STRUCT ND_NAMESPACE_IO(9)

💅 struct nd_namespace_io(9) 💅

okay bestie, welcome to the Kernel API Manual 🎀 — this is the page for struct nd_namespace_io, which is, like, the device representation of a persistent memory range. iconic behavior honestly ✨

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🌸 NAME 🌸

struct nd_namespace_io — device representation of a persistent memory range. that's the whole vibe. 💖

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✨ SYNOPSIS ✨

lowkey the main character itself:

struct nd_namespace_io {
    struct nd_namespace_common common;
    struct resource res;
    resource_size_t size;
    void *addr;
    struct badblocks bb;
 };

like?? the way that struct just sits there being all structured. obsessed. 🫶

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🦋 MEMBERS 🦋

okay so let's do a vibe check on every single field, no skipping, we're not doing that 🙈

• common — the namespace device core infrastructure, created by the nd region driver. it's giving foundation. it's giving "the nd region driver made this." 👑
• res — a struct resource conversion of a NFIT SPA table. yes that's the whole description, don't look at me, it's literally converting a NFIT SPA table into a struct resource 💅
• size — cached resource_size(res) so we can do fast path size checks. it's literally the size, pre-computed, because nobody has time to recalculate. speed. slay. ⚡
• addr — the virtual address you use to access the namespace range. that's your door in, bestie 🚪✨
• bb — badblocks list for the namespace range. everyone's got a badblocks list, it's fine, we don't judge 🫶

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🌈 SEE ALSO 🌈

go read these next, i'm serious, they're the friend group:

• Kernel file ./include/linux/nd.h 📁
• struct nvdimm_pmu(9)
• struct nd_namespace_common(9)
• struct nd_namespace_pmem(9)
• nvdimm_read_bytes(9)
• nvdimm_write_bytes(9)

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ngl the whole point of this page is so you don't have to guess what each field means. highkey read it before you touch persistent memory, fr fr. 😭💀

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alright that's the whole page babes 💜 — this one came from ./include/linux and it's stamped October 2026, on the page struct nd_namespace_io(9). mwah, go forth and namespace responsibly 💅🎀