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404 lines
15 KiB
C#
404 lines
15 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 © 2011-2017 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.Runtime.InteropServices;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.ImagePlugins;
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namespace DiscImageChef.PartPlugins
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{
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class BSD : PartPlugin
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{
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public const uint DISKMAGIC = 0x82564557;
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public BSD()
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{
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Name = "BSD disklabel";
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PluginUUID = new Guid("246A6D93-4F1A-1F8A-344D-50187A5513A9");
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}
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public override bool GetInformation(ImagePlugin imagePlugin, out List<Partition> partitions)
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{
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partitions = new List<Partition>();
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byte[] sector = imagePlugin.ReadSector(0);
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if(sector.Length < 512)
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return false;
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bool found = false;
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DiskLabel dl = GetDiskLabel(sector);
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if(dl.d_magic == DISKMAGIC || dl.d_magic2 == DISKMAGIC)
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found = true;
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else
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{
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sector = imagePlugin.ReadSector(1);
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dl = GetDiskLabel(sector);
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found |= (dl.d_magic == DISKMAGIC || dl.d_magic2 == DISKMAGIC);
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}
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if(found)
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{
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ulong counter = 0;
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foreach(BSDPartition entry in dl.d_partitions)
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{
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Partition part = new Partition();
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part.PartitionStartSector = entry.p_offset;
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part.PartitionStart = (entry.p_offset * dl.d_secsize);
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part.PartitionLength = entry.p_size;
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part.PartitionSectors = (entry.p_size * dl.d_secsize);
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part.PartitionType = fsTypeToString(entry.p_fstype);
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part.PartitionSequence = counter;
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if(entry.p_fstype != fsType.Unused)
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{
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partitions.Add(part);
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counter++;
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}
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}
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}
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return found;
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}
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/// <summary>Drive type</summary>
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public 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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public 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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public 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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public struct DiskLabel
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{
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/// <summary><see cref="DISKMAGIC"/></summary>
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public uint d_magic;
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/// <summary><see cref="dType"/></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><see cref="dFlags"/></summary>
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public dFlags d_flags;
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/// <summary>Drive-specific information</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
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public uint[] d_drivedata;
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/// <summary>Reserved</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
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/// <summary></summary>
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public uint[] d_spare;
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/// <summary><see cref="DISKMAGIC"/> again</summary>
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public uint d_magic2;
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/// <summary>XOR of data</summary>
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public ushort d_checksum;
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/// <summary>How many partitions</summary>
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public ushort d_npartitions;
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/// <summary>Size of boot area in bytes</summary>
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public uint d_bbsize;
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/// <summary>Maximum size of superblock in bytes</summary>
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public uint d_sbsize;
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/// <summary>Partitions</summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 18)]
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public BSDPartition[] d_partitions;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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public struct BSDPartition
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{
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/// <summary>Sectors in partition</summary>
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public uint p_size;
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/// <summary>Starting sector</summary>
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public uint p_offset;
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/// <summary>Fragment size</summary>
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public uint p_fsize;
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/// <summary>Filesystem type, <see cref="fsType"/></summary>
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public fsType p_fstype;
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/// <summary>Fragment size</summary>
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public byte p_frag;
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/// <summary>Cylinder per group</summary>
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public ushort p_cpg;
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}
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public 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:
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return "Unused entry";
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case fsType.Swap:
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return "Swap partition";
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case fsType.V6:
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return "UNIX 6th Edition";
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case fsType.V7:
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return "UNIX 7th Edition";
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case fsType.SystemV:
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return "UNIX System V";
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case fsType.V7_1K:
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return "UNIX 7th Edition with 1K blocks";
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case fsType.V8:
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return "UNIX 8th Edition with 4K blocks";
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case fsType.BSDFFS:
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return "4.2BSD Fast File System";
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case fsType.BSDLFS:
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return "4.4LFS";
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case fsType.HPFS:
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return "HPFS";
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case fsType.ISO9660:
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return "ISO9660";
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case fsType.Boot:
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return "Boot";
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case fsType.AFFS:
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return "Amiga FFS";
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case fsType.HFS:
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return "Apple HFS";
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case fsType.ADVfs:
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return "Digital Advanced File System";
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case fsType.LSMpublic:
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return "Digital LSM Public Region";
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case fsType.LSMprivate:
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return "Digital LSM Private Region";
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case fsType.LSMsimple:
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return "Digital LSM Simple Disk";
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case fsType.CCD:
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return "Concatenated disk";
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case fsType.JFS2:
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return "IBM JFS2";
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case fsType.HAMMER:
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return "Hammer";
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case fsType.HAMMER2:
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return "Hammer2";
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case fsType.UDF:
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return "UDF";
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case fsType.EFS:
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return "EFS";
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case fsType.ZFS:
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return "ZFS";
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case fsType.NANDFS:
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return "FreeBSD nandfs";
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case fsType.Other:
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return "Other or unknown";
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default:
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return "Unknown";
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}
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}
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public static DiskLabel GetDiskLabel(byte[] disklabel)
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{
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DiskLabel dl = new DiskLabel();
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IntPtr dlPtr = Marshal.AllocHGlobal(512);
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Marshal.Copy(disklabel, 0, dlPtr, 512);
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dl = (DiskLabel)Marshal.PtrToStructure(dlPtr, typeof(DiskLabel));
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Marshal.FreeHGlobal(dlPtr);
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return dl;
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}
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}
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} |