---
name: "nvme_mi_mi_req_hdr-libnvme3"
section: "2"
platform: "linux"
package: "nvme-cli"
version: "3.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nvme_mi_mi_req_hdr-libnvme3"
---

# nvme\_mi\_mi\_req\_hdr-libnvme3(2)

MI request message header.

## NAME

struct nvme\_mi\_mi\_req\_hdr - MI request message header.

## SYNOPSIS

struct nvme\_mi\_mi\_req\_hdr {\
     **struct nvme\_mi\_msg\_hdr hdr;**\
     **\_\_u8 opcode;**\
     **\_\_u8 rsvd0\[3\];**\
     **\_\_le32 cdw0, cdw1;**\
 };\

## Members

- hdr

  generic MI message header

- opcode

  opcode (OPC) for the specific MI command

- rsvd0

  reserved bytes

- cdw0

  Management Request Doubleword 0 - command specific usage

- cdw1

  Management Request Doubleword 1 - command specific usage

## Description

Wire format for MI request message headers, defined in section 5 of NVMe-MI.