STRUCT DMA_BUF_EXPORT_INFO(9)

💅 struct dma_buf_export_info(9) 💅

ok so bestie, this is the Kernel API Manual page for struct dma_buf_export_info — yes the whole page is literally about one struct, and honestly? she deserves it. 🎀

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✨ NAME ✨

struct dma_buf_export_info — the little info-holder that holds everything you need to export a dma_buf. it's giving "gift-wrapped buffer," iykyk 🎁

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🦋 SYNOPSIS 🦋

struct dma_buf_export_info {
    const char *exp_name;
    struct module *owner;
    const struct dma_buf_ops *ops;
    size_t size;
    int flags;
    struct dma_resv *resv;
    void *priv;
 };

like, that's the whole glow-up. seven fields. each one pulling its weight. 💜

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🌸 Members 🌸

• exp_name — the exporter's name, bestie. lowkey just for debugging, but it's the name tag at the party so nobody forgets who brought the buffer. 🏷️
• owner — pointer to the exporter module. this is the refcounting situation for the kernel module — main character energy for lifetime management, no cap.
• ops — you attach the allocator-defined dma buf ops to the new buffer here. the allocator picked these out, you're just delivering them. ✨
• size — size of the buffer. and hear me when I say this: it is invariant over the lifetime of the buffer. it does not change. it will not change. periodt. 📏
• flags — mode flags for the file. the vibe settings, essentially. 🚩
• resv — the reservation-object. if you pass NULL, a default one gets allocated for you. so generous honestly 🫶
• priv — attach the allocator's private data to this buffer. it's their personal stash, you just hold the pointer. 🙈

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👑 Description 👑

fr fr, this structure holds all the information required to export the buffer. that's the whole job. she's used with dma_buf_export only — not with anything else, so don't try to make her something she's not. 💅

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🌈 SEE ALSO 🌈

• Kernel file ./include/linux/dma-buf.h
• struct dma_buf_ops(9)
• struct dma_buf(9)
• struct dma_buf_attach_ops(9)
• struct dma_buf_attachment(9)
• DEFINE_DMA_BUF_EXPORT_INFO(9)
• get_dma_buf(9)
• dma_buf_is_dynamic(9)

like a whole friend group in one header file, obsessed 💖

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and that's the page bestie!! source lives over in ./include/linux, dated October 2026 — so she's from the future, iconic behavior, mwah 💋🦋