nvme_get_features_rrl(2)

✨ nvme_get_features_rrl ✨

okay bestie, so we're in the libnvme API manual and this lil function is called nvme_get_features_rrl — that's section 2 of the manual, iykyk — and it's literally just here to get the read recovery level feature 💖 like that's its whole thing, that's its moment, that's the assignment.

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🎀 SYNOPSIS 🎀

int nvme_get_features_rrl (int fd , enum nvme_get_features_sel sel ,
       __u32 *result );

not me presenting the signature exactly as written because we do not freestyle around here 💅

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🌸 ARGUMENTS 🌸

• fd — the file descriptor of your nvme device 🦋 like the actual handle to the thing you're talking to, no fd no vibes.
• sel — which type of attribute you want back, bestie. go look at enum nvme_get_features_sel for your options, it's right there waiting for you 💜
• result — this is where the answer lands: it's the command completion result from CQE dword0 ✨ very specific, very demure, very dword0.

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💫 RETURN 💫

so here's the tea: you get the nvme command status if a response was received — check enum nvme_status_field for what those statuses mean, bestie 😭 — or you get -1 with errno set if it went any other way. that's it. that's the whole deal. no cap.

🫶 reminder that -1 + errno is the "something else happened" route, not a status value. don't mix them up, queen.

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and that's the page!! no crumbs left, every single detail accounted for, we ate 🔥👑

sign-off time 🎀 this iconic lil page lives in the libnvme API manual, dated July 2026, and it signs itself off as nvme_get_features_rrl(2) — same name, same section, same legend. periodt. 💅✨