nvme_mi_adm...ify_cns_nsid(2)

💖 nvme_mi_admin_identify_cns_nsid — bestie edition 💖

okay so this one lives in the libnvme API manual, and she's a little function with a big name. like, the name alone is giving ✨main character✨. but don't let the length scare you, she's actually so chill once you know what she wants 🫶

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✨ NAME ✨

nvme_mi_admin_identify_cns_nsid — Perform an Admin identify command using specific CNS/NSID parameters.

that's it. that's the vibe. she asks the controller "hey who are you actually" and she's very specific about which part of "you" she means 💅

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🌸 SYNOPSIS 🌸

int nvme_mi_admin_identify_cns_nsid (nvme_mi_ctrl_t ctrl , enum
nvme_identify_cns cns , __u32 nsid , void *data );

four things. that's the whole girl. let's go through them one by one, no skips 🎀

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🦋 ARGUMENTS 🦋

• ctrl — the Controller to process the identify command. this is the lil guy you're asking the question to, bestie. hand her the controller 🫶
• cns — the Controller or Namespace Structure, specifying the identified object. i.e. what are we identifying, queen? a controller? a namespace? the structure tells us which 😌
• nsid — namespace ID. the specific namespace you're pointing at 👑
• data — buffer for identify data response. this is where the answer lands. bring your own empty bucket 🍓

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💅 DESCRIPTION 💅

So. You want to Perform an Identify command — and you do it using the CNS specifier cns, and the namespace ID nsid if the CNS type requires it. not every CNS needs an nsid, so don't stress if sometimes it's just vibing there unused 😭

She Stores the identify data in data, and data is expected to be a buffer of NVME_IDENTIFY_DATA_SIZE bytes. mark that. NVME_IDENTIFY_DATA_SIZE. bytes. do not rock up with a tiny buffer, that's not the move 🙈

⚠️ and she Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE. so like. half a response? not accepted. it's giving all-or-nothing, periodt 💀

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⭐ RETURN ⭐

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

so either you got a response and you vibe with the nvme command status, or you got -1 and you go check errno like a detective 🔍

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💖 reminder bestie: enum nvme_status_field is right there if you need to decode what the status is saying. iykyk ✨

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and that's the whole page, no cap 🌈

this was the libnvme API manual, entry nvme_mi_adm...ify_cns_nsid(2), and she's dated July 2026 if you ever need to cite her in a group chat 🎀 mwah, go identify something, you absolute icon 👑💜