libnvme(9)

💖 NAME 💖

okay so bestie, gather round, because we're talking about struct nvme_lockdown_args — that's the arguments bundle for the NVME Lockdown command. it's giving "here's everything you need to hand over so the kernel knows what you want locked down" ✨

this whole page lives in the libnvme API manual, section 9. iykyk 🎀

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🦋 SYNOPSIS 🦋

struct nvme_lockdown_args {
    __u32 *result;
    int args_size;
    int fd;
    __u32 timeout;
    __u8 scp;
    __u8 prhbt;
    __u8 ifc;
    __u8 ofi;
    __u8 uuidx;
 };

like, that's the whole vibe right there. nine little fields, one big lockdown 💅

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🌸 Members 🌸

okay so let's meet the cast, one by one, no skips, no skimming, we're doing all of them 🫶

• result — this is a __u32 *, a pointer, and it's where the command completion result from CQE dword0 lands. so when it's done, the answer shows up here. iconic. ⭐
• args_size — an int that holds the size of struct nvme_lockdown_args. it's literally just telling everyone how big this struct is. self-aware king. 👑
• fd — the file descriptor of the nvme device. that's your connection to the actual hardware, bestie. 🍓
• timeout — timeout in ms, and lowkey important: 0 for default timeout. so if you don't care, just throw a zero in there and let the default do its thing. ✨
• scp — a __u8 holding the scope of the command. 🌈
• prhbt — a __u8 that says whether to prohibit or allow the command opcode or Set Features command. yes it really is spelled that way, no vowel crimes were committed by me personally. 😭
• ifc — a __u8 for the affected interface. 🧚
• ofi — a __u8 for the Opcode or Feature Identifier. that's what ofi stands for, mystery solved, you're welcome. 💜
• uuidx — a __u8 for the UUID Index, but only if the controller supports this id selection method. conditional queen. if it doesn't support it, that's just not the vibe. 🦋

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quick vibe check: every one of those fields is exactly what the original says, no extras, no guessing. i'm not out here inventing behaviour, i'm just hyping up the facts. 💖

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and that's the whole page!! this was pulled from the libnvme API manual, section 9, and the page is dated August 2026, filed under struct nvme_lockdown_args. slay, go forth, and lock things down responsibly. periodt. 💅✨🎀