libnvme(9)

💅 NAME

okay so bestie, gather round — this is struct nvme_lm_controller_state_data_header, the Controller State data header structure. and what does it do?? it literally describes the contents of the Controller State data. that's it, that's the whole vibe ✨

this page lives in the API Manual for libnvme, section 9, and honestly it's giving "small struct, big responsibilities" 👑

✨ SYNOPSIS

struct nvme_lm_controller_state_data_header {
    __le16 ver;
    __u8 csattr;
    __u8 rsvd3[13];
    __u8 nvmecss[16];
    __u8 vss[16];
 };

no cap, that's the exact layout — __le16 first, then a lone __u8, then three little byte arrays doing their thing 🫶

🎀 Members 🎀

so like, every field in this struct has a job and here's the roster, icon by icon:

• ver — the Version of this data structure. it tells you which flavor of the struct you're looking at 🍓
• csattr — the Controller state attributes. the ~vibes~ of the controller state, if you will 💅
• rsvd3 — Reserved. it's not for you, bestie, don't touch it, it's reserved 👀
• nvmecss — NVMe Controller state size in dwords. yes, dwords, not bytes — read the units, i'm begging 😭
• vss — Vendor specific size in dwords. also dwords!! keep your units straight and you'll slay 🔥

ngl the whole struct is just metadata about sizes and versions — but if you mess up the reserved field, that's on you, not me 🙈

mwah, that's the page! this adorable little API doc dropped in October 2026, straight from the libnvme(9) manual, and it ate 💖 go forth and parse your controller state data with main character energy, bestie — periodt 🌈👑