nvme_mi_msg_resp - Man Page

struct nvme_mi_msg_resp {
   struct nvme_mi_msg_hdr hdr;
   __u8 status;
   __u8 rsvd0[3];
};

hdr

the general request/response message header

status

response status value (see enum nvme_mi_resp_status)

rsvd0

reserved data, may be defined by specific response

Every response will start with one of these; command-specific responses will define parts of the reserved data, and may add further fields.