// Private
#region Methods
private static void Create(IBlockIO deviceIO, string volumeName, Geometry geometry, Guid volumeID, PrivateKey signatureKey)
{
// Write the Partition Cluster
FileSystemHeaderCluster fileSystemHeaderCluster = new FileSystemHeaderCluster(deviceIO.BlockSizeBytes, volumeID);
fileSystemHeaderCluster.BytesPerDataCluster = geometry.BytesPerCluster;
fileSystemHeaderCluster.ClustersPerTrack = geometry.ClustersPerTrack;
fileSystemHeaderCluster.DataClustersPerTrack = geometry.DataClustersPerTrack;
fileSystemHeaderCluster.TrackCount = geometry.TrackCount;
fileSystemHeaderCluster.VolumeName = volumeName;
byte[] data = new byte[fileSystemHeaderCluster.ClusterSizeBytes];
fileSystemHeaderCluster.Save(data, 0, signatureKey);
deviceIO.Write(0, data, 0, data.Length);
// Cluster State Table
int entryCount = geometry.ClustersPerTrack * geometry.TrackCount;
int clusterCount = (entryCount + ClusterStatesCluster.CalculateElementsPerCluster(geometry.BytesPerCluster) - 1) /
ClusterStatesCluster.CalculateElementsPerCluster(geometry.BytesPerCluster);
ClusterTable <ClusterState> clusterStateTable = new ClusterTable <ClusterState>(
Enumerable.Range(0, clusterCount),
sizeof(ClusterState),
(address) => new ClusterStatesCluster(address, geometry.BytesPerCluster, volumeID));
// Next Cluster Address Table
entryCount = geometry.DataClustersPerTrack * geometry.TrackCount;
clusterCount = (entryCount + Int32ArrayCluster.CalculateElementsPerCluster(geometry.BytesPerCluster) - 1) /
Int32ArrayCluster.CalculateElementsPerCluster(geometry.BytesPerCluster);
ClusterTable <int> nextClusterAddressTable = new ClusterTable <int>(
Enumerable.Range(clusterStateTable.ClusterAddresses.Last() + 1, clusterCount),
sizeof(int),
(address) => new Int32ArrayCluster(address, geometry.BytesPerCluster, volumeID, ClusterType.NextClusterAddressTable));
// Bytes Used Table
ClusterTable <int> bytesUsedTable = new ClusterTable <int>(
Enumerable.Range(nextClusterAddressTable.ClusterAddresses.Last() + 1, clusterCount),
sizeof(int),
(address) => new Int32ArrayCluster(address, geometry.BytesPerCluster, volumeID, ClusterType.BytesUsedTable));
entryCount = geometry.ClustersPerTrack * geometry.TrackCount;
clusterCount = (entryCount + VerifyTimesCluster.CalculateElementsPerCluster(geometry.BytesPerCluster) - 1) /
VerifyTimesCluster.CalculateElementsPerCluster(geometry.BytesPerCluster);
// Verify Time Table
ClusterTable <DateTime> verifyTimeTable = new ClusterTable <DateTime>(
Enumerable.Range(bytesUsedTable.ClusterAddresses.Last() + 1, clusterCount),
sizeof(long),
(address) => new VerifyTimesCluster(address, geometry.BytesPerCluster, volumeID));
// Directory Table
MutableObjectClusterTable <Directory> directoryTable = new MutableObjectClusterTable <Directory>(
new int[] { verifyTimeTable.ClusterAddresses.Last() + 1 },
Directory.StorageLength,
(address) => Directory.CreateArrayCluster(address));
// File Table
MutableObjectClusterTable <File> fileTable = new MutableObjectClusterTable <File>(
new int[] { directoryTable.ClusterAddresses.Last() + 1 },
File.StorageLength,
(address) => File.CreateArrayCluster(address));
// Access Rules Table
ClusterTable <SrfsAccessRule> accessRules = new ClusterTable <SrfsAccessRule>(
new int[] { fileTable.ClusterAddresses.Last() + 1 },
SrfsAccessRule.StorageLength + sizeof(bool),
(address) => SrfsAccessRule.CreateArrayCluster(address));
// Audit Rules Table
ClusterTable <SrfsAuditRule> auditRules = new ClusterTable <SrfsAuditRule>(
new int[] { accessRules.ClusterAddresses.Last() + 1 },
SrfsAuditRule.StorageLength + sizeof(bool),
(address) => SrfsAuditRule.CreateArrayCluster(address));
// Initialize the tables
int nDataClusters = geometry.DataClustersPerTrack * geometry.TrackCount;
int nParityClusters = geometry.ParityClustersPerTrack * geometry.TrackCount;
for (int i = 0; i < nDataClusters; i++)
{
clusterStateTable[i] = ClusterState.Data | ClusterState.Unwritten;
}
for (int i = nDataClusters; i < nDataClusters + nParityClusters; i++)
{
clusterStateTable[i] = ClusterState.Parity | ClusterState.Unwritten;
}
for (int i = nDataClusters + nParityClusters; i < clusterStateTable.Count; i++)
{
clusterStateTable[i] = ClusterState.Null;
}
for (int i = 0; i < clusterStateTable.Count; i++)
{
clusterStateTable[i] = ClusterState.None;
}
for (int i = 0; i < nextClusterAddressTable.Count; i++)
{
nextClusterAddressTable[i] = Constants.NoAddress;
}
for (int i = 0; i < bytesUsedTable.Count; i++)
{
bytesUsedTable[i] = 0;
}
for (int i = 0; i < verifyTimeTable.Count; i++)
{
verifyTimeTable[i] = DateTime.MinValue;
}
for (int i = 0; i < directoryTable.Count; i++)
{
directoryTable[i] = null;
}
for (int i = 0; i < fileTable.Count; i++)
{
fileTable[i] = null;
}
for (int i = 0; i < accessRules.Count; i++)
{
accessRules[i] = null;
}
for (int i = 0; i < auditRules.Count; i++)
{
auditRules[i] = null;
}
// Update the cluster state and next cluster address tables
foreach (var t in new IEnumerable <int>[] {
clusterStateTable.ClusterAddresses,
nextClusterAddressTable.ClusterAddresses,
bytesUsedTable.ClusterAddresses,
verifyTimeTable.ClusterAddresses,
directoryTable.ClusterAddresses,
fileTable.ClusterAddresses,
accessRules.ClusterAddresses,
auditRules.ClusterAddresses
})
{
foreach (var n in t)
{
clusterStateTable[n] = ClusterState.System | ClusterState.Used;
nextClusterAddressTable[n] = n + 1;
}
nextClusterAddressTable[t.Last()] = Constants.NoAddress;
}
// Create the root directory
Directory dir = new Directory(0, "");
dir.Attributes = System.IO.FileAttributes.Directory;
dir.ParentID = Constants.NoID;
dir.Owner = WindowsIdentity.GetCurrent().User;
dir.Group = WindowsIdentity.GetCurrent().User;
directoryTable[0] = dir;
accessRules[0] = new SrfsAccessRule(dir, new FileSystemAccessRule(WindowsIdentity.GetCurrent().User, FileSystemRights.FullControl,
InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit, PropagationFlags.None,
AccessControlType.Allow));
SimpleClusterIO clusterIO = new SimpleClusterIO(deviceIO, fileSystemHeaderCluster.BytesPerDataCluster);
clusterStateTable.Flush(clusterIO);
nextClusterAddressTable.Flush(clusterIO);
bytesUsedTable.Flush(clusterIO);
verifyTimeTable.Flush(clusterIO);
directoryTable.Flush(clusterIO);
fileTable.Flush(clusterIO);
accessRules.Flush(clusterIO);
auditRules.Flush(clusterIO);
}
// Public
#region Construction / Destruction
/// <summary>
/// Open a file system.
/// </summary>
/// <param name="partition"></param>
/// <param name="signatureKeys"></param>
/// <param name="decryptionKey"></param>
/// <param name="options"></param>
public FileSystem(IBlockIO device, Dictionary <KeyThumbprint, PublicKey> signatureKeys, PrivateKey decryptionKey, Options options)
{
_keys = new Dictionary <Signature, CngKey>();
foreach (var p in _keys)
{
_keys.Add(p.Key, p.Value);
}
_decryptionKey = decryptionKey;
_options = options;
_readOnly = true;
// Create IO Devices
_deviceIO = device;
_clusterIO = new FileSystemClusterIO(this, _deviceIO);
_disposeDeviceIO = true;
// Initialize Indices
_freeClusterSearchStart = 0;
_nextEntryID = 0;
_nextDirectoryIndex = 0;
_nextFileIndex = 0;
_nextAccessRuleIndex = 0;
_nextAuditRuleIndex = 0;
// Create Indexes
_directoryIndex = new Dictionary <int, int>();
_containedDirectoriesIndex = new Dictionary <int, SortedList <string, Directory> >();
_containedFilesIndex = new Dictionary <int, SortedList <string, File> >();
_fileIndex = new Dictionary <int, int>();
_accessRulesIndex = new Dictionary <int, List <int> >();
_auditRulesIndex = new Dictionary <int, List <int> >();
// Read the File System Header Cluster
FileSystemHeaderCluster fileSystemHeaderCluster = new FileSystemHeaderCluster(_deviceIO.BlockSizeBytes, Guid.Empty);
byte[] header = new byte[FileSystemHeaderCluster.CalculateClusterSize(_deviceIO.BlockSizeBytes)];
_deviceIO.Read(0, header, 0, header.Length);
fileSystemHeaderCluster.Load(header, 0, signatureKeys, options);
// Initialize values from the File System Header Cluster
_geometry = new Geometry(
fileSystemHeaderCluster.BytesPerDataCluster,
fileSystemHeaderCluster.ClustersPerTrack,
fileSystemHeaderCluster.DataClustersPerTrack,
fileSystemHeaderCluster.TrackCount);
_volumeName = fileSystemHeaderCluster.VolumeName;
_volumeID = fileSystemHeaderCluster.VolumeID;
// Initialize the Cluster State Table
int entryCount = _geometry.ClustersPerTrack * _geometry.TrackCount;
int clusterCount = (entryCount + ClusterStatesCluster.CalculateElementsPerCluster(_geometry.BytesPerCluster) - 1) /
ClusterStatesCluster.CalculateElementsPerCluster(_geometry.BytesPerCluster);
_clusterStateTable = new ClusterTable <ClusterState>(
Enumerable.Range(0, clusterCount),
sizeof(ClusterState),
(address) => new ClusterStatesCluster(address, _geometry.BytesPerCluster, _volumeID));
_clusterStateTable.Load(_clusterIO);
// Initialize the Next Cluster Address Table
entryCount = _geometry.DataClustersPerTrack * _geometry.TrackCount;
clusterCount = (entryCount + Int32ArrayCluster.CalculateElementsPerCluster(_geometry.BytesPerCluster) - 1) /
Int32ArrayCluster.CalculateElementsPerCluster(_geometry.BytesPerCluster);
_nextClusterAddressTable = new ClusterTable <int>(
Enumerable.Range(_clusterStateTable.ClusterAddresses.Last() + 1, clusterCount),
sizeof(int),
(address) => new Int32ArrayCluster(address, _geometry.BytesPerCluster, _volumeID, ClusterType.NextClusterAddressTable));
_nextClusterAddressTable.Load(_clusterIO);
// Initialize the Bytes Used Table
_bytesUsedTable = new ClusterTable <int>(
Enumerable.Range(_nextClusterAddressTable.ClusterAddresses.Last() + 1, clusterCount),
sizeof(int),
(address) => new Int32ArrayCluster(address, _geometry.BytesPerCluster, _volumeID, ClusterType.BytesUsedTable));
_bytesUsedTable.Load(_clusterIO);
entryCount = _geometry.ClustersPerTrack * _geometry.TrackCount;
clusterCount = (entryCount + VerifyTimesCluster.CalculateElementsPerCluster(_geometry.BytesPerCluster) - 1) /
VerifyTimesCluster.CalculateElementsPerCluster(_geometry.BytesPerCluster);
// Initialize the Verify Time Table
_verifyTimeTable = new ClusterTable <DateTime>(
Enumerable.Range(_bytesUsedTable.ClusterAddresses.Last() + 1, clusterCount),
sizeof(long),
(address) => new VerifyTimesCluster(address, _geometry.BytesPerCluster, _volumeID));
_verifyTimeTable.Load(_clusterIO);
int l = _verifyTimeTable.ClusterAddresses.Last() + 1;
int[] cl = getClusterChain(l).ToArray();
// Initialize the Directory Table
_directoryTable = new MutableObjectClusterTable <Directory>(
getClusterChain(_verifyTimeTable.ClusterAddresses.Last() + 1),
Directory.StorageLength,
(address) => Directory.CreateArrayCluster(address));
_directoryTable.Load(_clusterIO);
// Initialize the File Table
_fileTable = new MutableObjectClusterTable <File>(
getClusterChain(_directoryTable.ClusterAddresses.First() + 1),
File.StorageLength,
(address) => File.CreateArrayCluster(address));
_fileTable.Load(_clusterIO);
// Initialize the Access Rules Table
_accessRules = new ClusterTable <SrfsAccessRule>(
getClusterChain(_fileTable.ClusterAddresses.First() + 1),
SrfsAccessRule.StorageLength + sizeof(bool),
(address) => SrfsAccessRule.CreateArrayCluster(address));
_accessRules.Load(_clusterIO);
// Initialize the Audit Rules Table
_auditRules = new ClusterTable <SrfsAuditRule>(
getClusterChain(_accessRules.ClusterAddresses.First() + 1),
SrfsAuditRule.StorageLength + sizeof(bool),
(address) => SrfsAuditRule.CreateArrayCluster(address));
_auditRules.Load(_clusterIO);
// Create the Indexes
for (int i = 0; i < _directoryTable.Count; i++)
{
Directory d = _directoryTable[i];
if (d != null)
{
_directoryIndex.Add(d.ID, i);
_containedDirectoriesIndex.Add(d.ID, new SortedList <string, Directory>(StringComparer.OrdinalIgnoreCase));
_containedFilesIndex.Add(d.ID, new SortedList <string, File>(StringComparer.OrdinalIgnoreCase));
_accessRulesIndex.Add(d.ID, new List <int>());
_auditRulesIndex.Add(d.ID, new List <int>());
}
}
foreach (var d in from d in _directoryTable where d != null && d.ParentID != Constants.NoID select d)
{
_containedDirectoriesIndex[d.ParentID].Add(d.Name, d);
}
for (int i = 0; i < _fileTable.Count; i++)
{
File f = _fileTable[i];
if (f != null)
{
_fileIndex.Add(f.ID, i);
_containedFilesIndex[f.ParentID].Add(f.Name, f);
_accessRulesIndex.Add(f.ID, new List <int>());
_auditRulesIndex.Add(f.ID, new List <int>());
}
}
for (int i = 0; i < _accessRules.Count; i++)
{
Data.SrfsAccessRule r = _accessRules[i];
if (r != null)
{
_accessRulesIndex[r.ID].Add(i);
}
}
for (int i = 0; i < _auditRules.Count; i++)
{
Data.SrfsAuditRule r = _auditRules[i];
if (r != null)
{
_auditRulesIndex[r.ID].Add(i);
}
}
// Update the next entry ID
_nextEntryID = Math.Max(
_directoryIndex.Keys.Max(),
_fileIndex.Count == 0 ? -1 : _fileIndex.Keys.Max()) + 1;
}