// // 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.IO; using DiscUtils.Partitions; using DiscUtils.Streams; namespace DiscUtils.LogicalDiskManager { internal class DynamicDisk : IDiagnosticTraceable { private readonly VirtualDisk _disk; private readonly PrivateHeader _header; internal DynamicDisk(VirtualDisk disk) { _disk = disk; _header = GetPrivateHeader(_disk); TocBlock toc = GetTableOfContents(); long dbStart = _header.ConfigurationStartLba * 512 + toc.Item1Start * 512; _disk.Content.Position = dbStart; Database = new Database(_disk.Content); } public SparseStream Content { get { return _disk.Content; } } public Database Database { get; } public long DataOffset { get { return _header.DataStartLba; } } public Guid GroupId { get { return string.IsNullOrEmpty(_header.DiskGroupId) ? Guid.Empty : new Guid(_header.DiskGroupId); } } public Guid Id { get { return new Guid(_header.DiskId); } } public void Dump(TextWriter writer, string linePrefix) { writer.WriteLine(linePrefix + "DISK (" + _header.DiskId + ")"); writer.WriteLine(linePrefix + " Metadata Version: " + ((_header.Version >> 16) & 0xFFFF) + "." + (_header.Version & 0xFFFF)); writer.WriteLine(linePrefix + " Timestamp: " + _header.Timestamp); writer.WriteLine(linePrefix + " Disk Id: " + _header.DiskId); writer.WriteLine(linePrefix + " Host Id: " + _header.HostId); writer.WriteLine(linePrefix + " Disk Group Id: " + _header.DiskGroupId); writer.WriteLine(linePrefix + " Disk Group Name: " + _header.DiskGroupName); writer.WriteLine(linePrefix + " Data Start: " + _header.DataStartLba + " (Sectors)"); writer.WriteLine(linePrefix + " Data Size: " + _header.DataSizeLba + " (Sectors)"); writer.WriteLine(linePrefix + " Configuration Start: " + _header.ConfigurationStartLba + " (Sectors)"); writer.WriteLine(linePrefix + " Configuration Size: " + _header.ConfigurationSizeLba + " (Sectors)"); writer.WriteLine(linePrefix + " TOC Size: " + _header.TocSizeLba + " (Sectors)"); writer.WriteLine(linePrefix + " Next TOC: " + _header.NextTocLba + " (Sectors)"); writer.WriteLine(linePrefix + " Number of Configs: " + _header.NumberOfConfigs); writer.WriteLine(linePrefix + " Config Size: " + _header.ConfigurationSizeLba + " (Sectors)"); writer.WriteLine(linePrefix + " Number of Logs: " + _header.NumberOfLogs); writer.WriteLine(linePrefix + " Log Size: " + _header.LogSizeLba + " (Sectors)"); } internal static PrivateHeader GetPrivateHeader(VirtualDisk disk) { if (disk.IsPartitioned) { long headerPos = 0; PartitionTable pt = disk.Partitions; if (pt is BiosPartitionTable) { headerPos = 0xc00; } else { foreach (PartitionInfo part in pt.Partitions) { if (part.GuidType == GuidPartitionTypes.WindowsLdmMetadata) { headerPos = part.LastSector * Sizes.Sector; } } } if (headerPos != 0) { disk.Content.Position = headerPos; byte[] buffer = new byte[Sizes.Sector]; disk.Content.Read(buffer, 0, buffer.Length); PrivateHeader hdr = new PrivateHeader(); hdr.ReadFrom(buffer, 0); return hdr; } } return null; } private TocBlock GetTableOfContents() { byte[] buffer = new byte[_header.TocSizeLba * 512]; _disk.Content.Position = _header.ConfigurationStartLba * 512 + 1 * _header.TocSizeLba * 512; _disk.Content.Read(buffer, 0, buffer.Length); TocBlock tocBlock = new TocBlock(); tocBlock.ReadFrom(buffer, 0); if (tocBlock.Signature == "TOCBLOCK") { return tocBlock; } return null; } } }