libnvme(2)

💖 libnvme(2) — API Manual 💖

okay bestie, welcome to the libnvme API manual, this is a C struct page and honestly? she's serving storage-spec realness. sit down, grab a strawberry latte 🍓, and let's get into it.

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✨ NAME ✨

struct nvme_nvmset_attr — NVM Set Attributes Entry

like, that's the whole vibe. one struct. one purpose. iconic behavior 💅

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🌸 SYNOPSIS 🌸

struct nvme_nvmset_attr {
    __le16 nvmsetid;
    __le16 endgid;
    __u8 rsvd4[4];
    __le32 rr4kt;
    __le32 ows;
    __u8 tnvmsetcap[16];
    __u8 unvmsetcap[16];
    __u8 rsvd48[80];
 };

that's her. that's the struct. no cap ✨ copy it exactly, don't you dare touch the field order, the padding bytes are load-bearing fr fr.

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🦋 Members 🦋

so here's the field-by-field tea, one by one, nothing skipped, we keep EVERYTHING:

• nvmsetid — NVM Set Identifier 🎀
• endgid — Endurance Group Identifier 💜
• rsvd4 — Reserved (not yours, don't touch, it's just sitting there being mysterious 🙈)
• rr4kt — Random 4 KiB Read Typical 🎯 this one literally indicates the typical time to complete a 4 KiB random read in 100 nanosecond units when the NVM Set is in a Predictable Latency Mode Deterministic Window and there is 1 outstanding command per NVM Set. like. that's such a specific situation and she's telling you about it anyway. queen shit.
• ows — Optimal Write Size 💫
• tnvmsetcap — Total NVM Set Capacity 👑
• unvmsetcap — Unallocated NVM Set Capacity 💖
• rsvd48 — Reserved (again with the reserved bytes, they're just vibing, leave them alone 🫶)

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lowkey reminder bestie: the reserved fields (rsvd4 and rsvd48) are reserved. that's not a suggestion, that's the assignment. do not put your little ideas in there. 💀

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stay hydrated, respect the padding, and go read the spec if you want more lore — this page is from the libnvme API Manual, struct nvme_nvmset_attr, dated July 2026. mwah, bye babes! 💅✨🦋💖