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