libnvme_mi_..._data_subsys(9)

📦 version 3.2, in arch rolling

💅 libnvme_mi_mi_read_mi_data_subsys (9) — from the libnvme API manual, bestie 🎀

okay so picture this: you're deep in the MI layer, right, and you just need the tea on a subsystem. that's literally this function. it's giving "let me pull up the receipts" energy and honestly? iconic. ✨

🌸 NAME 🌸

libnvme_mi_mi_read_mi_data_subsys — performs a Read MI Data Structure command and pulls the subsystem data for you. no cap, that's the whole job. 🫶

✨ SYNOPSIS ✨

int libnvme_mi_mi_read_mi_data_subsys (struct libnvme_mi_ep *ep , struct
nvme_mi_read_nvm_ss_info *s );

like yes she's a two-liner in the synopsis, she contains multitudes 💜

🦋 ARGUMENTS 🦋

  • ep — the endpoint for MI communication. this is your whole connection to the MI world, your main character 🔥
  • s — the subsystem information you want to populate. you hand her the struct, she fills her in. that's the deal 💅

🎀 DESCRIPTION 🎀

So what does she actually do? She retrieves the Subsystem information — and before you ask, that means:

  • the number of external ports 🌈
  • the NVMe version information ⭐

and if you wanna see exactly what shape that info takes, go look at struct nvme_mi_read_nvm_ss_info. she's the blueprint, the moment, the whole vibe check. 👑

💀 RETURN 💀

Here's the part where you gotta pay attention, bestie:

  • if a response came back, you get the nvme command status (peep enum nvme_status_field for the full menu of possibilities 👀)
  • otherwise you get a negative error code. not a vibe, but at least it's honest 😭
fr fr check that return value. a negative number is not a status field, it's a whole different beast, and mixing them up is a lowkey tragic mistake 🙈

and that's the page!! libnvme API manual, October 2026 — mwah, go read your subsystem data, you absolute legend 🧚‍♀️🍓💖

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