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Aaru/DiscImageChef.Partitions/SGI.cs

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// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename : SGI.cs
// Author(s) : Natalia Portillo <claunia@claunia.com>
//
// Component : Partitioning scheme plugins.
//
// --[ Description ] ----------------------------------------------------------
//
// Manages SGI DVHs (Disk Volume Headers).
//
// --[ 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 © 2011-2018 Natalia Portillo
// ****************************************************************************/
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.InteropServices;
using DiscImageChef.CommonTypes;
using DiscImageChef.Console;
using DiscImageChef.DiscImages;
#pragma warning disable 169
#pragma warning disable 649
namespace DiscImageChef.Partitions
{
[SuppressMessage("ReSharper", "InconsistentNaming")]
public class SGI : IPartition
{
const int SGI_MAGIC = 0x0BE5A941;
public virtual string Name => "SGI Disk Volume Header";
public virtual Guid Id => new Guid("AEF5AB45-4880-4CE8-8735-F0A402E2E5F2");
public virtual bool GetInformation(IMediaImage imagePlugin, out List<Partition> partitions, ulong sectorOffset)
{
partitions = new List<Partition>();
byte[] sector = imagePlugin.ReadSector(sectorOffset);
if(sector.Length < 512) return false;
SGILabel dvh = BigEndianMarshal.ByteArrayToStructureBigEndian<SGILabel>(sector);
for(int i = 0; i < dvh.volume.Length; i++)
dvh.volume[i] = BigEndianMarshal.SwapStructureMembersEndian(dvh.volume[i]);
for(int i = 0; i < dvh.partitions.Length; i++)
dvh.partitions[i] = BigEndianMarshal.SwapStructureMembersEndian(dvh.partitions[i]);
dvh.device_params = BigEndianMarshal.SwapStructureMembersEndian(dvh.device_params);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.magic = 0x{0:X8} (should be 0x{1:X8})", dvh.magic,
SGI_MAGIC);
if(dvh.magic != SGI_MAGIC) return false;
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.root_part_num = {0}", dvh.root_part_num);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.swap_part_num = {0}", dvh.swap_part_num);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.boot_file = \"{0}\"",
StringHandlers.CToString(dvh.boot_file));
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_skew = {0}", dvh.device_params.dp_skew);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_gap1 = {0}", dvh.device_params.dp_gap1);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_gap2 = {0}", dvh.device_params.dp_gap2);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_spares_cyl = {0}",
dvh.device_params.dp_spares_cyl);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_cyls = {0}", dvh.device_params.dp_cyls);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_shd0 = {0}", dvh.device_params.dp_shd0);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_trks0 = {0}", dvh.device_params.dp_trks0);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_ctq_depth = {0}",
dvh.device_params.dp_ctq_depth);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_cylshi = {0}", dvh.device_params.dp_cylshi);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_secs = {0}", dvh.device_params.dp_secs);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_secbytes = {0}",
dvh.device_params.dp_secbytes);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_interleave = {0}",
dvh.device_params.dp_interleave);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_flags = {0}", dvh.device_params.dp_flags);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_datarate = {0}",
dvh.device_params.dp_datarate);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_nretries = {0}",
dvh.device_params.dp_nretries);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_mspw = {0}", dvh.device_params.dp_mspw);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_xgap1 = {0}", dvh.device_params.dp_xgap1);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_xsync = {0}", dvh.device_params.dp_xsync);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_xrdly = {0}", dvh.device_params.dp_xrdly);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_xgap2 = {0}", dvh.device_params.dp_xgap2);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_xrgate = {0}", dvh.device_params.dp_xrgate);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.device_params.dp_xwcont = {0}", dvh.device_params.dp_xwcont);
ulong counter = 0;
for(int i = 0; i < dvh.partitions.Length; i++)
{
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.partitions[{0}].num_blocks = {1}", i,
dvh.partitions[i].num_blocks);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.partitions[{0}].first_block = {1}", i,
dvh.partitions[i].first_block);
// TODO: Solve big endian marshal with enumerations
dvh.partitions[i].type = (SGIType)Swapping.Swap((uint)dvh.partitions[i].type);
DicConsole.DebugWriteLine("SGIVH plugin", "dvh.partitions[{0}].type = {1}", i, dvh.partitions[i].type);
Partition part = new Partition
{
Start = dvh.partitions[i].first_block * dvh.device_params.dp_secbytes / imagePlugin.Info.SectorSize,
Offset = dvh.partitions[i].first_block * dvh.device_params.dp_secbytes,
Length = dvh.partitions[i].num_blocks * dvh.device_params.dp_secbytes / imagePlugin.Info.SectorSize,
Size = dvh.partitions[i].num_blocks * dvh.device_params.dp_secbytes,
Type = TypeToString(dvh.partitions[i].type),
Sequence = counter,
Scheme = Name
};
if(part.Size <= 0 || dvh.partitions[i].type == SGIType.Header ||
dvh.partitions[i].type == SGIType.Volume) continue;
partitions.Add(part);
counter++;
}
return true;
}
static string TypeToString(SGIType typ)
{
switch(typ)
{
case SGIType.Header: return "Volume header";
case SGIType.TrkRepl: return "Track replacements";
case SGIType.SecRepl: return "Sector replacements";
case SGIType.Swap: return "Raw data (swap)";
case SGIType.Bsd: return "4.2BSD Fast File System";
case SGIType.SystemV: return "UNIX System V";
case SGIType.Volume: return "Whole device";
case SGIType.EFS: return "EFS";
case SGIType.Lvol: return "Logical volume";
case SGIType.Rlvol: return "Raw logical volume";
case SGIType.XFS: return "XFS";
case SGIType.Xlvol: return "XFS log device";
case SGIType.Rxlvol: return "XLV volume";
case SGIType.Xvm: return "SGI XVM";
case SGIType.LinuxSwap: return "Linux swap";
case SGIType.Linux: return "Linux";
case SGIType.LinuxRAID: return "Linux RAID";
default: return "Unknown";
}
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct SGILabel
{
/// <summary></summary>
public uint magic;
/// <summary></summary>
public short root_part_num;
/// <summary></summary>
public short swap_part_num;
/// <summary></summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] boot_file;
/// <summary></summary>
public SGIDeviceParameters device_params;
/// <summary></summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 15)] public SGIVolume[] volume;
/// <summary></summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public SGIPartition[] partitions;
/// <summary></summary>
public uint csum;
/// <summary></summary>
public uint padding;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct SGIVolume
{
/// <summary></summary>
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public byte[] name;
/// <summary></summary>
public uint block_num;
/// <summary></summary>
public uint num_bytes;
}
enum SGIType : uint
{
Header = 0,
TrkRepl = 1,
SecRepl = 2,
Swap = 3,
Bsd = 4,
SystemV = 5,
Volume = 6,
EFS = 7,
Lvol = 8,
Rlvol = 9,
XFS = 0xA,
Xlvol = 0xB,
Rxlvol = 0xC,
Xvm = 0x0D,
LinuxSwap = 0x82,
Linux = 0x83,
LinuxRAID = 0xFD
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct SGIPartition
{
/// <summary></summary>
public uint num_blocks;
/// <summary></summary>
public uint first_block;
/// <summary></summary>
public SGIType type;
}
struct SGIDeviceParameters
{
public byte dp_skew;
public byte dp_gap1;
public byte dp_gap2;
public byte dp_spares_cyl;
public ushort dp_cyls;
public ushort dp_shd0;
public ushort dp_trks0;
public byte dp_ctq_depth;
public byte dp_cylshi;
public ushort dp_unused;
public ushort dp_secs;
public ushort dp_secbytes;
public ushort dp_interleave;
public uint dp_flags;
public uint dp_datarate;
public uint dp_nretries;
public uint dp_mspw;
public ushort dp_xgap1;
public ushort dp_xsync;
public ushort dp_xrdly;
public ushort dp_xgap2;
public ushort dp_xrgate;
public ushort dp_xwcont;
}
}
}
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