nvme_get_host_telemetry(2)

💖 nvme_get_host_telemetry(2) 💖

okay so bestie, welcome to the libnvme API manual ✨ we're talking about nvme_get_host_telemetry today and honestly? it's giving very demure, very mindful, very "i just want the host telemetry log" 🎀

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✨ NAME ✨

nvme_get_host_telemetry — get host telemetry log 🦋 like, it goes and fetches the telemetry log for you. that's the whole vibe. no cap.

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✨ SYNOPSIS ✨

int nvme_get_host_telemetry (int fd , struct nvme_telemetry_log **log ,
enum nvme_telemetry_da da , size_t *size );

periodt. that's the whole signature, look at her 👑

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✨ ARGUMENTS ✨

• fd — the file descriptor of the nvme device. you know, the little number that's your backstage pass to the drive 🎟️
• log — on success, this gets set to the value of the allocated and retrieved log. so like, if everything slays, your pointer here is gonna be holding the goods 💅
• da — the log page data area. valid values live in enum nvme_telemetry_da — don't freestyle this one, use the enum bestie 🙈
• size — a pointer to the telemetry log size, so it can be returned to you. she's an out-param, she's doing the most, respect her 🌸

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✨ DESCRIPTION ✨

so here's the math and yes we're doing math in a manpage, stay with me 🧮✨ the total size allocated can be calculated as:

(nvme_telemetry_log da size + 1) * NVME_LOG_TELEM_BLOCK_SIZE

that's it, that's the formula. the da size plus one, times NVME_LOG_TELEM_BLOCK_SIZE. iconic behavior tbh 🔥

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✨ RETURN ✨

you're gonna get back the nvme command status if a response was received — peep enum nvme_status_field for the deets 👀 — or -1 with errno set otherwise. so if you see that -1, check your errno, she's trying to tell you something 😭

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tiny reminder bestie: errno does NOT set itself for fun. if you got -1, go read it. iykyk 💜

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and that's the whole page, we ate and left no crumbs 🍓 the source is libnvme API manual, dated July 2026, and this was nvme_get_host_telemetry section 2 — mwah, take care of your nvme devices and your pointers, ily 🫶💖✨