NVME_MI_MI_READ_MI_DATA_CTRL(2)

💖 nvme_mi_mi_read_mi_data_ctrl — bestie edition 💖

okay so this is a page from the libnvme API manual, section 2, and yes we are about to learn it together because you deserve to know your NVMe Management Interface lore. no cap. 🦋

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✨ NAME ✨

nvme_mi_mi_read_mi_data_ctrl — run a Read MI Data Structure command and pull back the controller's info. it's giving "tell me everything about this controller, respectfully" 💅

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✨ SYNOPSIS ✨

int nvme_mi_mi_read_mi_data_ctrl (nvme_mi_ep_t ep , __u16 ctrl_id ,
       struct nvme_mi_read_ctrl_info *ctrl );

like. that's the whole incantation. copy it exactly, do not freestyle the underscores bestie 😭

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✨ ARGUMENTS ✨

• ep — the endpoint you're talking MI over. your little phone line to the device 🫶
• ctrl_id — the ID of the controller you want to interrogate. which one? this one. 👑
• ctrl — the controller data that's gonna get populated. it's the empty cup and this function is the juice 🌸

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✨ DESCRIPTION ✨

It retrieves the Controller Information Data Structure for the attached controller with ID ctrlid. 🤩

See struct nvme_mi_read_ctrl_info. (that struct is the whole point of this, lowkey — go read it, iykyk)

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✨ RETURN ✨

Two possible vibes here:

• the nvme command status, if a response was actually received — check enum nvme_status_field for what that status is saying 👀
• or -1, with errno set, otherwise. and yeah, that's the "it went wrong" timeline. 💀

bestie. for real. always check the return value. the errno is not gonna check itself and it will not text you back.

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🌈 the cute sign-off 🌈

this lil slice of documentation comes to you from the libnvme API manual, and the footer date on it is July 2026. iconic of it. mwah. 🎀✨🦋💜