libnvme(2)

💖 libnvme(2) — the API Manual, bestie edition 💖

okay so you're deep in the libnvme API manual (yes, that's section 2, the library calls one, not the commands one) and you've landed on this little enum. it's giving very niche, very specific, very "you had to be there" — but i got you. let's get into it. 🦋

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✨ NAME ✨

enum nvme_id_ns_dpc — this field is literally the vibe check on whether your namespace can do end-to-end data protection. that's it, that's the whole job. 💅

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🌸 SYNOPSIS 🌸

enum nvme_id_ns_dpc {
    NVME_NS_DPC_PI_TYPE1 ,
    NVME_NS_DPC_PI_TYPE2 ,
    NVME_NS_DPC_PI_TYPE3 ,
    NVME_NS_DPC_PI_FIRST ,
    NVME_NS_DPC_PI_LAST

};

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🎀 Constants 🎀

each one of these is a little flag saying what your namespace can do. every single one starts with "If set, indicates that the namespace supports…" because they're all capability bits, bestie, they don't do anything on their own — they just tell you what's on the menu. 🍓

• NVME_NS_DPC_PI_TYPE1 — if this one's set, the namespace supports Protection Information Type 1. slay. 🔥
• NVME_NS_DPC_PI_TYPE2 — if this one's set, the namespace supports Protection Information Type 2. iconic. ✨
• NVME_NS_DPC_PI_TYPE3 — if this one's set, the namespace supports Protection Information Type 3. the trilogy is complete. 💜
• NVME_NS_DPC_PI_FIRST — if this one's set, the namespace supports protection information transferred as the first eight bytes of metadata. front of the line energy. 👑
• NVME_NS_DPC_PI_LAST — if this one's set, the namespace supports protection information transferred as the last eight bytes of metadata. back of the line, but make it fashion. 🎀

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💀 reminder to my beloved: these are capabilities. "If set" means you have to actually go look at the field before you assume anything. don't be out here manifesting features your namespace doesn't have. 🙈

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🫶 sign-off 🫶

that's the whole page, and honestly? ate. no crumbs. this one shipped with libnvme (2) as part of the API Manual, dated July 2026. go forth and protect your data end-to-end, bestie. periodt. 🌈💖