public async Task <InquiryResponse <T> > SendAsync <T>(InquiryCommand <T> inquiry,
CancellationToken cancellationToken = default)
{
CommandTask?commandTask = null;
// As we're using a bounded queue with limited capacity we can avoid the overhead
// of creating a command task until there is space
while (await _commandChannel.Writer.WaitToWriteAsync(cancellationToken).ConfigureAwait(false))
{
commandTask ??= new CommandTask(inquiry, cancellationToken);
if (_commandChannel.Writer.TryWrite(commandTask))
{
// We are queued
return((InquiryResponse <T>) await commandTask.TaskCompletionSource.Task.ConfigureAwait(false));
}
}
// Failed to get writer at all
return((InquiryResponse <T>)inquiry.UnknownResponse);
}
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);
}
