libnvme(2)

💖 NAME 💖

struct nvme_resv_status — the Reservation Status Data Structure, bestie. It's literally the glow-up receipt for who's got a reservation held on your namespace ✨

So this is a page from the libnvme API manual — yes, the libnvme(2) girlies 🎀 — and we're doing a deep dive on one struct, so grab your strawberry drink 🍓 and let's go.

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✨ SYNOPSIS ✨

struct nvme_resv_status {
    __le32 gen;
    __u8 rtype;
    __u8 regctl[2];
    __u8 rsvd7[2];
    __u8 ptpls;
    __u8 rsvd10[14];
    union {
      struct {
        __u8 rsvd24[40];
        struct nvme_registered_ctrl_ext regctl_eds[0];
      };
      struct nvme_registered_ctrl regctl_ds[0];
    };
 };

No cap, that union is doing main character energy 🫶

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🌸 Members 🌸

Okay so here's the full member-by-member vibe check, and I'm listing every single one because we don't skip, periodt 💅

• gen — the Generation. It's giving "which version of the reservation sitch are we on" 🔥
• rtype — the Reservation Type. This is the what kind of reservation tea ☕
• regctl — Number of Registered Controllers. Like, how many controllers are on the guest list 👑
• rsvd7 — Reserved. Not for us, babe — hands off 🙈
• ptpls — Persist Through Power Loss State. Does the reservation survive the lights going out? This field knows 💀✨
• rsvd10 — Reserved. Another little reserved moment, leave it alone 🎀
• {unnamed_union} — anonymous. Yes bestie, it's literally an unnamed union, she has no name and she doesn't need one 🦋
• {unnamed_struct} — anonymous. Same energy, an unnamed struct, iconic and mysterious ✨
• rsvd24 — Reserved. Twenty-four reserved bytes of pure silence, respect them 🌈
• regctl_eds — Registered Controller Extended Data Structure. The extended, highkey extra version of the registered controller info 💜
• regctl_ds — Registered Controller Data Structure. The regular, lowkey version of the registered controller info 💖

Heads up: both regctl_eds and regctl_ds are declared with [0] and they live in the same anonymous union, so it's one or the other — you don't get both at once, iykyk 😭

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and that's the whole struct, bestie, you ate that 🧚⭐

This page was brought to you by the libnvme(2) API manual, all about struct nvme_resv_status, dated July 2026 — mwah, slay, go read more manpages 💖