libeth_xsk_xmit_fill_buf(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 libeth_xsk_xmit_fill_buf(9) 🎀

okay bestie, we’re in the Kernel API Manual and this page is libeth_xsk_xmit_fill_buf(9) — yes, the (9) section, periodt. It’s giving kernel-internals main character energy, but lowkey it’s a helper doing prep work. 🦋

🌸 NAME 🌸

libeth_xsk_xmit_fill_buf — internal helper to prepare an XSk xmit. That’s the whole vibe: internal helper, not the final boss. 💅

✨ SYNOPSIS ✨

struct libeth_xdp_tx_desc libeth_xsk_xmit_fill_buf (struct
libeth_xdp_tx_frame frm , u32 i , const struct libeth_xdpsq *sq , u64
priv );

💖 ARGUMENTS 💖

  • frm — the xdp_desc from the XSk buffer pool, cute.
  • i — index on the HW queue.
  • sq — the XDPSQ abstraction for the queue.
  • priv — XSk Tx metadata ops.

🧚 DESCRIPTION 🧚

okay so here’s the tea: depending on the metadata ops presence — and that presence is determined at compile time — this calls the quickest helper to build a libeth XDP Tx descriptor. No cap, that’s the whole description. It’s not out here doing extra lore; it’s picking the fastest helper for the compiled situation. 🫶

🔥 RETURN 🔥

It returns an XDP Tx descriptor with the synced DMA, the metadata request bits, and other info to pass to the driver callback. So like: descriptor + DMA synced + metadata request bits + extra info for the driver callback. Slay. ✨

👑 SEE ALSO 👑

Kernel file: ./include/net/libeth/xsk.h — yes, that exact path, bestie. 💖

Cute sign-off: source/version is ./include/net/libeth, date is October 2026, and this is the libeth_xsk_xmit_fill_buf(9) page. Bye bestie, mwah 💋🌈

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