// /*************************************************************************** // Aaru Data Preservation Suite // ---------------------------------------------------------------------------- // // Filename : Structs.cs // Author(s) : Natalia Portillo // // Component : Locus filesystem plugin // // --[ 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 aint with this library; if not, see . // // ---------------------------------------------------------------------------- // Copyright © 2011-2025 Natalia Portillo // ****************************************************************************/ // Commit count using System.Diagnostics.CodeAnalysis; using System.Runtime.InteropServices; using Aaru.CommonTypes.Attributes; using commitcnt_t = int; // Disk address using daddr_t = int; // Fstore using fstore_t = int; // Global File System number using gfs_t = int; // Inode number using ino_t = int; // Filesystem pack number using pckno_t = short; // Timestamp using time_t = int; // ReSharper disable UnusedMember.Local // ReSharper disable UnusedType.Local namespace Aaru.Filesystems; /// /// Implements detection of the Locus filesystem public sealed partial class Locus { #region Nested type: OldSuperblock [SuppressMessage("ReSharper", "InconsistentNaming")] [SuppressMessage("ReSharper", "BuiltInTypeReferenceStyle")] [StructLayout(LayoutKind.Sequential, Pack = 1)] readonly struct OldSuperblock { public readonly uint s_magic; /* identifies this as a locus filesystem */ /* defined as a constant below */ public readonly gfs_t s_gfs; /* global filesystem number */ public readonly daddr_t s_fsize; /* size in blocks of entire volume */ /* several ints for replicated filsystems */ public readonly commitcnt_t s_lwm; /* all prior commits propagated */ public readonly commitcnt_t s_hwm; /* highest commit propagated */ /* oldest committed version in the list. * llst mod NCMTLST is the offset of commit #llst in the list, * which wraps around from there. */ public readonly commitcnt_t s_llst; public readonly fstore_t s_fstore; /* filesystem storage bit mask; if the filsys is replicated and this is not a primary or backbone copy, this bit mask determines which files are stored */ public readonly time_t s_time; /* last super block update */ public readonly daddr_t s_tfree; /* total free blocks*/ public readonly ino_t s_isize; /* size in blocks of i-list */ public readonly short s_nfree; /* number of addresses in s_free */ public readonly Flags s_flags; /* filsys flags, defined below */ public readonly ino_t s_tinode; /* total free inodes */ public readonly ino_t s_lasti; /* start place for circular search */ public readonly ino_t s_nbehind; /* est # free inodes before s_lasti */ public readonly pckno_t s_gfspack; /* global filesystem pack number */ public readonly short s_ninode; /* number of i-nodes in s_inode */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)] public readonly short[] s_dinfo; /* interleave stuff */ //#define s_m s_dinfo[0] //#define s_skip s_dinfo[0] /* AIX defines */ //#define s_n s_dinfo[1] //#define s_cyl s_dinfo[1] /* AIX defines */ public readonly byte s_flock; /* lock during free list manipulation */ public readonly byte s_ilock; /* lock during i-list manipulation */ public readonly byte s_fmod; /* super block modified flag */ public readonly Version s_version; /* version of the data format in fs. */ /* defined below. */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public readonly byte[] s_fsmnt; /* name of this file system */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public readonly byte[] s_fpack; /* name of this physical volume */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = OLDNICINOD)] public readonly ino_t[] s_inode; /* free i-node list */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = OLDNICFREE)] public readonly daddr_t[] su_free; /* free block list for non-replicated filsys */ public readonly byte s_byteorder; /* byte order of integers */ } #endregion #region Nested type: Superblock [SuppressMessage("ReSharper", "InconsistentNaming")] [SuppressMessage("ReSharper", "BuiltInTypeReferenceStyle")] [StructLayout(LayoutKind.Sequential, Pack = 1)] [SwapEndian] partial struct Superblock { public uint s_magic; /* identifies this as a locus filesystem */ /* defined as a constant below */ public gfs_t s_gfs; /* global filesystem number */ public daddr_t s_fsize; /* size in blocks of entire volume */ /* several ints for replicated filesystems */ public commitcnt_t s_lwm; /* all prior commits propagated */ public commitcnt_t s_hwm; /* highest commit propagated */ /* oldest committed version in the list. * llst mod NCMTLST is the offset of commit #llst in the list, * which wraps around from there. */ public commitcnt_t s_llst; public fstore_t s_fstore; /* filesystem storage bit mask; if the filsys is replicated and this is not a primary or backbone copy, this bit mask determines which files are stored */ public time_t s_time; /* last super block update */ public daddr_t s_tfree; /* total free blocks*/ public ino_t s_isize; /* size in blocks of i-list */ public short s_nfree; /* number of addresses in s_free */ public Flags s_flags; /* filsys flags, defined below */ public ino_t s_tinode; /* total free inodes */ public ino_t s_lasti; /* start place for circular search */ public ino_t s_nbehind; /* est # free inodes before s_lasti */ public pckno_t s_gfspack; /* global filesystem pack number */ public short s_ninode; /* number of i-nodes in s_inode */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)] public short[] s_dinfo; /* interleave stuff */ //#define s_m s_dinfo[0] //#define s_skip s_dinfo[0] /* AIX defines */ //#define s_n s_dinfo[1] //#define s_cyl s_dinfo[1] /* AIX defines */ public byte s_flock; /* lock during free list manipulation */ public byte s_ilock; /* lock during i-list manipulation */ public byte s_fmod; /* super block modified flag */ public Version s_version; /* version of the data format in fs. */ /* defined below. */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)] public byte[] s_fsmnt; /* name of this file system */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] s_fpack; /* name of this physical volume */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = NICINOD)] public ino_t[] s_inode; /* free i-node list */ [MarshalAs(UnmanagedType.ByValArray, SizeConst = NICFREE)] public daddr_t[] su_free; /* free block list for non-replicated filsys */ public byte s_byteorder; /* byte order of integers */ } #endregion }