120 lines
4.5 KiB
C#
120 lines
4.5 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 DiscUtils.Streams;
|
|
|
|
namespace DiscUtils
|
|
{
|
|
/// <summary>
|
|
/// Information about a logical disk volume, which may be backed by one or more physical volumes.
|
|
/// </summary>
|
|
public sealed class LogicalVolumeInfo : VolumeInfo
|
|
{
|
|
private Guid _guid;
|
|
private readonly SparseStreamOpenDelegate _opener;
|
|
private readonly PhysicalVolumeInfo _physicalVol;
|
|
|
|
internal LogicalVolumeInfo(Guid guid, PhysicalVolumeInfo physicalVolume, SparseStreamOpenDelegate opener,
|
|
long length, byte biosType, LogicalVolumeStatus status)
|
|
{
|
|
_guid = guid;
|
|
_physicalVol = physicalVolume;
|
|
_opener = opener;
|
|
Length = length;
|
|
BiosType = biosType;
|
|
Status = status;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the disk geometry of the underlying storage medium (as used in BIOS calls), may be null.
|
|
/// </summary>
|
|
public override Geometry BiosGeometry
|
|
{
|
|
get { return _physicalVol == null ? Geometry.Null : _physicalVol.BiosGeometry; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the one-byte BIOS type for this volume, which indicates the content.
|
|
/// </summary>
|
|
public override byte BiosType { get; }
|
|
|
|
/// <summary>
|
|
/// The stable identity for this logical volume.
|
|
/// </summary>
|
|
/// <remarks>The stability of the identity depends the disk structure.
|
|
/// In some cases the identity may include a simple index, when no other information
|
|
/// is available. Best practice is to add disks to the Volume Manager in a stable
|
|
/// order, if the stability of this identity is paramount.</remarks>
|
|
public override string Identity
|
|
{
|
|
get
|
|
{
|
|
if (_guid != Guid.Empty)
|
|
{
|
|
return "VLG" + _guid.ToString("B");
|
|
}
|
|
return "VLP:" + _physicalVol.Identity;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the length of the volume (in bytes).
|
|
/// </summary>
|
|
public override long Length { get; }
|
|
|
|
/// <summary>
|
|
/// Gets the disk geometry of the underlying storage medium, if any (may be Geometry.Null).
|
|
/// </summary>
|
|
public override Geometry PhysicalGeometry
|
|
{
|
|
get { return _physicalVol == null ? Geometry.Null : _physicalVol.PhysicalGeometry; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the offset of this volume in the underlying storage medium, if any (may be Zero).
|
|
/// </summary>
|
|
public override long PhysicalStartSector
|
|
{
|
|
get { return _physicalVol == null ? 0 : _physicalVol.PhysicalStartSector; }
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the status of the logical volume, indicating volume health.
|
|
/// </summary>
|
|
public LogicalVolumeStatus Status { get; }
|
|
|
|
/// <summary>
|
|
/// Gets the underlying physical volume info
|
|
/// </summary>
|
|
public PhysicalVolumeInfo PhysicalVolume { get { return _physicalVol; } }
|
|
|
|
/// <summary>
|
|
/// Opens a stream with access to the content of the logical volume.
|
|
/// </summary>
|
|
/// <returns>The volume's content as a stream.</returns>
|
|
public override SparseStream Open()
|
|
{
|
|
return _opener();
|
|
}
|
|
}
|
|
} |