libnvme(2)

💖 NAME 💖

okay bestie, welcome to the libnvme manual page for struct nvme_host_metadata — aka the Host Metadata Data Structure. yes it's real, yes you need it, and yes we're gonna get through it together 🫶

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✨ SYNOPSIS ✨

here's the exact shape of it, no edits, no vibes-based paraphrasing:

struct nvme_host_metadata {
    __u8 ndesc;
    __u8 rsvd1;
    union {
      struct nvme_metadata_element_desc descs[0];
      __u8 descs_buf[4094];
    };
 };

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🎀 Members 🎀

so. the members. let's go one by one, bestie, we're not skipping anybody 💅

• ndesc — this is a __u8 and it's the number of metadata element descriptors. that's it, that's the whole job. main character energy honestly 👑
• rsvd1 — also a __u8, and it's Reserved. so like... don't touch it. it's reserved. it's not for you. it's giving "do not perceive me" 🙈
• {unnamed_union} — the anonymous union. no name. mysterious. lowkey iconic in a "i have no identity" kinda way 🦋
• descs — the metadata element descriptors themselves, declared as struct nvme_metadata_element_desc descs[0]; inside that anonymous union 🔥
• descs_buf — the metadata element descriptor buffer, __u8 descs_buf[4094];, sharing that same union space with descs 🌸

not me pointing out that descs and descs_buf live in the same union so they're overlapping the same memory, and one of them is literally a zero-length array, iykyk 💀

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and that's the whole page, bestie! this was struct nvme_host_metadata from the libnvme API Manual, stamped July 2026 ⭐ go forth and descriptor-element responsibly, ily, bye 🧚💜