libnvme(2)

💖 libnvme(2) — API Manual 🎀

okay bestie, come sit with me because we're doing the libnvme manual, section 2 — that's the API Manual, the devs-only zone, and today's main character is one very specific lil struct. no cap, it's giving "I hold the receipts on your controller resets" energy. let's go 🦋

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✨ NAME ✨

struct nvme_power_on_reset_info_list — literally the Controller Reset Information struct. that's it, that's the whole job. she tracks what went down when your controller powered on / reset. 💅

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🌸 SYNOPSIS 🌸

struct nvme_power_on_reset_info_list {
    __le16 cid;
    __u8 fw_act;
    __u8 op_in_prog;
    __u8 rsvd4[12];
    __le32 ctrl_power_cycle;
    __le64 power_on_ml_seconds;
    __le64 ctrl_time_stamp;
 };

copy that verbatim, don't you dare "clean it up" bestie, every underscore and every __le prefix is load-bearing 💀

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👑 Members 👑

• cid — the Controller ID. which controller are we even talking about, bestie? this is how you find out. 🫶
• fw_act — Firmware Activation. the firmware activation situation. real "did the glow-up actually install" energy ✨
• op_in_prog — Operation in Progress. something's still mid-process, she's not done yet, do not interrupt 🙈
• rsvd4 — Reserved. it's reserved, so hands off, that's not your lane, we don't touch it periodt 💅
• ctrl_power_cycle — Controller Power Cycle. the power cycle count for the controller, she's keeping track 🔥
• power_on_ml_seconds — Power on milliseconds. power-on time, measured in milliseconds — yes, milli, tiny little units, we love precision 🎀
• ctrl_time_stamp — Controller Timestamp. the controller's timestamp, so you know exactly when this whole vibe happened ⭐

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lowkey important: these fields are laid out exactly as written in the synopsis, with their exact types — __le16, __u8, __u8, __u8[12], __le32, __le64, __le64 — in that order. the byte-for-byte layout is the whole point, so no remixing. 🧚

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and that's the whole page, bestie, you ate it 💖 this struct came straight out of libnvme (the one and only), stamped July 2026, and it's all about that struct nvme_power_on_reset_info_list. mwah, go forth and read your reset info 🌈💜