NVME_NAMESPACE_ATTACH_CTRLS(2)

💖 nvme_namespace_attach_ctrls — libnvme API manual, bestie edition 💖

okay so welcome to the libnvme API manual ✨ today we're looking at nvme_namespace_attach_ctrls, and ngl this one is a whole vibe: it glues a namespace onto a controller (or a bunch of controllers, she's flexible like that 👑).

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🌸 NAME 🌸

nvme_namespace_attach_ctrls — attach namespace to controller(s) 💅

like. the name literally tells you. namespace. attach. controllers. periodt.

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✨ SYNOPSIS ✨

int nvme_namespace_attach_ctrls (int fd , __u32 nsid , __u16 num_ctrls ,
       __u16 *ctrlist );

look at her 🥹 four args, one int coming back at you. no cap.

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🎀 ARGUMENTS 🎀

• fd — the file descriptor of the nvme device. yes bestie, you gotta open the device first, this is your ✨entry pass✨ to the whole thing.
• nsid — namespace ID to attach. this is which namespace we're yassifying onto the controller(s).
• num_ctrls — number of controllers in ctrlist. so like, how many entries are you actually handing over. count them. fr fr.
• ctrlist — list of controller IDs to perform the attach action. this is the guest list 💌 and everybody on it is getting attached.

ngl the pointer life is real — ctrlist is a __u16 *, so you're passing an array, not one lonely little value 🫶

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🔥 RETURN 🔥

• if a response came back, you get the nvme command status</> — check enum nvme_status_field for the tea ☕
• otherwise? -1 with errno set 😭 the classic. she said "something went wrong" and made you go read errno yourself.

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🦋 SEE ALSO 🦋

hmm, this page doesn't list any SEE ALSO refs, so we're keeping it cozy and self-contained 💜 (no invented cross-references here, that's not the move)

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💀 reminder bestie: nvme_namespace_attach_ctrls takes an fd, an nsid, a num_ctrls, and a ctrlist — in that exact order. do not shuffle. the compiler will not be nice about it.

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and that's the page, babes 🌈 it's from the libnvme API manual and it's dated July 2026 — so yeah, she's fresh, she's current, she's iconic. go attach something 💖✨🎀🦋🌸