nvme_nvm_identify_ctrl(2)

✨ nvme_nvm_identify_ctrl ✨

okay so bestie, welcome to libnvme API manual, section 2 — this is the one and only nvme_nvm_identify_ctrl, and she's literally here to hand you the controller's whole identity card. no cap. 🎀

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🌸 NAME 🌸

nvme_nvm_identify_ctrl — identify controller data 💅

like… that's her whole job. getting the identify controller data. iconic behaviour fr fr.

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🦋 SYNOPSIS 🦋

int nvme_nvm_identify_ctrl (int fd , struct nvme_id_ctrl_nvm *id );

yes that's the entire signature, exactly like that, don't @ me about the spacing, it's the original and we respect her 😌

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🎀 ARGUMENTS 🎀

• fd — the file descriptor of the nvme device. your lil all-access pass to the drive, basically. 🔑
• id — user space destination address where the data gets transferred to. it's the lil bucket you're holding out so the kernel can drop the goods in. 🍓

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💖 DESCRIPTION 💖

so what does she actually do? she returns an identify controller data structure to the host of processing controller. that's the tea. the data structure comes back to you, the host, from the processing controller — and then you get to read it and feel like the main character. 👑

the way that this is genuinely just "give me the controller's info" but phrased in manpage-speak… lowkey poetry honestly. ✨

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⭐ RETURN ⭐

here's the vibe check on what you get back:

• the nvme command status, if a response was received — peep enum nvme_status_field for the full rundown of what those statuses mean. 🔥
• -1 with errno set, otherwise. yes, that's the it went sideways path. errno will be holding the receipts so you know what happened. 💀

heads up bestie: don't just check for -1 and call it a day — a real response can still carry a non-success nvme command status, and if you ignore that you're gonna have a bad time. read the enum. iykyk. 🫶

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and that's the whole page, periodt. 💜

this lil slice of documentation is from the libnvme API manual, version-dated July 2026, and yeah — nvme_nvm_identify_ctrl in section 2. go forth and identify some controllers, bestie. slay. 🌈🦋💅