libnvme(9)

✨ libnvme(9) — API Manual ✨

okay bestie, so this is a page out of the libnvme API manual (that's section 9, the kernel/API girlies know 💅), and today's main character is a struct that's honestly kind of a baddie: struct nvme_copy_range_f3, aka the Copy - Source Range Entries Descriptor Format 3h. yes that's a whole mouthful, we love a long title 🎀

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🌸 NAME 🌸

struct nvme_copy_range_f3 — Copy - Source Range Entries Descriptor Format 3h

like, it's a copy range entry descriptor, the format 3h one specifically, no cap 💖

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✨ SYNOPSIS ✨

struct nvme_copy_range_f3 {
    __le32 snsid;
    __u8 rsvd4[4];
    __le64 slba;
    __le16 nlb;
    __u8 cetype;
    __u8 rsvd19;
    __le16 cev;
    __le16 sopt;
    __u8 rsvd24[2];
    __u8 elbt[10];
    __le16 elbat;
    __le16 elbatm;
 };

look at her. iconic struct layout, honestly 🫶

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🦋 Members 🦋

so here's the full roster, every single field, we're not skipping a one of them:

• snsid — Source Namespace Identifier 💫 like, which namespace are we copying from, ykwim
• rsvd4 — Reserved 🔒 (it's reserved, bestie, hands off)
• slba — Starting LBA, the starting logical block address, the ~beginning~ if you will 📍
• nlb — Number of Logical Blocks 🔢
• cetype — Bits 3-0: Command Extension Type 🧩 only bits 3-0, mind you
• rsvd19 — Reserved 🔒
• cev — Command Extension Value 💠
• sopt — Source Options ⚙️
• rsvd24 — Reserved 🔒 (yes, another one, they really said save some room)
• elbt — Expected Initial Logical Block Reference Tag / Expected Logical Block Storage Tag 🏷️ (it's giving two-jobs energy, and honestly? she's serving both)
• elbat — Expected Logical Block Application Tag 📎
• elbatm — Expected Logical Block Application Tag Mask 🎭

ngl the reserved fields are giving "saving seats for friends who never show up" 😭 but that's the struct, we respect her 🙈

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🌈 a lil sign-off 🌈

this page was living in the libnvme(9) manual, dated October 2026, and it's literally all about struct nvme_copy_range_f3. periodt, that's the whole vibe, go copy some ranges responsibly bestie 💜✨