nvme_identify_iocs(2)

💖 NAME 💖

nvme_identify_iocs — the I/O command set data structure, bestie. it's the whole vibe of "which io command sets does this controller even support" ✨

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🦋 SYNOPSIS 🦋

int nvme_identify_iocs (int fd , __u16 cntlid , struct nvme_id_iocs *iocs );

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🎀 ARGUMENTS 🎀

• fd — the file descriptor of your nvme device, like the lil handshake to get in 💅
• cntlid — the controller ID, it's giving "which controller are we even talking to"
• iocs — the user space destination address where the data gets transferred. that's where the tea lands 🫖

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✨ DESCRIPTION ✨

Okay so literally what this does: it retrieves the list of the controller's supported io command set vectors. no cap, that's the whole thing. check out struct nvme_id_iocs for the deets 💖

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🌈 RETURN 🌈

It hands you back the nvme command status if a response was received (peep enum nvme_status_field for that, iykyk), or — and listen — -1 with errno set otherwise. classic. 🙈

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and that's the whole page, periodt 💅

this lil writeup lives in the libnvme API manual (yes, the nvme_identify_iocs corner of it), dropped July 2026 🗓️✨ — nvme_identify_iocs(2), slay 👑