nvme_identify_ctrl_csi(2)

✨ nvme_identify_ctrl_csi ✨

okay bestie, so this one lives in the libnvme API manual, section 2 (nvme_identify_ctrl_csi(2)) — yes, the system call section, we're being ✨fancy✨ today.

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💖 NAME 💖

nvme_identify_ctrl_csi — it's giving I/O command set specific Identify Controller data 🌈

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🫶 SYNOPSIS 🫶

int nvme_identify_ctrl_csi (int fd , enum nvme_csi csi , void *data );

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🎀 ARGUMENTS 🎀

• fd — the file descriptor of the nvme device 🦋 like, your lil handle to the drive, no big deal
• csi — the Command Set Identifier 💅 this is the one that tells everyone which command set we're being specific about
• data — user space destination address to transfer the data 📦 the place in your program where the goods get dropped off

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🌸 DESCRIPTION 🌸

okay so check it — an I/O Command Set specific Identify Controller data structure gets returned to the host, for the controller that's processing the command. 🧚✨

and which specific Identify Controller data structure you're getting back? yeah, that's specified by csi. literally that's the whole vibe check. the csi you pass in decides which flavor shows up. 🔥

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⭐ RETURN ⭐

it gives you back the nvme command status if a response was received (peep enum nvme_status_field if you want the deets 👀), or -1 with errno set otherwise. so if it's mad at you, go read errno, she's telling you why 😭💀

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and that's the whole page, bestie, no cap 💜 this was libnvme API manual material, dated July 2026 — mwah, iconic, periodt. 🎀👑