STRUCT NVDIMM_CXL_LABEL(9)

💅 NAME 💅

struct nvdimm_cxl_label — bestie, this is literally the CXL 2.0 Table 212 struct, no cap 👑

✨ SYNOPSIS ✨

Okay so here's the whole thing, copied exactly, do not touch:

struct nvdimm_cxl_label {
    u8 type[NSLABEL_UUID_LEN];
    u8 uuid[NSLABEL_UUID_LEN];
    u8 name[NSLABEL_NAME_LEN];
    __le32 flags;
    __le16 nrange;
    __le16 position;
    __le64 dpa;
    __le64 rawsize;
    __le32 slot;
    __le32 align;
    u8 region_uuid[16];
    u8 abstraction_uuid[16];
    __le16 lbasize;
    u8 reserved[0x56];
    __le64 checksum;
 };

Like, that's the whole vibe right there 🫶

🎀 Members 🎀

Every single field, bestie, we are not skipping a one:

• type — the uuid that IDs this label format, aka the namespace. It's giving "who dis" energy 🪪
• uuid — the uuid for the namespace that this label is out here describing 💖
• name — the friendly name for the namespace, cute and lowercase-friendly 🎀
• flags — NSLABEL_FLAG_UPDATING is the moment. Every other flag? Reserved. Not invited to the party 🙅‍♀️
• nrange — discontiguous namespace support, yes it's a whole thing ✨
• position — where this label sits in the set. Main character placement fr fr 📍
• dpa — start address in device-local capacity for this label, lowkey important 💾
• rawsize — the size of this label's contribution to the namespace. It's giving "my share" 🍓
• slot — slot id of this label in the label area. iykyk 🗂️
• align — alignment in SZ_256M blocks. Yeah, blocks. Periodt 📐
• region_uuid — the host interleave set identifier, iconic 🔥
• abstraction_uuid — the personality driver for this namespace. It has ~range~ personality 💅
• lbasize — address geometry for disk-like personalities, geometry queen 👑
• reserved — reserved. Nothing to see here, move along 🙈
• checksum — the fletcher64 sum of this label. It's the vibe check at the end 🌈

Not me saying "reserved" twice like it's a personality trait 😭 but yeah, reserved is just reserved, bestie, that's the whole lore.

🌈 SEE ALSO 🌈

Go read these next, bestie, they're all in the kernel file ./drivers/nvdimm/label.h:

• struct nd_namespace_index(9)
• struct cxl_region_label(9)
• struct nvdimm_efi_label(9)
• struct nd_label_id(9)

And that's the whole page, mwah 💋 — brought to you by ./drivers/nvdimm, dated October 2026, slay ✨🦋