nvme_set_features_host_id(2)

✨ nvme_set_features_host_id(2) ✨

okay bestie, welcome to the libnvme API manual 💖 this one is nvme_set_features_host_id(2) and it's literally the glow-up your NVMe device's identity needed. sit down, sip your matcha, we're doing this.

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🎀 NAME 🎀

nvme_set_features_host_id — Set enable extended host identifiers feature

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💅 SYNOPSIS 💅

int nvme_set_features_host_id (int fd , bool exhid , bool save , __u8
*hostid );

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🌸 ARGUMENTS 🌸

• fd — File descriptor of nvme device. this is your golden ticket, your all-access pass, the lil number that says "yes this drive, her, the one right there" 👑
• exhid — Enable Extended Host Identifier. flip this and you're asking for the extended version of the host identifier, no cap.
• save — Save value across power states. set it and the setting sticks around even after the device goes night-night 😴, instead of forgetting everything the moment the lights go out.
• hostid — Host ID to set. it's a __u8 *, so it's the actual host ID value you're handing over. this is the main character of the whole call fr fr 💫

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🫶 RETURN 🫶

you get back the nvme command status if a response was received (peep enum nvme_status_field for what those statuses actually mean), or -1 with errno set otherwise. so basically: status code = the device talked back, -1 = something went sideways and errno is holding the receipts.

ngl, if you see -1, go check errno before you spiral. it's giving "read the error, babe" 💀

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okay that's the whole page, no filler, no fluff, we ate and left no crumbs 🍓

this was brought to you by July 2026 and the libnvme API manual — mwah, love u, go set some host IDs 💜✨🧚