libeth_xdp_init_buff(9)

📦 version 7.3.1, in nixpkgs unstable

💅 libeth_xdp_init_buff(9) — the Kernel API Manual said "let's get this buffer ready" ✨

okay bestie, so this is a page straight out of the Kernel API Manual, and the star of the show is libeth_xdp_init_buff. Yes, that's a whole mouthful, but it's literally just a "prepare the buffer before the party starts" function. Let's go 🎀

🌸 NAME

libeth_xdp_init_buff — initialize a &libeth_xdp_buff for Rx NAPI poll (yep, that's the whole gig 💖)

✨ SYNOPSIS

void libeth_xdp_init_buff (struct libeth_xdp_buff *dst , const struct
libeth_xdp_buff_stash *src , struct xdp_rxq_info *rxq );

no return value, it's a void girlie — she does the work and she does NOT report back 🫶

💜 ARGUMENTS

  • dst — the on-stack buffer you're initializing. She's right there, on the stack. Iconic.
  • src — the XDP buffer stash that got parked on the queue. Like a little pre-saved snack for later 🍓
  • rxq — the registered xdp_rxq_info that corresponds to this queue. Every queue has one, no exceptions, periodt.

🔥 DESCRIPTION

Call this before the main NAPI polling loop, bestie. Not during. Not after. Before 💀

What it does: it loads up the content from the stash you saved earlier — OR it initializes the buffer from scratch if there's nothing saved. Either way, when this returns, your buffer is ready to go out into the world.

⚠️ Do not use for XSk. Like, at all. That's a hard no, no cap. Do not pass XSk through this. 🚫

🦋 SEE ALSO

Honestly? The friend group is huge. Here's literally everyone:

...and also go peek at the kernel file ./include/net/libeth/xdp.h if you want the source tea ☕ iykyk

and that's the whole page, babe 💫

this fab little writeup lives at ./include/net/libeth, dated October 2026, and it's literally titled libeth_xdp_init_buff(9) — catch you in the next man page, mwah 😘🎀

📦 where this page comes from