internal IEnumerable <ComponentRecord> GetVolumeComponents(ulong volumeId)
{
foreach (var record in _records.Values)
{
if (record.RecordType == RecordType.Component)
{
ComponentRecord cmpntRecord = (ComponentRecord)record;
if (cmpntRecord.VolumeId == volumeId)
{
yield return(cmpntRecord);
}
}
}
}
private LogicalVolumeStatus GetComponentStatus(ComponentRecord cmpnt)
{
// NOTE: no support for RAID, so either valid or failed...
LogicalVolumeStatus status = LogicalVolumeStatus.Healthy;
foreach (var extent in _database.GetComponentExtents(cmpnt.Id))
{
DiskRecord disk = _database.GetDisk(extent.DiskId);
if (!_disks.ContainsKey(new Guid(disk.DiskGuidString)))
{
status = LogicalVolumeStatus.Failed;
break;
}
}
return(status);
}
private SparseStream OpenComponent(ComponentRecord component)
{
if (component.MergeType == ExtentMergeType.Concatenated)
{
List <ExtentRecord> extents = new List <ExtentRecord>(_database.GetComponentExtents(component.Id));
extents.Sort(CompareExtentOffsets);
// Sanity Check...
long pos = 0;
foreach (var extent in extents)
{
if (extent.OffsetInVolumeLba != pos)
{
throw new IOException("Volume extents are non-contiguous");
}
pos += extent.SizeLba;
}
List <SparseStream> streams = new List <SparseStream>();
foreach (var extent in extents)
{
streams.Add(OpenExtent(extent));
}
return(new ConcatStream(Ownership.Dispose, streams.ToArray()));
}
else if (component.MergeType == ExtentMergeType.Interleaved)
{
List <ExtentRecord> extents = new List <ExtentRecord>(_database.GetComponentExtents(component.Id));
extents.Sort(CompareExtentInterleaveOrder);
List <SparseStream> streams = new List <SparseStream>();
foreach (var extent in extents)
{
streams.Add(OpenExtent(extent));
}
return(new StripedStream(component.StripeSizeSectors * Sizes.Sector, Ownership.Dispose, streams.ToArray()));
}
else
{
throw new NotImplementedException("Unknown component mode: " + component.MergeType);
}
}
public static DatabaseRecord ReadFrom(byte[] buffer, int offset)
{
DatabaseRecord result = null;
if (Utilities.ToInt32BigEndian(buffer, offset + 0xC) != 0)
{
switch ((RecordType)(buffer[offset + 0x13] & 0xF))
{
case RecordType.Volume:
result = new VolumeRecord();
break;
case RecordType.Component:
result = new ComponentRecord();
break;
case RecordType.Extent:
result = new ExtentRecord();
break;
case RecordType.Disk:
result = new DiskRecord();
break;
case RecordType.DiskGroup:
result = new DiskGroupRecord();
break;
default:
throw new NotImplementedException("Unrecognized record type: " + buffer[offset + 0x13]);
}
result.DoReadFrom(buffer, offset);
}
return(result);
}