlers.CToString(f2fsSb.init_version)) .AppendLine(); information = sb.ToString(); XmlFsType = new FileSystemType { Type = "F2FS filesystem", SystemIdentifier = Encoding.ASCII.GetString(f2fsSb.version), Clusters = (long)f2fsSb.block_count, ClusterSize = 1 << (int)f2fsSb.log_blocksize, DataPreparerIdentifier = Encoding.ASCII.GetString(f2fsSb.init_version), VolumeName = StringHandlers.CToString(f2fsSb.volume_name, Encoding.Unicode, true), VolumeSerial = f2fsSb.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; } [StructLayout(LayoutKind.Sequential, Pack = 1)] [SuppressMessage("ReSharper", "InconsistentNaming")] struct F2FS_Superblock { public uint magic; public ushort major_ver; public ushort minor_ver; public uint log_sectorsize; public uint log_sectors_per_block; public uint log_blocksize; public uint log_blocks_per_seg; public uint segs_per_sec; public uint secs_per_zone; public uint checksum_offset; public ulong block_count; public uint section_count; public uint segment_count; public uint segment_count_ckpt; public uint segment_count_sit; public uint segment_count_nat; public uint segment_count_ssa; public uint segment_count_main; public uint segment0_blkaddr; public uint cp_blkaddr; public uint sit_blkaddr; public uint nat_blkaddr; public uint ssa_blkaddr; public uint main_blkaddr; public uint root_ino; public uint node_ino; public uint meta_ino; public Guid uuid; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 1024)] public byte[] volume_name; public uint extension_count; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)] public byte[] extension_list1; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)] public byte[] extension_list2; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)] public byte[] extension_list3; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)] public byte[] extension_list4; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)] public byte[] extension_list5; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)] public byte[] extension_list6; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)] public byte[] extension_list7; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64)] public byte[] extension_list8; public uint cp_payload; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)] public byte[] version; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)] public byte[] init_version; public uint feature; public byte encryption_level; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] encrypt_pw_salt; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 871)] public byte[] reserved; } } }