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https://github.com/aaru-dps/Aaru.git
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467 lines
21 KiB
C#
467 lines
21 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : BSD.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Partitioning scheme plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Manages BSD disklabels.
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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 © 2011-2019 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime.InteropServices;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.CommonTypes.Interfaces;
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using DiscImageChef.Console;
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namespace DiscImageChef.Partitions
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{
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public class BSD : IPartition
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{
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const uint DISKMAGIC = 0x82564557;
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const uint DISKCIGAM = 0x57455682;
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/// <summary>Maximum size of a disklabel with 22 partitions</summary>
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const uint MAX_LABEL_SIZE = 500;
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/// <summary>Known sector locations for BSD disklabel</summary>
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readonly ulong[] labelLocations = {0, 1, 2, 9};
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/// <summary>Known byte offsets for BSD disklabel</summary>
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readonly uint[] labelOffsets = {0, 9, 64, 128, 516};
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public string Name => "BSD disklabel";
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public Guid Id => new Guid("246A6D93-4F1A-1F8A-344D-50187A5513A9");
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public string Author => "Natalia Portillo";
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public bool GetInformation(IMediaImage imagePlugin, out List<Partition> partitions, ulong sectorOffset)
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{
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partitions = new List<Partition>();
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uint run = (MAX_LABEL_SIZE + labelOffsets.Last()) / imagePlugin.Info.SectorSize;
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if((MAX_LABEL_SIZE + labelOffsets.Last()) % imagePlugin.Info.SectorSize > 0) run++;
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DiskLabel dl = new DiskLabel();
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bool found = false;
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foreach(ulong location in labelLocations)
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{
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if(location + run + sectorOffset >= imagePlugin.Info.Sectors) return false;
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byte[] tmp = imagePlugin.ReadSectors(location + sectorOffset, run);
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foreach(uint offset in labelOffsets)
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{
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byte[] sector = new byte[MAX_LABEL_SIZE];
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Array.Copy(tmp, offset, sector, 0, MAX_LABEL_SIZE);
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dl = GetDiskLabel(sector);
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DicConsole.DebugWriteLine("BSD plugin",
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"dl.magic on sector {0} at offset {1} = 0x{2:X8} (expected 0x{3:X8})",
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location + sectorOffset, offset, dl.d_magic, DISKMAGIC);
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if((dl.d_magic != DISKMAGIC || dl.d_magic2 != DISKMAGIC) &&
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(dl.d_magic != DISKCIGAM || dl.d_magic2 != DISKCIGAM)) continue;
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found = true;
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break;
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}
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if(found) break;
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}
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if(!found) return false;
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if(dl.d_magic == DISKCIGAM && dl.d_magic2 == DISKCIGAM) dl = SwapDiskLabel(dl);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_type = {0}", dl.d_type);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_subtype = {0}", dl.d_subtype);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_typename = {0}",
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StringHandlers.CToString(dl.d_typename));
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_packname = {0}",
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StringHandlers.CToString(dl.d_packname));
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_secsize = {0}", dl.d_secsize);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_nsectors = {0}", dl.d_nsectors);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_ntracks = {0}", dl.d_ntracks);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_ncylinders = {0}", dl.d_ncylinders);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_secpercyl = {0}", dl.d_secpercyl);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_secperunit = {0}", dl.d_secperunit);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_sparespertrack = {0}", dl.d_sparespertrack);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_sparespercyl = {0}", dl.d_sparespercyl);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_acylinders = {0}", dl.d_acylinders);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_rpm = {0}", dl.d_rpm);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_interleave = {0}", dl.d_interleave);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_trackskew = {0}", dl.d_trackskew);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_cylskeew = {0}", dl.d_cylskeew);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_headswitch = {0}", dl.d_headswitch);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_trkseek = {0}", dl.d_trkseek);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_flags = {0}", dl.d_flags);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_drivedata[0] = {0}", dl.d_drivedata[0]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_drivedata[1] = {0}", dl.d_drivedata[1]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_drivedata[2] = {0}", dl.d_drivedata[2]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_drivedata[3] = {0}", dl.d_drivedata[3]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_drivedata[4] = {0}", dl.d_drivedata[4]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_spare[0] = {0}", dl.d_spare[0]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_spare[1] = {0}", dl.d_spare[1]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_spare[2] = {0}", dl.d_spare[2]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_spare[3] = {0}", dl.d_spare[3]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_spare[4] = {0}", dl.d_spare[4]);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_magic2 = 0x{0:X8}", dl.d_magic2);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_checksum = 0x{0:X8}", dl.d_checksum);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_npartitions = {0}", dl.d_npartitions);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_bbsize = {0}", dl.d_bbsize);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_sbsize = {0}", dl.d_sbsize);
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ulong counter = 0;
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bool addSectorOffset = false;
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for(int i = 0; i < dl.d_npartitions && i < 22; i++)
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{
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_partitions[i].p_offset = {0}",
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dl.d_partitions[i].p_offset);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_partitions[i].p_size = {0}", dl.d_partitions[i].p_size);
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DicConsole.DebugWriteLine("BSD plugin", "dl.d_partitions[i].p_fstype = {0} ({1})",
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dl.d_partitions[i].p_fstype, fsTypeToString(dl.d_partitions[i].p_fstype));
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Partition part = new Partition
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{
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Start = dl.d_partitions[i].p_offset * dl.d_secsize / imagePlugin.Info.SectorSize,
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Offset = dl.d_partitions[i].p_offset * dl.d_secsize,
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Length = dl.d_partitions[i].p_size * dl.d_secsize / imagePlugin.Info.SectorSize,
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Size = dl.d_partitions[i].p_size * dl.d_secsize,
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Type = fsTypeToString(dl.d_partitions[i].p_fstype),
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Sequence = counter,
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Scheme = Name
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};
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if(dl.d_partitions[i].p_fstype == fsType.Unused) continue;
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// Crude and dirty way to know if the disklabel is relative to its parent partition...
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if(dl.d_partitions[i].p_offset < sectorOffset && !addSectorOffset) addSectorOffset = true;
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if(addSectorOffset)
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{
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part.Start += sectorOffset;
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part.Offset += sectorOffset * imagePlugin.Info.SectorSize;
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}
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DicConsole.DebugWriteLine("BSD plugin", "part.start = {0}", part.Start);
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DicConsole.DebugWriteLine("BSD plugin", "Adding it...");
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partitions.Add(part);
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counter++;
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}
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return partitions.Count > 0;
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}
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internal static string fsTypeToString(fsType typ)
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{
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switch(typ)
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{
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case fsType.Unused: return "Unused entry";
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case fsType.Swap: return "Swap partition";
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case fsType.V6: return "UNIX 6th Edition";
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case fsType.V7: return "UNIX 7th Edition";
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case fsType.SystemV: return "UNIX System V";
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case fsType.V7_1K: return "UNIX 7th Edition with 1K blocks";
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case fsType.V8: return "UNIX 8th Edition with 4K blocks";
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case fsType.BSDFFS: return "4.2BSD Fast File System";
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case fsType.BSDLFS: return "4.4LFS";
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case fsType.HPFS: return "HPFS";
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case fsType.ISO9660: return "ISO9660";
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case fsType.Boot:
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case fsType.SysVBoot: return "Boot";
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case fsType.AFFS: return "Amiga FFS";
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case fsType.HFS: return "Apple HFS";
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case fsType.ADVfs: return "Digital Advanced File System";
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case fsType.LSMpublic: return "Digital LSM Public Region";
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case fsType.LSMprivate: return "Digital LSM Private Region";
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case fsType.LSMsimple: return "Digital LSM Simple Disk";
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case fsType.CCD: return "Concatenated disk";
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case fsType.JFS2: return "IBM JFS2";
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case fsType.HAMMER: return "Hammer";
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case fsType.HAMMER2: return "Hammer2";
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case fsType.UDF: return "UDF";
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case fsType.EFS: return "EFS";
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case fsType.ZFS: return "ZFS";
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case fsType.NANDFS: return "FreeBSD nandfs";
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case fsType.MSDOS: return "FAT";
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case fsType.Other: return "Other or unknown";
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default: return "Unknown";
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}
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}
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static DiskLabel GetDiskLabel(byte[] disklabel)
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{
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GCHandle handle = GCHandle.Alloc(disklabel, GCHandleType.Pinned);
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DiskLabel dl = (DiskLabel)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(DiskLabel));
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handle.Free();
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return dl;
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}
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static DiskLabel SwapDiskLabel(DiskLabel dl)
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{
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dl = (DiskLabel)Helpers.Marshal.SwapStructureMembersEndian(dl);
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for(int i = 0; i < dl.d_drivedata.Length; i++) dl.d_drivedata[i] = Swapping.Swap(dl.d_drivedata[i]);
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for(int i = 0; i < dl.d_spare.Length; i++) dl.d_spare[i] = Swapping.Swap(dl.d_spare[i]);
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for(int i = 0; i < dl.d_partitions.Length; i++)
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dl.d_partitions[i] = (BSDPartition)Helpers.Marshal.SwapStructureMembersEndian(dl.d_partitions[i]);
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return dl;
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}
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/// <summary>Drive type</summary>
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enum dType : ushort
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{
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/// <summary>SMD, XSMD</summary>
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SMD = 1,
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/// <summary>MSCP</summary>
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MSCP = 2,
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/// <summary>Other DEC (rk, rl)</summary>
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DEC = 3,
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/// <summary>SCSI</summary>
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SCSI = 4,
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/// <summary>ESDI</summary>
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ESDI = 5,
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/// <summary>ST506 et al</summary>
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ST506 = 6,
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/// <summary>CS/80 on HP-IB</summary>
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HPIB = 7,
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/// <summary>HP Fiber-link</summary>
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HPFL = 8,
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/// <summary>Floppy</summary>
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FLOPPY = 10,
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/// <summary>Concatenated disk</summary>
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CCD = 11,
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/// <summary>uvnode pseudo-disk</summary>
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VND = 12,
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/// <summary>DiskOnChip</summary>
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DOC2K = 13,
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/// <summary>ATAPI</summary>
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ATAPI = 13,
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/// <summary>CMU RAIDframe</summary>
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RAID = 14,
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/// <summary>Logical disk</summary>
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LD = 15,
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/// <summary>IBM JFS 2</summary>
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JFS2 = 16,
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/// <summary>Cryptographic pseudo-disk</summary>
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CGD = 17,
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/// <summary>Vinum volume</summary>
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VINUM = 18,
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/// <summary>Flash memory devices</summary>
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FLASH = 19,
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/// <summary>Device-mapper pseudo-disk devices</summary>
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DM = 20,
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/// <summary>Rump virtual disk</summary>
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RUMPD = 21,
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/// <summary>Memory disk</summary>
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MD = 22
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}
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/// <summary>Filesystem type</summary>
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internal enum fsType : byte
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{
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/// <summary>Unused entry</summary>
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Unused = 0,
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/// <summary>Swap partition</summary>
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Swap = 1,
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/// <summary>UNIX 6th Edition</summary>
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V6 = 2,
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/// <summary>UNIX 7th Edition</summary>
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V7 = 3,
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/// <summary>UNIX System V</summary>
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SystemV = 4,
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/// <summary>UNIX 7th Edition with 1K blocks</summary>
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V7_1K = 5,
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/// <summary>UNIX 8th Edition with 4K blocks</summary>
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V8 = 6,
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/// <summary>4.2BSD Fast File System</summary>
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BSDFFS = 7,
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/// <summary>MS-DOS filesystem</summary>
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MSDOS = 8,
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/// <summary>4.4LFS</summary>
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BSDLFS = 9,
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/// <summary>In use, unknown or unsupported</summary>
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Other = 10,
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/// <summary>HPFS</summary>
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HPFS = 11,
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/// <summary>ISO9660</summary>
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ISO9660 = 12,
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/// <summary>Boot partition</summary>
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Boot = 13,
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/// <summary>Amiga FFS</summary>
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AFFS = 14,
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/// <summary>Apple HFS</summary>
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HFS = 15,
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/// <summary>Acorn ADFS</summary>
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FileCore = 16,
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/// <summary>Digital Advanced File System</summary>
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ADVfs = 16,
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/// <summary>Digital LSM Public Region</summary>
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LSMpublic = 17,
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/// <summary>Linux ext2</summary>
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ext2 = 17,
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/// <summary>Digital LSM Private Region</summary>
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LSMprivate = 18,
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/// <summary>NTFS</summary>
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NTFS = 18,
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/// <summary>Digital LSM Simple Disk</summary>
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LSMsimple = 19,
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/// <summary>RAIDframe component</summary>
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RAID = 19,
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/// <summary>Concatenated disk component</summary>
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CCD = 20,
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/// <summary>IBM JFS2</summary>
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JFS2 = 21,
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/// <summary>Apple UFS</summary>
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AppleUFS = 22,
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/// <summary>Hammer filesystem</summary>
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HAMMER = 22,
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/// <summary>Hammer2 filesystem</summary>
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HAMMER2 = 23,
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/// <summary>UDF</summary>
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UDF = 24,
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/// <summary>System V Boot filesystem</summary>
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SysVBoot = 25,
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/// <summary>EFS</summary>
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EFS = 26,
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/// <summary>ZFS</summary>
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ZFS = 27,
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/// <summary>NiLFS</summary>
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NILFS = 27,
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/// <summary>Cryptographic disk</summary>
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CGD = 28,
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/// <summary>MINIX v3</summary>
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MINIX = 29,
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/// <summary>FreeBSD nandfs</summary>
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NANDFS = 30
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}
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/// <summary>
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/// Drive flags
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/// </summary>
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[Flags]
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enum dFlags : uint
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{
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/// <summary>Removable media</summary>
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Removable = 0x01,
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/// <summary>Drive supports ECC</summary>
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ECC = 0x02,
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/// <summary>Drive supports bad sector forwarding</summary>
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BadSectorForward = 0x04,
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/// <summary>Disk emulator</summary>
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RAMDisk = 0x08,
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/// <summary>Can do back to back transfer</summary>
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Chain = 0x10,
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/// <summary>Dynamic geometry device</summary>
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DynamicGeometry = 0x20
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct DiskLabel
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{
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/// <summary>
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/// <see cref="DISKMAGIC" />
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/// </summary>
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public uint d_magic;
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/// <summary>
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/// <see cref="dType" />
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/// </summary>
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public dType d_type;
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/// <summary>Disk subtype</summary>
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public ushort d_subtype;
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/// <summary>Type name</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
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public byte[] d_typename;
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/// <summary>Pack identifier</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
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public byte[] d_packname;
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/// <summary>Bytes per sector</summary>
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public uint d_secsize;
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/// <summary>Sectors per track</summary>
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public uint d_nsectors;
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/// <summary>Tracks per cylinder</summary>
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public uint d_ntracks;
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/// <summary>Cylinders per unit</summary>
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public uint d_ncylinders;
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/// <summary>Sectors per cylinder</summary>
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public uint d_secpercyl;
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/// <summary>Sectors per unit</summary>
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public uint d_secperunit;
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/// <summary>Spare sectors per track</summary>
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public ushort d_sparespertrack;
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/// <summary>Spare sectors per cylinder</summary>
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public ushort d_sparespercyl;
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/// <summary>Alternate cylinders</summary>
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public uint d_acylinders;
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/// <summary>Rotational speed</summary>
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public ushort d_rpm;
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/// <summary>Hardware sector interleave</summary>
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public ushort d_interleave;
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/// <summary>Sector 0 skew per track</summary>
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public ushort d_trackskew;
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/// <summary>Sector 0 sker per cylinder</summary>
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public ushort d_cylskeew;
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/// <summary>Head switch time in microseconds</summary>
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public uint d_headswitch;
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/// <summary>Track to track seek in microseconds</summary>
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public uint d_trkseek;
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/// <summary>
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/// <see cref="dFlags" />
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/// </summary>
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public dFlags d_flags;
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/// <summary>Drive-specific information</summary>
|
|
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
|
|
public uint[] d_drivedata;
|
|
/// <summary>Reserved</summary>
|
|
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
|
|
public uint[] d_spare;
|
|
/// <summary><see cref="DISKMAGIC" /> again</summary>
|
|
public uint d_magic2;
|
|
/// <summary>XOR of data</summary>
|
|
public ushort d_checksum;
|
|
/// <summary>How many partitions</summary>
|
|
public ushort d_npartitions;
|
|
/// <summary>Size of boot area in bytes</summary>
|
|
public uint d_bbsize;
|
|
/// <summary>Maximum size of superblock in bytes</summary>
|
|
public uint d_sbsize;
|
|
/// <summary>Partitions</summary>
|
|
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 22)]
|
|
public BSDPartition[] d_partitions;
|
|
}
|
|
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
struct BSDPartition
|
|
{
|
|
/// <summary>Sectors in partition</summary>
|
|
public uint p_size;
|
|
/// <summary>Starting sector</summary>
|
|
public uint p_offset;
|
|
/// <summary>Fragment size</summary>
|
|
public uint p_fsize;
|
|
/// <summary>Filesystem type, <see cref="fsType" /></summary>
|
|
public fsType p_fstype;
|
|
/// <summary>Fragment size</summary>
|
|
public byte p_frag;
|
|
/// <summary>Cylinder per group</summary>
|
|
public ushort p_cpg;
|
|
}
|
|
}
|
|
} |