libnvme(2)

💖 libnvme (2) 💖

okay bestie, welcome to the API Manual — yes, that libnvme, the one you've been lowkey putting off reading. sit down, grab a strawberry, we're learning about one (1) struct and we're gonna slay it 🍓✨

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🌸 NAME 🌸

struct nvme_registered_ctrl_ext — Registered Controller Extended Data Structure

it's giving "reservation bookkeeping but make it extended" 💅 no cap.

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✨ SYNOPSIS ✨

struct nvme_registered_ctrl_ext {
    __le16 cntlid;
    __u8 rcsts;
    __u8 rsvd3[5];
    __le64 rkey;
    __u8 hostid[16];
    __u8 rsvd32[32];
 };

look at her. iconic. every field exactly as the spec intended, nothing invented, nothing dropped 😌

heads up bestie: those __le16 / __le64 types are little-endian, and the rsvd3 / rsvd32 arrays are reserved — do not go writing your own lore into them, bestie, they are not yours 🫶

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🎀 Members 🎀

okay so, field-by-field, the way that each one has a job and each one is doing it:

• cntlid — Controller ID. that's the controller's identifier, fr fr 🪪
• rcsts — Reservation Status. the vibe check on the reservation state ✨
• rsvd3 — Reserved. just filler, hands off 🙈
• rkey — Reservation Key. the key, the moment, the whole point 🔑🔥
• hostid — Host Identifier. says which host it is 👑
• rsvd32 — Reserved. more filler, still not yours, still hands off 💀

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and that's the whole page, my love — six members, zero drama, main character energy only 🌈💜

sign-off time: this lil gem is dated July 2026, it's the struct nvme_registered_ctrl_ext entry, and it lives in the libnvme(2) manual. go forth and query responsibly 🦋💖