libeth_xdp_xmit_frame_dma(9)

📦 version 7.3.1, in nixpkgs unstable

💅 libeth_xdp_xmit_frame_dma 💅

okay bestie, welcome to the Kernel API Manual ✨ this one's a tiny little internal helper — libeth_xdp_xmit_frame_dma — and honestly it's giving "small but crucial" main character energy 👑

🌸 NAME 🌸

libeth_xdp_xmit_frame_dma — an internal helper that gets you access to the DMA of an &xdp_frame 🎀

✨ SYNOPSIS ✨

libeth_xdp_xmit_frame_dma (xf );

(no cap, that's literally the whole call — one argument, one vibe check 💅)

🦋 ARGUMENTS 🦋

  • xf — a pointer to the XDP frame 🌈 that's it, that's the whole input, she's low maintenance

💖 DESCRIPTION 💖

so here's the situation: there's no place inside libeth_xdp_tx_frame to store the DMA address for an xdp_frame head 😭 like, nowhere. not a single slot. tragic.

so what do we do? we use the headroom 🫶 the address gets placed right after the frame struct, and it's naturally aligned — so it just slides in there all cute and correct ✨

👑 RETURN 👑

a pointer to the DMA address you should use 💜 that's the whole gift, bestie 🎁

🧚 SEE ALSO 🧚

the whole friend group, no one left out fr fr 💀 — plus the kernel file ./include/net/libeth/xdp.h:

and that's the whole page, bestie, you ate it up 🍓 source lives at ./include/net/libeth, dated October 2026 — mwah, go read some XDP code 💋🌷

📦 where this page comes from