Initial commit - WPinternals 2.6

DiscUtils/LogicalDiskManager/DynamicDiskManager.cs

@@ -0,0 +1,153 @@
+//
+// 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.
+//
+
+namespace DiscUtils.LogicalDiskManager
+{
+    using System.Collections.Generic;
+    using System.IO;
+    using DiscUtils.Partitions;
+
+    /// <summary>
+    /// A class that understands Windows LDM structures, mapping physical volumes to logical volumes.
+    /// </summary>
+    public class DynamicDiskManager : IDiagnosticTraceable
+    {
+        private Dictionary<string, DynamicDiskGroup> _groups;
+
+        /// <summary>
+        /// Initializes a new instance of the DynamicDiskManager class.
+        /// </summary>
+        /// <param name="disks">The initial set of disks to manage.</param>
+        public DynamicDiskManager(params VirtualDisk[] disks)
+        {
+            _groups = new Dictionary<string, DynamicDiskGroup>();
+
+            foreach (var disk in disks)
+            {
+                Add(disk);
+            }
+        }
+
+        /// <summary>
+        /// Determines if a physical volume contains LDM data.
+        /// </summary>
+        /// <param name="volumeInfo">The volume to inspect.</param>
+        /// <returns><c>true</c> if the physical volume contains LDM data, else <c>false</c>.</returns>
+        public static bool HandlesPhysicalVolume(PhysicalVolumeInfo volumeInfo)
+        {
+            PartitionInfo pi = volumeInfo.Partition;
+            if (pi != null)
+            {
+                return IsLdmPartition(pi);
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Determines if a disk is 'dynamic' (i.e. contains LDM volumes).
+        /// </summary>
+        /// <param name="disk">The disk to inspect.</param>
+        /// <returns><c>true</c> if the disk contains LDM volumes, else <c>false</c>.</returns>
+        public static bool IsDynamicDisk(VirtualDisk disk)
+        {
+            if (disk.IsPartitioned)
+            {
+                foreach (var partition in disk.Partitions.Partitions)
+                {
+                    if (IsLdmPartition(partition))
+                    {
+                        return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Adds a new disk to be managed.
+        /// </summary>
+        /// <param name="disk">The disk to manage.</param>
+        public void Add(VirtualDisk disk)
+        {
+            PrivateHeader header = DynamicDisk.GetPrivateHeader(disk);
+
+            DynamicDiskGroup group;
+            if (_groups.TryGetValue(header.DiskGroupId, out group))
+            {
+                group.Add(disk);
+            }
+            else
+            {
+                group = new DynamicDiskGroup(disk);
+                _groups.Add(header.DiskGroupId, group);
+            }
+        }
+
+        /// <summary>
+        /// Gets the logical volumes held across the set of managed disks.
+        /// </summary>
+        /// <returns>An array of logical volumes.</returns>
+        public LogicalVolumeInfo[] GetLogicalVolumes()
+        {
+            List<LogicalVolumeInfo> result = new List<LogicalVolumeInfo>();
+            foreach (var group in _groups.Values)
+            {
+                foreach (var volume in group.GetVolumes())
+                {
+                    LogicalVolumeInfo lvi = new LogicalVolumeInfo(
+                        volume.Identity,
+                        null,
+                        volume.Open,
+                        volume.Length,
+                        volume.BiosType,
+                        volume.Status);
+                    result.Add(lvi);
+                }
+            }
+
+            return result.ToArray();
+        }
+
+        /// <summary>
+        /// Writes a diagnostic report about the state of the disk manager.
+        /// </summary>
+        /// <param name="writer">The writer to send the report to.</param>
+        /// <param name="linePrefix">The prefix to place at the start of each line.</param>
+        public void Dump(TextWriter writer, string linePrefix)
+        {
+            writer.WriteLine(linePrefix + "DISK GROUPS");
+            foreach (var group in _groups.Values)
+            {
+                group.Dump(writer, linePrefix + "  ");
+            }
+        }
+
+        private static bool IsLdmPartition(PartitionInfo partition)
+        {
+            return partition.BiosType == BiosPartitionTypes.WindowsDynamicVolume
+                   || partition.GuidType == GuidPartitionTypes.WindowsLdmMetadata
+                   || partition.GuidType == GuidPartitionTypes.WindowsLdmData;
+        }
+    }
+}