libnvme(2)

💖 NAME 💖

struct nvme_ns_id_desc — the Namespace Identifier Type descriptor, bestie. It's the glow-up little struct that tells you what kind of namespace ID you're looking at and how long it is. She's giving "ID card but make it NVMe" 🪪✨

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🌸 SYNOPSIS 🌸

struct nvme_ns_id_desc {
    __u8 nidt;
    __u8 nidl;
    __le16 rsvd;
    __u8 nid[];
};

okay so it's a tiny header followed by a flexible array and honestly? iconic. periodt 💅

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🎀 Members 🎀

• nidt — Namespace Identifier Type. Which flavor of identifier are we in?? go check enum nvme_ns_id_desc_nidt for the menu of options, she has the full list 👑
• nidl — Namespace Identifier Length. This is how many bytes long struct nvme_id_ns.nid is. count 'em, don't guess 🧮
• rsvd — Reserved. literally just sitting there. do not perceive her. do not touch her. she's resting 🙈
• nid — Namespace Identifier. This holds a value that is globally unique and gets assigned to the namespace right when the namespace is created — like a name tag you get at birth but for storage 🍼✨ The length is defined in struct nvme_id_ns.nidl, so no, you don't get to decide it yourself, that's not your main character moment.

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🫶 bestie reminder: nidl tells you the length, and struct nvme_id_ns.nidl also tells you the length. yes they're coordinated. no that's not a typo. the struct is just thorough like that.

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and that's the whole page, no cap — we out here in the libnvme API Manual, that's the manual name, folder her in right up top like a lil sticker 🎀 this page is struct nvme_ns_id_desc's very own, versioned with libnvme(2), and it was dated July 2026 so she's fresh fr fr. mwah, bye 💖🦋⭐