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Windows Driver Kit DDI reference (ns-ntddscsi-_mpio_pass_through_path_direct_ex)

MPIO_PASS_THROUGH_PATH_DIRECT_EX structure

Description

The MPIO_PASS_THROUGH_PATH_DIRECT_EX structure is used together with an IOCTL_MPIO_PASS_THROUGH_PATH_DIRECT_EX request to instruct the port driver to send an embedded SCSI command to the target device.

Members

`PassThroughOffset`

The offset from the beginning of this structure to a SCSI_PASS_THROUGH_DIRECT_EX structure that is configured in the same manner as it is for an IOCTL_SCSI_PASS_THROUGH_DIRECT_EX request.

`Version`

Set to zero.

`Length`

The size of the MPIO_PASS_THROUGH_PATH_DIRECT_EX structure, in bytes.

`Flags`

Can be a mask of the following values:

MPIO_IOCTL_FLAG_USE_SCSIADDRESS OR MPIO_IOCTL_FLAG_USE_PATHID
MPIO_IOCTL_FLAG_INVOLVE_DSM

`PortNumber`

The port number if MPIO_IOCTL_FLAG_USE_SCSIADDRESS is set. Otherwise, this member is zero. If MPIO_IOCTL_FLAG_USE_SCSIADDRESS is set, the PathId and TargetId values are taken from the embedded SCSI_PASS_THROUGH_DIRECT_EX structure.

`MpioPathId`

The PathId for the real LUN. This value can be obtained by using a WMI request for the PDO_INFORMATION that is associated with the real LUN. This value is set only if MPIO_IOCTL_FLAG_USE_PATHID is set.

Remarks

[!NOTE] All 32-bit processes running on a 64-bit version of Windows must use the MPIO_PASS_THROUGH_PATH_DIRECT32_EX structure when issuing an IOCTL_MPIO_PASS_THROUGH_PATH_DIRECT_EX request.

MPIO_PASS_THROUGH_PATH_DIRECT_EX - NtDoc