libnvme(9)

💅 libnvme(9) — API Manual, bestie edition

Okay so this is a page straight out of the libnvme API Manual, and we're talking about one specific little struct. Buckle up 🎀

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✨ NAME ✨

struct tcg_l0_cnl — the Configurable Namespace Locking feature, and its feature code is 0x0403 (iconic, honestly 👑)

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🌸 SYNOPSIS 🌸

Here's the whole vibe, verbatim, no cap:

struct tcg_l0_cnl {
    __u8 flags;
    __u8 rsvd1[3];
    __be32 max_key_count;
    __be32 unused_key_count;
    __be32 max_ranges_per_ns;
 };

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💖 Members 💖

• flags — the flags field, and like… go look at enum tcg_l0_cnl_flags for what's actually in there 🦋
• rsvd1 — reserved. Not for you. Hands off 🙈
• max_key_count — the maximum key count 🔥
• unused_key_count — the unused key count, literally right there in the name ✨
• max_ranges_per_ns — the maximum ranges per namespace 💅

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🧚 Description 🧚

This is from the TCG Storage Opal SSC Feature Set: Configurable Namespace Locking, section 4.2.1. That's the whole lore, bestie 📖

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ngl if you're poking at the reserved bytes, that's not the main character energy we're going for — leave rsvd1 alone 🫶

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that's the whole page, periodt 💜 — this little beauty landed in October 2026, it's struct tcg_l0_cnl content from libnvme(9), and yes she ate, no crumbs 🌈⭐🍓