public static void ExtendRAID5Volume(DiskGroupDatabase database, Raid5Volume volume, long numberOfAdditionalExtentSectors)
{
if (numberOfAdditionalExtentSectors % volume.SectorsPerStripe > 0)
{
throw new ArgumentException("Number of additional sectors must be multiple of stripes per sector");
}
List <DatabaseRecord> records = new List <DatabaseRecord>();
VolumeRecord volumeRecord = database.FindVolumeByVolumeGuid(volume.VolumeGuid);
volumeRecord = (VolumeRecord)volumeRecord.Clone();
volumeRecord.SizeLBA += (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(numberOfAdditionalExtentSectors * (volume.NumberOfColumns - 1), volume.BytesPerSector);
records.Add(volumeRecord);
foreach (DynamicColumn column in volume.Columns)
{
DynamicDiskExtent lastExtent = column.Extents[column.Extents.Count - 1];
ExtentRecord extentRecord = database.FindExtentByExtentID(lastExtent.ExtentID);
extentRecord = (ExtentRecord)extentRecord.Clone();
extentRecord.SizeLBA += (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(numberOfAdditionalExtentSectors, volume.BytesPerSector);
records.Add(extentRecord);
DiskRecord diskRecord = database.FindDiskByDiskID(extentRecord.DiskId); // we should update the disk, see Database.cs
diskRecord = (DiskRecord)diskRecord.Clone();
records.Add(diskRecord);
}
database.UpdateDatabase(records);
}
/// <summary>
/// Update the database to point to the new extent location (same or different disk)
/// </summary>
public static void UpdateExtentLocation(DiskGroupDatabase database, DynamicVolume volume, DynamicDiskExtent relocatedExtent)
{
PrivateHeader privateHeader = PrivateHeader.ReadFromDisk(relocatedExtent.Disk);
DiskRecord targetDiskRecord = database.FindDiskByDiskGuid(privateHeader.DiskGuid);
VolumeRecord volumeRecord = database.FindVolumeByVolumeGuid(volume.VolumeGuid);
List <DatabaseRecord> records = new List <DatabaseRecord>();
ExtentRecord sourceExtentRecord = database.FindExtentByExtentID(relocatedExtent.ExtentID);
ExtentRecord relocatedExtentRecord = (ExtentRecord)sourceExtentRecord.Clone();
relocatedExtentRecord.DiskId = targetDiskRecord.DiskId;
relocatedExtentRecord.DiskOffsetLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionLBA(relocatedExtent.FirstSector, privateHeader);
records.Add(relocatedExtentRecord);
// we should update the disk records
foreach (DynamicDiskExtent extent in volume.Extents)
{
DiskRecord diskRecord = database.FindDiskByDiskID(relocatedExtentRecord.DiskId);
// there could be multiple extents on the same disk, make sure we only add each disk once
if (!records.Contains(diskRecord))
{
diskRecord = (DiskRecord)diskRecord.Clone();
records.Add(diskRecord);
}
}
// when moving to a new disk, we should update the new disk record as well
if (!records.Contains(targetDiskRecord))
{
records.Add(targetDiskRecord.Clone());
}
database.UpdateDatabase(records);
}
public static ulong CreateSimpleVolume(DiskGroupDatabase database, DiskExtent extent)
{
List <DatabaseRecord> records = new List <DatabaseRecord>();
VolumeRecord volumeRecord = new VolumeRecord();
volumeRecord.Id = database.AllocateNewRecordID();
volumeRecord.Name = GetNextSimpleVolumeName(database.VolumeRecords);
volumeRecord.VolumeTypeString = "gen";
volumeRecord.StateString = "ACTIVE";
volumeRecord.ReadPolicy = ReadPolicyName.Select;
volumeRecord.VolumeNumber = GetNextVolumeNumber(database.VolumeRecords);
volumeRecord.VolumeFlags = VolumeFlags.Writeback | VolumeFlags.DefaultUnknown;
volumeRecord.NumberOfComponents = 1;
volumeRecord.SizeLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(extent.TotalSectors, extent.BytesPerSector);
volumeRecord.PartitionType = PartitionType.RAW;
volumeRecord.VolumeGuid = Guid.NewGuid();
records.Add(volumeRecord);
ComponentRecord componentRecord = new ComponentRecord();
componentRecord.Id = database.AllocateNewRecordID();
componentRecord.Name = volumeRecord.Name + "-01";
componentRecord.StateString = "ACTIVE";
componentRecord.ExtentLayout = ExtentLayoutName.Concatenated;
componentRecord.NumberOfExtents = 1;
componentRecord.VolumeId = volumeRecord.VolumeId;
componentRecord.HasStripedExtentsFlag = false;
componentRecord.NumberOfColumns = 0;
records.Add(componentRecord);
// we should update the disk record
PrivateHeader privateHeader = PrivateHeader.ReadFromDisk(extent.Disk);
DiskRecord diskRecord = database.FindDiskByDiskGuid(privateHeader.DiskGuid);
diskRecord = (DiskRecord)diskRecord.Clone();
records.Add(diskRecord);
ExtentRecord extentRecord = new ExtentRecord();
extentRecord.Name = GetNextExtentName(database.ExtentRecords, diskRecord.Name);
extentRecord.DiskOffsetLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionLBA(extent.FirstSector, privateHeader);
extentRecord.SizeLBA = volumeRecord.SizeLBA;
extentRecord.ComponentId = componentRecord.ComponentId;
extentRecord.DiskId = diskRecord.DiskId;
extentRecord.HasColumnIndexFlag = false;
records.Add(extentRecord);
database.UpdateDatabase(records);
return(volumeRecord.VolumeId);
}
private static StripedVolume GetStripedVolume(DiskGroupDatabase database, ComponentRecord componentRecord, VolumeRecord volumeRecord)
{
List <DynamicColumn> columns = GetDynamicVolumeColumns(database, componentRecord, volumeRecord);
int bytesPerSector = DynamicVolume.GetBytesPerSector(columns, DynamicColumn.DefaultBytesPerSector);
int sectorsPerStripe = (int)PublicRegionHelper.TranslateFromPublicRegionSizeLBA((int)componentRecord.StripeSizeLBA, bytesPerSector);
StripedVolume volume = new StripedVolume(columns, sectorsPerStripe, volumeRecord.VolumeGuid, database.DiskGroupGuid);
volume.VolumeID = volumeRecord.VolumeId;
volume.Name = volumeRecord.Name;
volume.DiskGroupName = database.DiskGroupName;
return(volume);
}
/// <summary>
/// Support null disks
/// </summary>
public static long GetExtentStartSector(DynamicDisk disk, ExtentRecord extentRecord)
{
long publicRegionStartLBA = 0;
int bytesPerDiskSector = DynamicColumn.DefaultBytesPerSector; // default for missing disks
if (disk != null)
{
bytesPerDiskSector = disk.BytesPerSector;
PrivateHeader privateHeader = disk.PrivateHeader;
publicRegionStartLBA = (long)privateHeader.PublicRegionStartLBA;
}
return(PublicRegionHelper.TranslateFromPublicRegionLBA((long)extentRecord.DiskOffsetLBA, publicRegionStartLBA, bytesPerDiskSector));
}
public static void ExtendSimpleVolume(DiskGroupDatabase database, SimpleVolume volume, long numberOfAdditionalSectors)
{
VolumeRecord volumeRecord = database.FindVolumeByVolumeGuid(volume.VolumeGuid);
volumeRecord = (VolumeRecord)volumeRecord.Clone();
volumeRecord.SizeLBA += (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(numberOfAdditionalSectors, volume.BytesPerSector);
ExtentRecord extentRecord = database.FindExtentByExtentID(volume.DiskExtent.ExtentID);
extentRecord = (ExtentRecord)extentRecord.Clone();
extentRecord.SizeLBA += (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(numberOfAdditionalSectors, volume.BytesPerSector);
DiskRecord diskRecord = database.FindDiskByDiskID(extentRecord.DiskId); // we should update the disk, see Database.cs
diskRecord = (DiskRecord)diskRecord.Clone();
List <DatabaseRecord> records = new List <DatabaseRecord>();
records.Add(volumeRecord);
records.Add(extentRecord);
records.Add(diskRecord);
database.UpdateDatabase(records);
}
/// <summary>
/// Update the database (add the new extent)
/// </summary>
/// <param name="volume">RAID-5 or striped volume</param>
/// <returns>new extent ID</returns>
public static ulong AddNewExtentToVolume(DiskGroupDatabase database, DynamicVolume volume, DiskExtent newExtent)
{
PrivateHeader privateHeader = PrivateHeader.ReadFromDisk(newExtent.Disk);
List <DatabaseRecord> records = new List <DatabaseRecord>();
VolumeRecord volumeRecord = database.FindVolumeByVolumeGuid(volume.VolumeGuid);
if (volumeRecord == null)
{
throw new MissingDatabaseRecordException("Volume record is missing");
}
volumeRecord = (VolumeRecord)volumeRecord.Clone();
volumeRecord.SizeLBA += (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(newExtent.TotalSectors, privateHeader);
records.Add(volumeRecord);
ComponentRecord componentRecord = database.FindComponentsByVolumeID(volumeRecord.VolumeId)[0];
if (componentRecord == null)
{
throw new MissingDatabaseRecordException("Component record is missing");
}
componentRecord = (ComponentRecord)componentRecord.Clone();
componentRecord.NumberOfExtents++;
componentRecord.NumberOfColumns++;
records.Add(componentRecord);
DiskRecord diskRecord = database.FindDiskByDiskGuid(privateHeader.DiskGuid);
if (diskRecord == null)
{
throw new MissingDatabaseRecordException("Disk record is missing");
}
diskRecord = (DiskRecord)diskRecord.Clone();
records.Add(diskRecord);
ExtentRecord newExtentRecord = new ExtentRecord();
newExtentRecord.Name = GetNextExtentName(database.ExtentRecords, diskRecord.Name);
newExtentRecord.ComponentId = componentRecord.ComponentId;
newExtentRecord.DiskId = diskRecord.DiskId;
newExtentRecord.DiskOffsetLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionLBA(newExtent.FirstSector, privateHeader);
newExtentRecord.SizeLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(newExtent.TotalSectors, privateHeader);
newExtentRecord.HasColumnIndexFlag = true;
newExtentRecord.ColumnIndex = (uint)volume.Columns.Count; // zero based
records.Add(newExtentRecord);
// we should update the disk records and extent records
foreach (DynamicDiskExtent extent in volume.Extents)
{
ExtentRecord extentRecord = database.FindExtentByExtentID(extent.ExtentID);
if (extentRecord == null)
{
throw new MissingDatabaseRecordException("Extent record is missing");
}
extentRecord = (ExtentRecord)extentRecord.Clone();
records.Add(extentRecord);
diskRecord = database.FindDiskByDiskID(extentRecord.DiskId);
if (diskRecord == null)
{
throw new MissingDatabaseRecordException("Disk record is missing");
}
// there could be multiple extents on the same disk, make sure we only add each disk once
if (!records.Contains(diskRecord))
{
diskRecord = (DiskRecord)diskRecord.Clone();
records.Add(diskRecord);
}
}
database.UpdateDatabase(records);
return(newExtentRecord.ExtentId);
}
public static ulong CreateRAID5Volume(DiskGroupDatabase database, List <DiskExtent> extents, bool isDegraded)
{
int numberOfColumns;
if (isDegraded)
{
numberOfColumns = extents.Count + 1;
}
else
{
numberOfColumns = extents.Count;
}
List <DatabaseRecord> records = new List <DatabaseRecord>();
VolumeRecord volumeRecord = new VolumeRecord();
volumeRecord.Id = database.AllocateNewRecordID();
volumeRecord.Name = GetNextRAIDVolumeName(database.VolumeRecords);
volumeRecord.VolumeTypeString = "raid5";
volumeRecord.StateString = "ACTIVE";
volumeRecord.ReadPolicy = ReadPolicyName.RAID;
volumeRecord.VolumeNumber = GetNextVolumeNumber(database.VolumeRecords);
volumeRecord.VolumeFlags = VolumeFlags.Writeback | VolumeFlags.Writecopy | VolumeFlags.DefaultUnknown;
volumeRecord.NumberOfComponents = 1;
volumeRecord.SizeLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(extents[0].TotalSectors * (numberOfColumns - 1), extents[0].BytesPerSector);
volumeRecord.PartitionType = PartitionType.RAW;
volumeRecord.VolumeGuid = Guid.NewGuid();
records.Add(volumeRecord);
ComponentRecord componentRecord = new ComponentRecord();
componentRecord.Id = database.AllocateNewRecordID();
componentRecord.Name = volumeRecord.Name + "-01";
componentRecord.StateString = "ACTIVE";
componentRecord.ExtentLayout = ExtentLayoutName.RAID5;
componentRecord.NumberOfExtents = (uint)numberOfColumns;
componentRecord.VolumeId = volumeRecord.VolumeId;
componentRecord.HasStripedExtentsFlag = true;
componentRecord.StripeSizeLBA = 128; // 64KB - the default
componentRecord.NumberOfColumns = (uint)numberOfColumns;
records.Add(componentRecord);
for (int index = 0; index < extents.Count; index++)
{
DiskExtent extent = extents[index];
// we should update the disk records
PrivateHeader privateHeader = PrivateHeader.ReadFromDisk(extent.Disk);
DiskRecord diskRecord = database.FindDiskByDiskGuid(privateHeader.DiskGuid);
diskRecord = (DiskRecord)diskRecord.Clone();
records.Add(diskRecord);
ExtentRecord extentRecord = new ExtentRecord();
extentRecord.Name = GetNextExtentName(database.ExtentRecords, diskRecord.Name);
extentRecord.DiskOffsetLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionLBA(extent.FirstSector, privateHeader);
extentRecord.SizeLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(extent.TotalSectors, extent.BytesPerSector);
extentRecord.ComponentId = componentRecord.ComponentId;
extentRecord.DiskId = diskRecord.DiskId;
extentRecord.HasColumnIndexFlag = (index > 0);
extentRecord.ColumnIndex = (uint)index; // zero based
records.Add(extentRecord);
}
if (isDegraded)
{
// we have to make-up a disk
// The DiskFlags and ExtentFlags are not necessary (they will be added later anyway when the disk group is reimported)
DiskRecord diskRecord = new DiskRecord();
diskRecord.Id = database.AllocateNewRecordID();
diskRecord.Name = "Miss" + new Random().Next(100);
diskRecord.DiskGuid = Guid.NewGuid();
diskRecord.DiskFlags = DiskFlags.Detached;
records.Add(diskRecord);
ExtentRecord extentRecord = new ExtentRecord();
extentRecord.Name = diskRecord.Name + "-01";
extentRecord.ExtentFlags = ExtentFlags.Recover;
extentRecord.SizeLBA = (ulong)PublicRegionHelper.TranslateToPublicRegionSizeLBA(extents[0].TotalSectors, extents[0].BytesPerSector);
extentRecord.ComponentId = componentRecord.ComponentId;
extentRecord.DiskId = diskRecord.DiskId;
extentRecord.HasColumnIndexFlag = true;
extentRecord.ColumnIndex = (uint)extents.Count; // zero based
records.Add(extentRecord);
}
database.UpdateDatabase(records);
return(volumeRecord.VolumeId);
}