libnvme(2)

✨ libnvme ✨ — the API Manual, bestie edition 💅

okay so we're deep in the libnvme(2) girlies today and the topic is struct nvmf_ext_die, aka the Extended Discovery Information Entry, aka the DIE. it's giving structure. it's giving bytes. it's giving "please don't touch the reserved fields." let's go 🫶

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🌸 NAME 🌸

struct nvmf_ext_die — Extended Discovery Information Entry (DIE) 💖

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✨ SYNOPSIS ✨

struct nvmf_ext_die {
    __u8 trtype;
    __u8 adrfam;
    __u8 subtype;
    __u8 treq;
    __le16 portid;
    __le16 cntlid;
    __le16 asqsz;
    __u8 rsvd10[22];
    char trsvcid[NVMF_TRSVCID_SIZE];
    __u8 resv64[192];
    char nqn[NVME_NQN_LENGTH];
    char traddr[NVMF_TRADDR_SIZE];
    union nvmf_tsas         tsas;
    __le32 tel;
    __le16 numexat;
    __u8 resv1030[2];
    struct nvmf_ext_attr    exat[];
};

no cap, that's the whole layout. read it top to bottom like a group chat, everything matters 😌

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🎀 Members 🎀

every single field, in order, no skipping, we do NOT skip bestie:

• trtype — Transport Type, and yes it's an enum nvmf_trtype ✨
• adrfam — Address Family, typed as enum nvmf_addr_family 🌈
• subtype — Subsystem Type, which is an enum nvme_subsys_type 👑
• treq — Transport Requirements, an enum nvmf_treq 💜
• portid — Port ID 🍓
• cntlid — Controller ID 💫
• asqsz — Admin Max SQ Size 🔥
• rsvd10 — Reserved. hands off, it's not yours 🙈
• trsvcid — Transport Service Identifier 🎀
• resv64 — Reserved. also not yours. respect the reserved. 💅
• nqn — NVM Qualified Name ⭐
• traddr — Transport Address 🦋
• tsas — Transport Specific Address Subtype, and it's a union nvmf_tsas 🧚
• tel — Total Entry Length 🌸
• numexat — Number of Extended Attributes 👑
• resv1030 — Reserved. third reserved field, third time asking, please leave it alone 😭
• exat — Extended Attributes 0, typed as struct nvmf_ext_attr, and yeah it's the flexible array member at the end, main character energy fr fr 🔥

bestie heads up: the fields marked Reserved are Reserved. that means you do not write to them. you do not read meaning out of them. you simply admire them from a respectful distance. periodt 💖

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that's the whole DIE, decoded and slayed. struct girlies stay winning 🌈

okay bye ily, this was struct nvmf_ext_die from the libnvme(2) API Manual, dated July 2026 — mwah, go format some discovery entries responsibly 💅✨🎀