343 lines
12 KiB
C#
343 lines
12 KiB
C#
//
|
|
// Copyright (c) 2008-2011, Kenneth Bell
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a
|
|
// copy of this software and associated documentation files (the "Software"),
|
|
// to deal in the Software without restriction, including without limitation
|
|
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
// and/or sell copies of the Software, and to permit persons to whom the
|
|
// Software is furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Globalization;
|
|
using System.IO;
|
|
using System.Reflection;
|
|
using DiscUtils.CoreCompat;
|
|
using DiscUtils.Internal;
|
|
using DiscUtils.Partitions;
|
|
using DiscUtils.Raw;
|
|
using DiscUtils.Streams;
|
|
|
|
namespace DiscUtils
|
|
{
|
|
/// <summary>
|
|
/// VolumeManager interprets partitions and other on-disk structures (possibly combining multiple disks).
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// <para>Although file systems commonly are placed directly within partitions on a disk, in some
|
|
/// cases a logical volume manager / logical disk manager may be used, to combine disk regions in multiple
|
|
/// ways for data redundancy or other purposes.</para>
|
|
/// </remarks>
|
|
public sealed class VolumeManager
|
|
#if !NETSTANDARD
|
|
: MarshalByRefObject
|
|
#endif
|
|
{
|
|
private static List<LogicalVolumeFactory> s_logicalVolumeFactories;
|
|
private readonly List<VirtualDisk> _disks;
|
|
private bool _needScan;
|
|
|
|
private Dictionary<string, PhysicalVolumeInfo> _physicalVolumes;
|
|
private Dictionary<string, LogicalVolumeInfo> _logicalVolumes;
|
|
private static readonly Assembly _coreAssembly = ReflectionHelper.GetAssembly(typeof(VolumeManager));
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the VolumeManager class.
|
|
/// </summary>
|
|
public VolumeManager()
|
|
{
|
|
_disks = new List<VirtualDisk>();
|
|
_physicalVolumes = new Dictionary<string, PhysicalVolumeInfo>();
|
|
_logicalVolumes = new Dictionary<string, LogicalVolumeInfo>();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the VolumeManager class.
|
|
/// </summary>
|
|
/// <param name="initialDisk">The initial disk to add.</param>
|
|
public VolumeManager(VirtualDisk initialDisk)
|
|
: this()
|
|
{
|
|
AddDisk(initialDisk);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the VolumeManager class.
|
|
/// </summary>
|
|
/// <param name="initialDiskContent">Content of the initial disk to add.</param>
|
|
public VolumeManager(Stream initialDiskContent)
|
|
: this()
|
|
{
|
|
AddDisk(initialDiskContent);
|
|
}
|
|
|
|
private static List<LogicalVolumeFactory> LogicalVolumeFactories
|
|
{
|
|
get
|
|
{
|
|
if (s_logicalVolumeFactories == null)
|
|
{
|
|
List<LogicalVolumeFactory> factories = new List<LogicalVolumeFactory>();
|
|
factories.AddRange(GetLogicalVolumeFactories(_coreAssembly));
|
|
s_logicalVolumeFactories = factories;
|
|
}
|
|
|
|
return s_logicalVolumeFactories;
|
|
}
|
|
}
|
|
|
|
private static IEnumerable<LogicalVolumeFactory> GetLogicalVolumeFactories(Assembly assembly)
|
|
{
|
|
foreach (Type type in assembly.GetTypes())
|
|
{
|
|
foreach (LogicalVolumeFactoryAttribute attr in ReflectionHelper.GetCustomAttributes(type, typeof(LogicalVolumeFactoryAttribute), false))
|
|
{
|
|
yield return (LogicalVolumeFactory)Activator.CreateInstance(type);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Register new LogicalVolumeFactories detected in an assembly
|
|
/// </summary>
|
|
/// <param name="assembly">The assembly to inspect</param>
|
|
public static void RegisterLogicalVolumeFactory(Assembly assembly)
|
|
{
|
|
if (assembly == _coreAssembly) return;
|
|
LogicalVolumeFactories.AddRange(GetLogicalVolumeFactories(assembly));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the physical volumes held on a disk.
|
|
/// </summary>
|
|
/// <param name="diskContent">The contents of the disk to inspect.</param>
|
|
/// <returns>An array of volumes.</returns>
|
|
/// <remarks>
|
|
/// <para>By preference, use the form of this method that takes a disk parameter.</para>
|
|
/// <para>If the disk isn't partitioned, this method returns the entire disk contents
|
|
/// as a single volume.</para>
|
|
/// </remarks>
|
|
public static PhysicalVolumeInfo[] GetPhysicalVolumes(Stream diskContent)
|
|
{
|
|
return GetPhysicalVolumes(new Disk(diskContent, Ownership.None));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the physical volumes held on a disk.
|
|
/// </summary>
|
|
/// <param name="disk">The disk to inspect.</param>
|
|
/// <returns>An array of volumes.</returns>
|
|
/// <remarks>If the disk isn't partitioned, this method returns the entire disk contents
|
|
/// as a single volume.</remarks>
|
|
public static PhysicalVolumeInfo[] GetPhysicalVolumes(VirtualDisk disk)
|
|
{
|
|
return new VolumeManager(disk).GetPhysicalVolumes();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Adds a disk to the volume manager.
|
|
/// </summary>
|
|
/// <param name="disk">The disk to add.</param>
|
|
/// <returns>The GUID the volume manager will use to identify the disk.</returns>
|
|
public string AddDisk(VirtualDisk disk)
|
|
{
|
|
_needScan = true;
|
|
int ordinal = _disks.Count;
|
|
_disks.Add(disk);
|
|
return GetDiskId(ordinal);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Adds a disk to the volume manager.
|
|
/// </summary>
|
|
/// <param name="content">The contents of the disk to add.</param>
|
|
/// <returns>The GUID the volume manager will use to identify the disk.</returns>
|
|
public string AddDisk(Stream content)
|
|
{
|
|
return AddDisk(new Disk(content, Ownership.None));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the physical volumes from all disks added to this volume manager.
|
|
/// </summary>
|
|
/// <returns>An array of physical volumes.</returns>
|
|
public PhysicalVolumeInfo[] GetPhysicalVolumes()
|
|
{
|
|
if (_needScan)
|
|
{
|
|
Scan();
|
|
}
|
|
|
|
return new List<PhysicalVolumeInfo>(_physicalVolumes.Values).ToArray();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the logical volumes from all disks added to this volume manager.
|
|
/// </summary>
|
|
/// <returns>An array of logical volumes.</returns>
|
|
public LogicalVolumeInfo[] GetLogicalVolumes()
|
|
{
|
|
if (_needScan)
|
|
{
|
|
Scan();
|
|
}
|
|
|
|
return new List<LogicalVolumeInfo>(_logicalVolumes.Values).ToArray();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets a particular volume, based on it's identity.
|
|
/// </summary>
|
|
/// <param name="identity">The volume's identity.</param>
|
|
/// <returns>The volume information for the volume, or returns <c>null</c>.</returns>
|
|
public VolumeInfo GetVolume(string identity)
|
|
{
|
|
if (_needScan)
|
|
{
|
|
Scan();
|
|
}
|
|
|
|
PhysicalVolumeInfo pvi;
|
|
if (_physicalVolumes.TryGetValue(identity, out pvi))
|
|
{
|
|
return pvi;
|
|
}
|
|
|
|
LogicalVolumeInfo lvi;
|
|
if (_logicalVolumes.TryGetValue(identity, out lvi))
|
|
{
|
|
return lvi;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
private static void MapPhysicalVolumes(IEnumerable<PhysicalVolumeInfo> physicalVols, Dictionary<string, LogicalVolumeInfo> result)
|
|
{
|
|
foreach (PhysicalVolumeInfo physicalVol in physicalVols)
|
|
{
|
|
LogicalVolumeInfo lvi = new LogicalVolumeInfo(
|
|
physicalVol.PartitionIdentity,
|
|
physicalVol,
|
|
physicalVol.Open,
|
|
physicalVol.Length,
|
|
physicalVol.BiosType,
|
|
LogicalVolumeStatus.Healthy);
|
|
|
|
result.Add(lvi.Identity, lvi);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Scans all of the disks for their physical and logical volumes.
|
|
/// </summary>
|
|
private void Scan()
|
|
{
|
|
Dictionary<string, PhysicalVolumeInfo> newPhysicalVolumes = ScanForPhysicalVolumes();
|
|
Dictionary<string, LogicalVolumeInfo> newLogicalVolumes = ScanForLogicalVolumes(newPhysicalVolumes.Values);
|
|
|
|
_physicalVolumes = newPhysicalVolumes;
|
|
_logicalVolumes = newLogicalVolumes;
|
|
|
|
_needScan = false;
|
|
}
|
|
|
|
private Dictionary<string, LogicalVolumeInfo> ScanForLogicalVolumes(IEnumerable<PhysicalVolumeInfo> physicalVols)
|
|
{
|
|
List<PhysicalVolumeInfo> unhandledPhysical = new List<PhysicalVolumeInfo>();
|
|
Dictionary<string, LogicalVolumeInfo> result = new Dictionary<string, LogicalVolumeInfo>();
|
|
|
|
foreach (PhysicalVolumeInfo pvi in physicalVols)
|
|
{
|
|
bool handled = false;
|
|
foreach (LogicalVolumeFactory volFactory in LogicalVolumeFactories)
|
|
{
|
|
if (volFactory.HandlesPhysicalVolume(pvi))
|
|
{
|
|
handled = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!handled)
|
|
{
|
|
unhandledPhysical.Add(pvi);
|
|
}
|
|
}
|
|
|
|
MapPhysicalVolumes(unhandledPhysical, result);
|
|
|
|
foreach (LogicalVolumeFactory volFactory in LogicalVolumeFactories)
|
|
{
|
|
volFactory.MapDisks(_disks, result);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
private Dictionary<string, PhysicalVolumeInfo> ScanForPhysicalVolumes()
|
|
{
|
|
Dictionary<string, PhysicalVolumeInfo> result = new Dictionary<string, PhysicalVolumeInfo>();
|
|
|
|
// First scan physical volumes
|
|
for (int i = 0; i < _disks.Count; ++i)
|
|
{
|
|
VirtualDisk disk = _disks[i];
|
|
string diskId = GetDiskId(i);
|
|
|
|
if (PartitionTable.IsPartitioned(disk.Content))
|
|
{
|
|
foreach (PartitionTable table in PartitionTable.GetPartitionTables(disk))
|
|
{
|
|
foreach (PartitionInfo part in table.Partitions)
|
|
{
|
|
PhysicalVolumeInfo pvi = new PhysicalVolumeInfo(diskId, disk, part);
|
|
result.Add(pvi.Identity, pvi);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
PhysicalVolumeInfo pvi = new PhysicalVolumeInfo(diskId, disk);
|
|
result.Add(pvi.Identity, pvi);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
private string GetDiskId(int ordinal)
|
|
{
|
|
VirtualDisk disk = _disks[ordinal];
|
|
if (disk.IsPartitioned)
|
|
{
|
|
Guid guid = disk.Partitions.DiskGuid;
|
|
if (guid != Guid.Empty)
|
|
{
|
|
return "DG" + guid.ToString("B");
|
|
}
|
|
}
|
|
|
|
int sig = disk.Signature;
|
|
if (sig != 0)
|
|
{
|
|
return "DS" + sig.ToString("X8", CultureInfo.InvariantCulture);
|
|
}
|
|
|
|
return "DO" + ordinal;
|
|
}
|
|
}
|
|
} |