mirror of
https://github.com/aaru-dps/Aaru.git
synced 2026-07-08 18:16:24 +00:00
529 lines
17 KiB
C#
529 lines
17 KiB
C#
// /***************************************************************************
|
|
// Aaru Data Preservation Suite
|
|
// ----------------------------------------------------------------------------
|
|
//
|
|
// Filename : Structs.cs
|
|
// Author(s) : Natalia Portillo <claunia@claunia.com>
|
|
//
|
|
// Component : Squash file system 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 along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
//
|
|
// ----------------------------------------------------------------------------
|
|
// Copyright © 2011-2026 Natalia Portillo
|
|
// ****************************************************************************/
|
|
|
|
using System.Runtime.InteropServices;
|
|
using Aaru.CommonTypes.Attributes;
|
|
|
|
namespace Aaru.Filesystems;
|
|
|
|
/// <inheritdoc />
|
|
public sealed partial class Squash
|
|
{
|
|
#region Nested type: SuperBlock
|
|
|
|
/// <summary>Squashfs superblock</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct SuperBlock
|
|
{
|
|
/// <summary>Magic number (0x73717368)</summary>
|
|
public uint magic;
|
|
/// <summary>Number of inodes in the filesystem</summary>
|
|
public uint inodes;
|
|
/// <summary>Filesystem creation time (Unix timestamp)</summary>
|
|
public uint mkfs_time;
|
|
/// <summary>Block size in bytes</summary>
|
|
public uint block_size;
|
|
/// <summary>Number of fragments</summary>
|
|
public uint fragments;
|
|
/// <summary>Compression algorithm used</summary>
|
|
public ushort compression;
|
|
/// <summary>Log2 of block size</summary>
|
|
public ushort block_log;
|
|
/// <summary>Filesystem flags</summary>
|
|
public ushort flags;
|
|
/// <summary>Number of uid/gid entries</summary>
|
|
public ushort no_ids;
|
|
/// <summary>Major version number</summary>
|
|
public ushort s_major;
|
|
/// <summary>Minor version number</summary>
|
|
public ushort s_minor;
|
|
/// <summary>Reference to the root inode</summary>
|
|
public ulong root_inode;
|
|
/// <summary>Total bytes used by the filesystem</summary>
|
|
public ulong bytes_used;
|
|
/// <summary>Offset to id table</summary>
|
|
public ulong id_table_start;
|
|
/// <summary>Offset to xattr id table</summary>
|
|
public ulong xattr_id_table_start;
|
|
/// <summary>Offset to inode table</summary>
|
|
public ulong inode_table_start;
|
|
/// <summary>Offset to directory table</summary>
|
|
public ulong directory_table_start;
|
|
/// <summary>Offset to fragment table</summary>
|
|
public ulong fragment_table_start;
|
|
/// <summary>Offset to lookup table</summary>
|
|
public ulong lookup_table_start;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: BaseInode
|
|
|
|
/// <summary>Base inode structure common to all inode types</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct BaseInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: IpcInode
|
|
|
|
/// <summary>IPC (FIFO/socket) inode structure</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct IpcInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Number of hard links</summary>
|
|
public uint nlink;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: ExtendedIpcInode
|
|
|
|
/// <summary>Extended IPC (FIFO/socket) inode structure with xattr support</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct ExtendedIpcInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Number of hard links</summary>
|
|
public uint nlink;
|
|
/// <summary>Extended attributes index</summary>
|
|
public uint xattr;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: DevInode
|
|
|
|
/// <summary>Device inode structure</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct DevInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Number of hard links</summary>
|
|
public uint nlink;
|
|
/// <summary>Device number (major/minor)</summary>
|
|
public uint rdev;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: ExtendedDevInode
|
|
|
|
/// <summary>Extended device inode structure with xattr support</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct ExtendedDevInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Number of hard links</summary>
|
|
public uint nlink;
|
|
/// <summary>Device number (major/minor)</summary>
|
|
public uint rdev;
|
|
/// <summary>Extended attributes index</summary>
|
|
public uint xattr;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: SymlinkInode
|
|
|
|
/// <summary>Symbolic link inode structure</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct SymlinkInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Number of hard links</summary>
|
|
public uint nlink;
|
|
/// <summary>Length of the symbolic link target</summary>
|
|
public uint symlink_size;
|
|
|
|
// Followed by symlink target (char symlink[])
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: RegInode
|
|
|
|
/// <summary>Regular file inode structure</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct RegInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Start block of the file data</summary>
|
|
public uint start_block;
|
|
/// <summary>Fragment index (or SQUASHFS_INVALID_FRAG if no fragment)</summary>
|
|
public uint fragment;
|
|
/// <summary>Offset within the fragment</summary>
|
|
public uint offset;
|
|
/// <summary>File size in bytes</summary>
|
|
public uint file_size;
|
|
|
|
// Followed by block list (ushort block_list[])
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: ExtendedRegInode
|
|
|
|
/// <summary>Extended regular file inode structure for large files with xattr support</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct ExtendedRegInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Start block of the file data</summary>
|
|
public ulong start_block;
|
|
/// <summary>File size in bytes</summary>
|
|
public ulong file_size;
|
|
/// <summary>Sparse file indicator</summary>
|
|
public ulong sparse;
|
|
/// <summary>Number of hard links</summary>
|
|
public uint nlink;
|
|
/// <summary>Fragment index (or SQUASHFS_INVALID_FRAG if no fragment)</summary>
|
|
public uint fragment;
|
|
/// <summary>Offset within the fragment</summary>
|
|
public uint offset;
|
|
/// <summary>Extended attributes index</summary>
|
|
public uint xattr;
|
|
|
|
// Followed by block list (ushort block_list[])
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: DirInode
|
|
|
|
/// <summary>Directory inode structure</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct DirInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Start block of the directory entries</summary>
|
|
public uint start_block;
|
|
/// <summary>Number of hard links</summary>
|
|
public uint nlink;
|
|
/// <summary>Directory size</summary>
|
|
public ushort file_size;
|
|
/// <summary>Offset within the block</summary>
|
|
public ushort offset;
|
|
/// <summary>Parent inode number</summary>
|
|
public uint parent_inode;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: ExtendedDirInode
|
|
|
|
/// <summary>Extended directory inode structure with index and xattr support</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct ExtendedDirInode
|
|
{
|
|
/// <summary>Inode type</summary>
|
|
public ushort inode_type;
|
|
/// <summary>File mode (permissions)</summary>
|
|
public ushort mode;
|
|
/// <summary>User ID index</summary>
|
|
public ushort uid;
|
|
/// <summary>Group ID index</summary>
|
|
public ushort guid;
|
|
/// <summary>Modification time (Unix timestamp)</summary>
|
|
public uint mtime;
|
|
/// <summary>Inode number</summary>
|
|
public uint inode_number;
|
|
/// <summary>Number of hard links</summary>
|
|
public uint nlink;
|
|
/// <summary>Directory size</summary>
|
|
public uint file_size;
|
|
/// <summary>Start block of the directory entries</summary>
|
|
public uint start_block;
|
|
/// <summary>Parent inode number</summary>
|
|
public uint parent_inode;
|
|
/// <summary>Number of directory index entries</summary>
|
|
public ushort i_count;
|
|
/// <summary>Offset within the block</summary>
|
|
public ushort offset;
|
|
/// <summary>Extended attributes index</summary>
|
|
public uint xattr;
|
|
|
|
// Followed by directory index entries (DirIndex index[])
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: DirIndex
|
|
|
|
/// <summary>Directory index entry for fast directory lookup</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct DirIndex
|
|
{
|
|
/// <summary>Index within the directory</summary>
|
|
public uint index;
|
|
/// <summary>Start block</summary>
|
|
public uint start_block;
|
|
/// <summary>Size of the name</summary>
|
|
public uint size;
|
|
|
|
// Followed by name (char name[])
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: DirEntry
|
|
|
|
/// <summary>Directory entry structure</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct DirEntry
|
|
{
|
|
/// <summary>Offset to the inode</summary>
|
|
public ushort offset;
|
|
/// <summary>Inode number offset from header</summary>
|
|
public short inode_number;
|
|
/// <summary>Entry type</summary>
|
|
public ushort type;
|
|
/// <summary>Name length minus 1</summary>
|
|
public ushort size;
|
|
|
|
// Followed by name (char name[])
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: DirHeader
|
|
|
|
/// <summary>Directory header structure</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct DirHeader
|
|
{
|
|
/// <summary>Number of entries minus 1</summary>
|
|
public uint count;
|
|
/// <summary>Start block containing the inodes</summary>
|
|
public uint start_block;
|
|
/// <summary>Base inode number</summary>
|
|
public uint inode_number;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: FragmentEntry
|
|
|
|
/// <summary>Fragment table entry</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct FragmentEntry
|
|
{
|
|
/// <summary>Start block of the fragment</summary>
|
|
public ulong start_block;
|
|
/// <summary>Size of the fragment (with compression flag)</summary>
|
|
public uint size;
|
|
/// <summary>Unused padding</summary>
|
|
public uint unused;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: XattrEntry
|
|
|
|
/// <summary>Extended attribute entry</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct XattrEntry
|
|
{
|
|
/// <summary>Attribute type (namespace)</summary>
|
|
public ushort type;
|
|
/// <summary>Attribute name size</summary>
|
|
public ushort size;
|
|
|
|
// Followed by attribute name (char data[])
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: XattrVal
|
|
|
|
/// <summary>Extended attribute value</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct XattrVal
|
|
{
|
|
/// <summary>Value size</summary>
|
|
public uint vsize;
|
|
|
|
// Followed by value (char value[])
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: XattrId
|
|
|
|
/// <summary>Extended attribute ID entry</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct XattrId
|
|
{
|
|
/// <summary>Reference to the xattr data</summary>
|
|
public ulong xattr;
|
|
/// <summary>Number of xattr entries</summary>
|
|
public uint count;
|
|
/// <summary>Total size of the xattr data</summary>
|
|
public uint size;
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Nested type: XattrIdTable
|
|
|
|
/// <summary>Extended attribute ID table header</summary>
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
[SwapEndian]
|
|
partial struct XattrIdTable
|
|
{
|
|
/// <summary>Start of the xattr table</summary>
|
|
public ulong xattr_table_start;
|
|
/// <summary>Number of xattr IDs</summary>
|
|
public uint xattr_ids;
|
|
/// <summary>Unused padding</summary>
|
|
public uint unused;
|
|
}
|
|
|
|
#endregion
|
|
} |