libnvme(9)

💖 libnvme(9) — API Manual 💖

okay bestie, so this is a page out of the libnvme API Manual (section 9, so it's kernel/API-adjacent, iykyk) and it's literally just one struct. but not me being obsessed with a log structure — it's giving "small but mighty" and honestly? slay. 🦋

✨ NAME ✨

struct nvme_ana_log — the Asymmetric Namespace Access Log, no cap. that's it, that's the whole name. 🎀

🌸 SYNOPSIS 🌸

here's the glow-up layout, copy it exactly bestie, character for character:

struct nvme_ana_log {
    __le64 chgcnt;
    __le16 ngrps;
    __u8 rsvd10[6];
    struct nvme_ana_group_desc descs[];
 };

the way this struct is just four fields living their best life... main character energy fr fr. 💅

👑 MEMBERS 👑

• chgcnt — the Change Count. it's a __le64, so yes honey, little-endian, respect the byte order. it counts changes. that's the vibe. 🔥
• ngrps — the Number of ANA Group Descriptors. a __le16. literally telling you how many descriptors are about to show up in descs. 🌈
• rsvd10 — Reserved. __u8 rsvd10[6], six whole bytes of "don't touch, not for you". it's giving VIP velvet rope. 💀
• descs — the ANA Group Descriptor. it's struct nvme_ana_group_desc descs[], a flexible array member, so the descriptors are just... chillin' at the end. iconic. ⭐

ngl bestie, rsvd10 is reserved — do not go poking at it like it's free real estate. it is not. 🙈

aaaand that's the whole page, short and sweet like a text you send at 2am. 🧚 the libnvme crew put this out under the API Manual umbrella and the page is stamped October 2026 with struct nvme_ana_log right there in the footer — so like, cite it correctly when you're being a scholar, mwah 💜🫶🍓