libnvme(2)

💖 libnvme(2) — okay bestie, let's talk struct nvme_mi_vpd_mr_common 💖

NVMe MultiRecord Area ✨ no cap, this is the little header+payload combo that the VPD (Vital Product Data) world uses to smuggle NVMe info around 💅

It lives in the libnvme API manual — yes, that libnvme, section 2, the icon it is 👑

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✨ SYNOPSIS ✨

struct nvme_mi_vpd_mr_common {
    __u8 type;
    __u8 rf;
    __u8 rlen;
    __u8 rchksum;
    __u8 hchksum;
    union {
      struct nvme_mi_vpd_mra nmra;
      struct nvme_mi_vpd_ppmra ppmra;
      struct nvme_mi_vpd_tra tmra;
    };
 };

copy that exactly, queen, the compiler does NOT forgive typos 😭

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🌸 Members 🌸

• type — the NVMe Record Type ID. like, which record are we even talking about, bestie? 🏷️
• rf — the Record Format. the shape/vibe of the record 🫶
• rlen — the Record Length. how much record you're getting, fr fr 📏
• rchksum — the Record Checksum. integrity check on the payload, we love a queen who verifies ✅
• hchksum — the Header Checksum. same energy but for the header instead 💖
• {unnamed_union} — anonymous 👻 (it's an unnamed union, so it's just... there. mysterious. main character energy tbh.)
• nmra — the NVMe MultiRecord Area ✨
• ppmra — the NVMe PCIe Port MultiRecord Area 🌈
• tmra — the Topology MultiRecord Area 🕸️

ngl bestie, those last three share one anonymous union, so it's one of them at a time — don't go reading nmra when the record is actually a tmra, that's giving undefined vibes 💀

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🦋 the vibe check

So basically: five little __u8 bytes of header (type, rf, rlen, rchksum, hchksum), and then one anonymous union holding whichever MultiRecord Area flavour applies — NVMe, NVMe PCIe Port, or Topology. That's the whole struct, periodt. 💅

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okay that's the whole page, mwah 🎀 this was the struct nvme_mi_vpd_mr_common page from the API Manual, shipped with libnvme, dated July 2026 — section libnvme(2), and yes the manpage footer said exactly that. stan. 💜