STRUCT LIBETH_FQ(9)

💖 struct libeth_fq(9) 💖

okay so bestie, welcome to the manual page for struct libeth_fq, straight out of the Kernel API Manual — yes, the kernel has a manual, and yes, it's giving legendary. this one's all about a struct that represents a buffer (fill) queue 🎀

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✨ NAME ✨

struct libeth_fq — the struct that represents a buffer (fill) queue. that's it, that's the vibe 🦋

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🌸 SYNOPSIS 🌸

here's the whole thing, exactly as it lives, no edits, no cap:

struct libeth_fq {
    struct {
      struct page_pool        *pp;
      struct libeth_fqe       *fqes;
      u32 truesize;
      u32 count;
    };
    enum libeth_fqe_type    type:2;
    bool hsplit:1;
    bool xdp:1;
    bool no_napi:1;
    u32 buf_len;
    int nid;
 };

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🫶 Members 🫶

not me listing every single member, because missing one would be a crime 💅

• {unnamed_struct} — anonymous. it's literally an anonymous struct, no name, mysterious main character energy 🙈
• pp — the page_pool for buffer management. it handles the buffer logistics, iykyk.
• fqes — array of Rx buffers. the whole lineup ✨
• truesize — size to allocate per buffer, w/overhead — note that overhead is included, so don't forget it bestie 😭
• count — number of descriptors/buffers the queue has. count them, king 👑
• type — type of the buffers this queue has. it's an enum libeth_fqe_type and it's only taking :2 bits, lowkey efficient.
• hsplit — flag whether header split is enabled. one whole :1 bit of information 🌸
• xdp — flag indicating whether XDP is enabled. also :1 bit, also iconic.
• no_napi — the queue is not a data queue and does not have NAPI. love that for it 💀
• buf_len — HW-writeable length per each buffer. hardware writes here, so it matters fr fr.
• nid — ID of the closest NUMA node with memory. gotta stay close to your memory, literally 🧚

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💜 SEE ALSO 💜

go read these next, bestie, they're all family:

• Kernel file ./include/net/libeth/rx.h
• struct libeth_fqe(9)
• enum libeth_fqe_type(9)
• libeth_rx_alloc(9)
• libeth_rx_sync_for_cpu(9)
• struct libeth_rx_csum(9)
• struct libeth_rqe_info(9)
• libeth_rx_pt_get_ip_ver(9)
• libeth_rx_pt_set_hash(9)

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okay that's the whole page, you ate that 🍓 this legend lives at ./include/net/libeth and it's dated October 2026 — yes, the future, we're just that ahead. bye bestie, go read struct libeth_fqe(9) next 💖✨