public SCSIStatusCodeName Verify(LUNStructure lun, out byte[] response)
{
if (lun >= m_disks.Count)
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
response = new byte[0];
return(SCSIStatusCodeName.Good);
}
public SCSIStatusCodeName ReadCapacity10(LUNStructure lun, out byte[] response)
{
if (lun >= m_disks.Count)
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
ReadCapacity10Parameter parameter = new ReadCapacity10Parameter(m_disks[lun].Size, (uint)m_disks[lun].BytesPerSector);
response = parameter.GetBytes();
return(SCSIStatusCodeName.Good);
}
public SCSIStatusCodeName ReadCapacity16(LUNStructure lun, uint allocationLength, out byte[] response)
{
if (lun >= m_disks.Count)
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
ReadCapacity16Parameter parameter = new ReadCapacity16Parameter(m_disks[lun].Size, (uint)m_disks[lun].BytesPerSector);
response = parameter.GetBytes();
// we must not return more bytes than ReadCapacity16.AllocationLength
if (response.Length > allocationLength)
{
response = ByteReader.ReadBytes(response, 0, (int)allocationLength);
}
return(SCSIStatusCodeName.Good);
}
public SCSIStatusCodeName Read(SCSICommandDescriptorBlock command, LUNStructure lun, out byte[] response)
{
if (lun >= m_disks.Count)
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
Disk disk = m_disks[lun];
int sectorCount = (int)command.TransferLength;
try
{
lock (IOLock)
{
response = disk.ReadSectors((long)command.LogicalBlockAddress64, sectorCount);
}
return(SCSIStatusCodeName.Good);
}
catch (ArgumentOutOfRangeException)
{
ISCSIServer.Log("[Read] Read error: LBA out of range");
response = FormatSenseData(SenseDataParameter.GetIllegalRequestLBAOutOfRangeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
catch (IOException ex)
{
int error = Marshal.GetHRForException(ex);
if (error == (int)Win32Error.ERROR_CRC)
{
ISCSIServer.Log("[Read] Read error: CRC error");
response = FormatSenseData(SenseDataParameter.GetWriteFaultSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
else
{
ISCSIServer.Log("[Read] Read error: {0}", ex.ToString());
response = FormatSenseData(SenseDataParameter.GetMediumErrorUnrecoverableReadErrorSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
}
}
public SCSIStatusCodeName Write(SCSICommandDescriptorBlock command, LUNStructure lun, byte[] data, out byte[] response)
{
if (lun >= m_disks.Count)
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
Disk disk = m_disks[lun];
if (disk.IsReadOnly)
{
SenseDataParameter senseData = SenseDataParameter.GetDataProtectSenseData();
response = senseData.GetBytes();
return(SCSIStatusCodeName.CheckCondition);
}
try
{
lock (IOLock)
{
disk.WriteSectors((long)command.LogicalBlockAddress64, data);
}
response = new byte[0];
return(SCSIStatusCodeName.Good);
}
catch (ArgumentOutOfRangeException)
{
ISCSIServer.Log("[Write] Write error: LBA out of range");
response = FormatSenseData(SenseDataParameter.GetIllegalRequestLBAOutOfRangeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
catch (IOException ex)
{
ISCSIServer.Log("[Write] Write error: {0}", ex.ToString());
response = FormatSenseData(SenseDataParameter.GetMediumErrorWriteFaultSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
}
/// <summary>
/// This takes the iSCSI command and forwards it to a SCSI Passthrough device. It then returns the response.
/// </summary>
public override SCSIStatusCodeName ExecuteCommand(byte[] commandBytes, LUNStructure lun, byte[] data, out byte[] response)
{
// SPTI only supports up to 16 byte CDBs
if (commandBytes.Length > SCSI_PASS_THROUGH_DIRECT.CdbBufferLength)
{
response = VirtualSCSITarget.FormatSenseData(SenseDataParameter.GetIllegalRequestUnsupportedCommandCodeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
if (commandBytes[0] == (byte)SCSIOpCodeName.ReportLUNs)
{
if (m_emulateReportLUNs)
{
Log(Severity.Verbose, "SCSI Command: ReportLUNs");
ReportLUNsParameter parameter = new ReportLUNsParameter();
parameter.LUNList.Add(0);
response = parameter.GetBytes();
if (m_logicalUnitManager.FindLogicalUnit(0) == null)
{
m_logicalUnitManager.AddLogicalUnit(new LogicalUnit());
}
return(SCSIStatusCodeName.Good);
}
else
{
return(ReportLUNs(out response));
}
}
LogicalUnit logicalUnit = m_logicalUnitManager.FindLogicalUnit((byte)lun);
if (logicalUnit == null)
{
response = VirtualSCSITarget.FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
// Pad all CDBs to 16 bytes
Array.Resize(ref commandBytes, SCSI_PASS_THROUGH_DIRECT.CdbBufferLength);
// Build SCSI Passthrough structure
SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER scsi = BuildSCSIPassThroughStructure(commandBytes, logicalUnit, data);
if (scsi == null)
{
response = VirtualSCSITarget.FormatSenseData(SenseDataParameter.GetIllegalRequestUnsupportedCommandCodeSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
uint bytesReturned;
IntPtr inBuffer = inBuffer = Marshal.AllocHGlobal(Marshal.SizeOf(scsi));
uint size = (uint)Marshal.SizeOf(scsi);
Marshal.StructureToPtr(scsi, inBuffer, true);
// Forward SCSI command to target
SCSIStatusCodeName status;
if (!DeviceIoControl(m_handle, IOCTL_SCSI_PASS_THROUGH_DIRECT, inBuffer, size, IntPtr.Zero, 0, out bytesReturned, IntPtr.Zero))
{
// Notes:
// 1. DeviceIoControl will return ERROR_INVALID_HANDLE under Windows Vista or later if not running as administrator.
// 2. If a device class driver has claimed the device then passthrough IOCTLs must go through the device class driver.
// Sending IOCTLs to the port driver will return ERROR_INVALID_FUNCTION in such cases.
// To work with an HBA one can disable the disk drivers of disks connected to that HBA.
Win32Error lastError = (Win32Error)Marshal.GetLastWin32Error();
Log(Severity.Error, "DeviceIoControl/IOCTL_SCSI_PASS_THROUGH_DIRECT error: {0}, Device path: {1}", lastError, m_path);
response = VirtualSCSITarget.FormatSenseData(SenseDataParameter.GetIllegalRequestUnsupportedCommandCodeSenseData());
status = SCSIStatusCodeName.CheckCondition;
}
else
{
Marshal.PtrToStructure(inBuffer, scsi);
status = (SCSIStatusCodeName)scsi.Spt.ScsiStatus;
if (status != SCSIStatusCodeName.Good)
{
Log(Severity.Verbose, "SCSI Status: {0}, Sense: {1}", status, BitConverter.ToString(scsi.Sense));
response = new byte[scsi.Sense.Length + 2];
BigEndianWriter.WriteUInt16(response, 0, (ushort)scsi.Sense.Length);
ByteWriter.WriteBytes(response, 2, scsi.Sense);
}
else
{
if (scsi.Spt.DataTransferLength > 0)
{
if (scsi.Spt.DataIn == (byte)SCSIDataDirection.In)
{
response = new byte[scsi.Spt.DataTransferLength];
Marshal.Copy(scsi.Spt.DataBuffer, response, 0, response.Length);
}
else
{
response = new byte[0];
}
Log(Severity.Verbose, "SCSI Status: {0}, Response Length: {1}", status, response.Length);
if (commandBytes[0] == (byte)SCSIOpCodeName.Inquiry)
{
InterceptInquiry(logicalUnit, commandBytes, response);
}
else if (commandBytes[0] == (byte)SCSIOpCodeName.ModeSelect6)
{
InterceptModeSelect6(logicalUnit, commandBytes, data);
}
else if (commandBytes[0] == (byte)SCSIOpCodeName.ModeSense6)
{
InterceptModeSense6(logicalUnit, commandBytes, response);
}
else if (commandBytes[0] == (byte)SCSIOpCodeName.ReadCapacity10)
{
InterceptReadCapacity10(logicalUnit, commandBytes, response);
}
else if (commandBytes[0] == (byte)SCSIOpCodeName.ModeSelect10)
{
InterceptModeSelect10(logicalUnit, commandBytes, data);
}
else if (commandBytes[0] == (byte)SCSIOpCodeName.ModeSense10)
{
InterceptModeSense10(logicalUnit, commandBytes, response);
}
else if (commandBytes[0] == (byte)SCSIOpCodeName.ServiceActionIn16 && commandBytes[1] == (byte)ServiceAction.ReadCapacity16)
{
InterceptReadCapacity16(logicalUnit, commandBytes, response);
}
}
else
{
// SPTI request was GOOD, no data in response buffer.
response = new byte[0];
Log(Severity.Verbose, "SCSI Status: {0}", status);
}
}
}
Marshal.FreeHGlobal(inBuffer);
if (scsi.Spt.DataBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(scsi.Spt.DataBuffer);
}
return(status);
}
public SCSIStatusCodeName ModeSense6(ModeSense6CommandDescriptorBlock command, LUNStructure lun, out byte[] response)
{
if (lun >= m_disks.Count)
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
ISCSIServer.Log("[ModeSense6] Page code: 0x{0}, Sub page code: 0x{1}", command.PageCode.ToString("X"), command.SubpageCode.ToString("X"));
byte[] pageData;
switch ((ModePageCodeName)command.PageCode)
{
case ModePageCodeName.CachingParametersPage:
{
CachingParametersPage page = new CachingParametersPage();
page.RCD = true;
pageData = page.GetBytes();
break;
}
case ModePageCodeName.ControlModePage:
{
ControlModePage page = new ControlModePage();
pageData = page.GetBytes();
break;
}
case ModePageCodeName.PowerConditionModePage:
{
if (command.SubpageCode == 0x00)
{
PowerConditionModePage page = new PowerConditionModePage();
pageData = page.GetBytes();
break;
}
else if (command.SubpageCode == 0x01)
{
PowerConsumptionModePage page = new PowerConsumptionModePage();
pageData = page.GetBytes();
break;
}
else
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidFieldInCDBSenseData());
ISCSIServer.Log("[ModeSense6] Power condition subpage 0x{0} is not implemented", command.SubpageCode.ToString("x"));
return(SCSIStatusCodeName.CheckCondition);
}
}
case ModePageCodeName.InformationalExceptionsControlModePage:
{
InformationalExceptionsControlModePage page = new InformationalExceptionsControlModePage();
pageData = page.GetBytes();
break;
}
case ModePageCodeName.ReturnAllPages:
{
CachingParametersPage page1 = new CachingParametersPage();
page1.RCD = true;
InformationalExceptionsControlModePage page2 = new InformationalExceptionsControlModePage();
pageData = new byte[page1.Length + page2.Length];
Array.Copy(page1.GetBytes(), pageData, page1.Length);
Array.Copy(page2.GetBytes(), 0, pageData, page1.Length, page2.Length);
break;
}
case ModePageCodeName.VendorSpecificPage:
{
// Microsoft iSCSI Target running under Windows 2000 will request this page, we immitate Microsoft iSCSI Target by sending back an empty page
VendorSpecificPage page = new VendorSpecificPage();
pageData = page.GetBytes();
break;
}
default:
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidFieldInCDBSenseData());
ISCSIServer.Log("[ModeSense6] ModeSense6 page 0x{0} is not implemented", command.PageCode.ToString("x"));
return(SCSIStatusCodeName.CheckCondition);
}
}
ModeParameterHeader6 header = new ModeParameterHeader6();
header.WP = m_disks[lun].IsReadOnly; // Write protected, even when set to true, Windows does not always prevent the disk from being written to.
header.DPOFUA = true; // Microsoft iSCSI Target support this
byte[] descriptorBytes = new byte[0];
if (!command.DBD)
{
ShortLBAModeParameterBlockDescriptor descriptor = new ShortLBAModeParameterBlockDescriptor();
descriptor.LogicalBlockLength = (uint)m_disks[lun].BytesPerSector;
descriptorBytes = descriptor.GetBytes();
}
header.BlockDescriptorLength = (byte)descriptorBytes.Length;
header.ModeDataLength += (byte)(descriptorBytes.Length + pageData.Length);
response = new byte[1 + header.ModeDataLength];
Array.Copy(header.GetBytes(), 0, response, 0, header.Length);
Array.Copy(descriptorBytes, 0, response, header.Length, descriptorBytes.Length);
Array.Copy(pageData, 0, response, header.Length + descriptorBytes.Length, pageData.Length);
return(SCSIStatusCodeName.Good);
}
public SCSIStatusCodeName Inquiry(InquiryCommand command, LUNStructure lun, out byte[] response)
{
if (lun >= m_disks.Count)
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidLUNSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
if (!command.EVPD)
{
if ((int)command.PageCode == 0)
{
StandardInquiryData inquiryData = new StandardInquiryData();
inquiryData.PeripheralDeviceType = 0; // Direct access block device
inquiryData.VendorIdentification = "TalAloni";
inquiryData.ProductIdentification = "iSCSI Disk " + ((ushort)lun).ToString();
inquiryData.ProductRevisionLevel = "1.00";
inquiryData.DriveSerialNumber = 0;
inquiryData.CmdQue = true;
inquiryData.Version = 5; // Microsoft iSCSI Target report version 5
if (this is ISCSITarget)
{
inquiryData.VersionDescriptors.Add(0x0960); // iSCSI
}
response = inquiryData.GetBytes();
}
else
{
ISCSIServer.Log("[Inquiry] Invalid request");
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidFieldInCDBSenseData());
return(SCSIStatusCodeName.CheckCondition);
}
}
else
{
ISCSIServer.Log("[Inquiry] Page code: 0x{0}", command.PageCode.ToString("X"));
switch (command.PageCode)
{
case VitalProductDataPageName.SupportedVPDPages:
{
SupportedVitaLProductDataPages page = new SupportedVitaLProductDataPages();
page.SupportedPageList.Add((byte)VitalProductDataPageName.SupportedVPDPages);
page.SupportedPageList.Add((byte)VitalProductDataPageName.UnitSerialNumber);
page.SupportedPageList.Add((byte)VitalProductDataPageName.DeviceIdentification);
response = page.GetBytes();
break;
}
case VitalProductDataPageName.UnitSerialNumber:
{
UnitSerialNumberVPDPage page = new UnitSerialNumberVPDPage();
// Older products that only support the Product Serial Number parameter will have a page length of 08h, while newer products that support both parameters (Vendor Unique field from the StandardInquiryData) will have a page length of 14h
// Microsoft iSCSI Target uses values such as "34E5A6FC-3ACC-452D-AEDA-6EE2EFF20FB4"
ulong serialNumber = 0;
page.ProductSerialNumber = serialNumber.ToString("00000000");
response = page.GetBytes();
break;
}
case VitalProductDataPageName.DeviceIdentification:
{
DeviceIdentificationVPDPage page = new DeviceIdentificationVPDPage();
// NAA identifier is needed to prevent 0xF4 BSOD during Windows setup
page.IdentificationDescriptorList.Add(IdentificationDescriptor.GetNAAExtendedIdentifier(5, lun));
if (this is ISCSITarget)
{
// ISCSI identifier is needed for WinPE to pick up the disk during boot (after iPXE's sanhook)
page.IdentificationDescriptorList.Add(IdentificationDescriptor.GetSCSINameStringIdentifier(((ISCSITarget)this).TargetName));
}
response = page.GetBytes();
break;
}
case VitalProductDataPageName.BlockLimits:
{
/* Provide only when requeste explicitly */
BlockLimitsVPDPage page = new BlockLimitsVPDPage();
page.OptimalTransferLengthGranularity = 128;
page.MaximumTransferLength = (uint)DiskAccessLibrary.Settings.MaximumTransferSizeLBA;
page.OptimalTransferLength = 128;
response = page.GetBytes();
break;
}
case VitalProductDataPageName.BlockDeviceCharacteristics:
{
/* Provide only when requeste explicitly */
BlockDeviceCharacteristicsVPDPage page = new BlockDeviceCharacteristicsVPDPage();
page.MediumRotationRate = 0; // Not reported
response = page.GetBytes();
break;
}
default:
{
response = FormatSenseData(SenseDataParameter.GetIllegalRequestInvalidFieldInCDBSenseData());
ISCSIServer.Log("[Inquiry] Unsupported VPD Page request (0x{0})", command.PageCode.ToString("X"));
return(SCSIStatusCodeName.CheckCondition);
}
}
}
// we must not return more bytes than InquiryCommand.AllocationLength
if (response.Length > command.AllocationLength)
{
response = ByteReader.ReadBytes(response, 0, command.AllocationLength);
}
return(SCSIStatusCodeName.Good);
}