libnvme(2)

💖 libnvme(2) 💖

okay bestie, welcome to the libnvme manual, page 2 ✨ this is the API manual and today's main character is an enum. yes, an enum. she's long, she's iconic, she has 28 values, and we're gonna go through every single one of them together because we don't skip. periodt. 🎀

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🌸 NAME 🌸

enum nvme_identify_cns — Identify - CNS Values 💅

(CNS = Controller Namespace? bestie no. it's the Identify command's "what do you want me to identify" selector. anyway, keep reading, the constants explain themselves.)

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✨ SYNOPSIS ✨

enum nvme_identify_cns {
    NVME_IDENTIFY_CNS_NS ,
    NVME_IDENTIFY_CNS_CTRL ,
    NVME_IDENTIFY_CNS_NS_ACTIVE_LIST ,
    NVME_IDENTIFY_CNS_NS_DESC_LIST ,
    NVME_IDENTIFY_CNS_NVMSET_LIST ,
    NVME_IDENTIFY_CNS_CSI_NS ,
    NVME_IDENTIFY_CNS_CSI_CTRL ,
    NVME_IDENTIFY_CNS_CSI_NS_ACTIVE_LIST ,
    NVME_IDENTIFY_CNS_CSI_INDEPENDENT_ID_NS ,
    NVME_IDENTIFY_CNS_NS_USER_DATA_FORMAT ,
    NVME_IDENTIFY_CNS_CSI_NS_USER_DATA_FORMAT ,
    NVME_IDENTIFY_CNS_ALLOCATED_NS_LIST ,
    NVME_IDENTIFY_CNS_ALLOCATED_NS ,
    NVME_IDENTIFY_CNS_NS_CTRL_LIST ,
    NVME_IDENTIFY_CNS_CTRL_LIST ,
    NVME_IDENTIFY_CNS_PRIMARY_CTRL_CAP ,
    NVME_IDENTIFY_CNS_SECONDARY_CTRL_LIST ,
    NVME_IDENTIFY_CNS_NS_GRANULARITY ,
    NVME_IDENTIFY_CNS_UUID_LIST ,
    NVME_IDENTIFY_CNS_DOMAIN_LIST ,
    NVME_IDENTIFY_CNS_ENDURANCE_GROUP_ID ,
    NVME_IDENTIFY_CNS_CSI_ALLOCATED_NS_LIST ,
    NVME_IDENTIFY_CNS_CSI_ID_NS_DATA_STRUCTURE ,
    NVME_IDENTIFY_CNS_COMMAND_SET_STRUCTURE ,
    NVME_IDENTIFY_CNS_UNDERLYING_NS_LIST ,
    NVME_IDENTIFY_CNS_PORTS_LIST ,
    NVME_IDENTIFY_CNS_IOCS_IND_ID_ALLOC_NS ,
    NVME_IDENTIFY_CNS_SUPPORTED_CTRL_STATE_FORMATS

};

like. look at her. 28 entries, all just vibing in an enum with nothing assigned, which is so real of her. 🦋

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👑 Constants 👑

every single value, in the exact order she was born, no gatekeeping 🔥

🌈 the namespace & controller classics

• NVME_IDENTIFY_CNS_NS — Identify Namespace data structure 🫶
• NVME_IDENTIFY_CNS_CTRL — Identify Controller data structure 🫶
• NVME_IDENTIFY_CNS_NS_ACTIVE_LIST — Active Namespace ID list ✨
• NVME_IDENTIFY_CNS_NS_DESC_LIST — Namespace Identification Descriptor list 📝
• NVME_IDENTIFY_CNS_NVMSET_LIST — NVM Set List 📋

🧚 the I/O Command Set girlies

• NVME_IDENTIFY_CNS_CSI_NS — I/O Command Set specific Identify Namespace data structure 💜
• NVME_IDENTIFY_CNS_CSI_CTRL — I/O Command Set specific Identify Controller data structure 💜
• NVME_IDENTIFY_CNS_CSI_NS_ACTIVE_LIST — Active Namespace ID list associated with the specified I/O Command Set 🌸
• NVME_IDENTIFY_CNS_CSI_INDEPENDENT_ID_NS — I/O Command Set Independent Identify 🌟

🎀 user data format era

• NVME_IDENTIFY_CNS_NS_USER_DATA_FORMAT — Namespace user data format 💅
• NVME_IDENTIFY_CNS_CSI_NS_USER_DATA_FORMAT — I/O Command Set specific user data format Namespace data structure 💅

🍓 allocated namespace lore

• NVME_IDENTIFY_CNS_ALLOCATED_NS_LIST — Allocated Namespace ID list 📃
• NVME_IDENTIFY_CNS_ALLOCATED_NS — Identify Namespace data structure for the specified allocated NSID 🔍

🫶 controller lists (yes plural, plural slays)

• NVME_IDENTIFY_CNS_NS_CTRL_LIST — Controller List of controllers attached to the specified NSID 🔗
• NVME_IDENTIFY_CNS_CTRL_LIST — Controller List of controllers that exist in the NVM subsystem 🌐
• NVME_IDENTIFY_CNS_PRIMARY_CTRL_CAP — Primary Controller Capabilities data structure for the specified primary controller 👑
• NVME_IDENTIFY_CNS_SECONDARY_CTRL_LIST — Secondary Controller list of controllers associated with the primary controller processing the command 🪩

✨ the lists, the lore, the range

• NVME_IDENTIFY_CNS_NS_GRANULARITY — A Namespace Granularity List 📐
• NVME_IDENTIFY_CNS_UUID_LIST — A UUID List 🆔
• NVME_IDENTIFY_CNS_DOMAIN_LIST — Domain List 🗺️
• NVME_IDENTIFY_CNS_ENDURANCE_GROUP_ID — Endurance Group List 💪

💀 I/O Command Set specific (again, but allocated this time)

• NVME_IDENTIFY_CNS_CSI_ALLOCATED_NS_LIST — I/O Command Set specific Allocated Namespace ID list 🗂️
• NVME_IDENTIFY_CNS_CSI_ID_NS_DATA_STRUCTURE — I/O Command Set specific ID Namespace Data Structure for Allocated Namespace ID 🧬

🔥 the deep lore section, lowkey the best part

• NVME_IDENTIFY_CNS_COMMAND_SET_STRUCTURE — I/O Command Set data structure 🏗️
• NVME_IDENTIFY_CNS_UNDERLYING_NS_LIST — Get Underlying Namespace List 🕵️
• NVME_IDENTIFY_CNS_PORTS_LIST — Get Ports List 🚪
• NVME_IDENTIFY_CNS_IOCS_IND_ID_ALLOC_NS — I/O Command Set Independent Identify Namespace data structure for the specified allocated NSID 🎯
• NVME_IDENTIFY_CNS_SUPPORTED_CTRL_STATE_FORMATS — Supported Controller State Formats identifying the supported NVMe Controller State data structures 🧠

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no cap, that's genuinely the whole page. 28 constants, every one of them listed, nothing skipped, we ate and left no crumbs 🍽️💅

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kisses bestie, this was enum nvme_identify_cns in the libnvme(2) manual, dated July 2026, and that's the vibe check passed 💖✨🦋🌸🎀