2.2.4.7 SVHDX_TUNNEL_SCSI_REQUEST Structure

The SVHDX_TUNNEL_SCSI_REQUEST packet is sent by the client to process the SCSI request.

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
Length																Reserved1
CDBLength								SenseInfoExLength								Disposition								Reserved2
SrbFlags
DataTransferLength
CDBBuffer
...
...
...
Reserved3
DataBuffer (variable)
...

Length (2 bytes): Specifies the size, in bytes, of the SVHDX_TUNNEL_SCSI_REQUEST structure excluding the DataBuffer field. This field MUST be set to 36.

Reserved1 (2 byte): The client MUST set this field to zero.

CDBLength (1 byte): The length, in bytes, of the SCSI command descriptor block (CDB). This value MUST be less than or equal to RSVD_CDB_GENERIC_LENGTH.

SenseInfoExLength (1 byte): This field SHOULD be set to 20 and the server MUST ignore it on receipt.

Disposition (1 byte): This field indicates the SCSI CDB transfer type and MUST be set to one of the following values:

Value	Meaning
0x00	Indicates that data is being requested from the virtual SCSI disk
0x01	Indicates that data is being sent to the virtual SCSI disk
0x02	Indicates that data is neither being requested nor sent

Reserved2 (1 byte): This field MUST be set to 0x00.

SrbFlags (4 bytes): An optional, application-provided flag to indicate the options of the SCSI request. This field MUST contain zero or more of the following values:

Name	Meaning
SRB_FLAGS_DATA_IN 0x00000040	The application is sending data to the server
SRB_FLAGS_DATA_OUT 0x00000080	The application is requesting data from the server

DataTransferLength (4 bytes): The length, in bytes, of the additional data placed in the DataBuffer field.

CDBBuffer (16 bytes): A buffer that contains the SCSI CDB.

Reserved3 (4 bytes): This field MUST be set to 0x00000000.

DataBuffer (variable): A variable-length buffer that contains the additional buffer, as described by the DataTransferLength field.