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https://github.com/aaru-dps/Aaru.git
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120 lines
4.4 KiB
C#
120 lines
4.4 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 : Xia 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 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 © 2011-2025 Natalia Portillo
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// ****************************************************************************/
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using System.Diagnostics.CodeAnalysis;
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using System.Runtime.InteropServices;
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namespace Aaru.Filesystems;
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// Information from the Linux kernel
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/// <inheritdoc />
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/// <summary>Implements detection for the Xia filesystem</summary>
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[SuppressMessage("ReSharper", "UnusedMember.Local")]
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[SuppressMessage("ReSharper", "UnusedType.Local")]
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public sealed partial class Xia
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{
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#region Nested type: DirectoryEntry
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/// <summary>Xia directory entry</summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct DirectoryEntry
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{
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public readonly uint d_ino;
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public readonly ushort d_rec_len;
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public readonly byte d_name_len;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = XIAFS_NAME_LEN + 1)]
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public readonly byte[] d_name;
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}
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#endregion
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#region Nested type: Inode
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/// <summary>Xia inode</summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct Inode
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{
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public readonly ushort i_mode;
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public readonly ushort i_nlinks;
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public readonly ushort i_uid;
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public readonly ushort i_gid;
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public readonly uint i_size;
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public readonly uint i_ctime;
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public readonly uint i_atime;
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public readonly uint i_mtime;
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = XIAFS_NUM_BLOCK_POINTERS)]
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public readonly uint[] i_zone;
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}
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#endregion
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#region Nested type: SuperBlock
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/// <summary>Xia superblock</summary>
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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readonly struct SuperBlock
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{
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/// <summary>1st sector reserved for boot</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 512)]
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public readonly byte[] s_boot_segment;
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/// <summary>the name says it</summary>
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public readonly uint s_zone_size;
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/// <summary>volume size, zone aligned</summary>
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public readonly uint s_nzones;
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/// <summary># of inodes</summary>
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public readonly uint s_ninodes;
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/// <summary># of data zones</summary>
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public readonly uint s_ndatazones;
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/// <summary># of imap zones</summary>
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public readonly uint s_imap_zones;
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/// <summary># of zmap zones</summary>
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public readonly uint s_zmap_zones;
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/// <summary>first data zone</summary>
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public readonly uint s_firstdatazone;
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/// <summary>z size = 1KB << z shift</summary>
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public readonly uint s_zone_shift;
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/// <summary>max size of a single file</summary>
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public readonly uint s_max_size;
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/// <summary>reserved</summary>
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public readonly uint s_reserved0;
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/// <summary>reserved</summary>
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public readonly uint s_reserved1;
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/// <summary>reserved</summary>
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public readonly uint s_reserved2;
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/// <summary>reserved</summary>
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public readonly uint s_reserved3;
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/// <summary>first kernel zone</summary>
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public readonly uint s_firstkernzone;
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/// <summary>kernel size in zones</summary>
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public readonly uint s_kernzones;
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/// <summary>magic number for xiafs</summary>
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public readonly uint s_magic;
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}
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#endregion
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} |