nft_pipapo_avx2_lookup_8b_2(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 nft_pipapo_avx2_lookup_8b_2 — NAME 💅

okay so bestie, welcome to the Kernel API Manual ✨ and lemme introduce you to nft_pipapo_avx2_lookup_8b_2 — the AVX2-based lookup for 2 eight-bit groups. that's it, that's the whole vibe. she does lookups, she does them with AVX2, she handles two eight-bit groups at a time, and she absolutely ate 🎀

✨ SYNOPSIS ✨

int nft_pipapo_avx2_lookup_8b_2 (unsigned long *map , unsigned long *fill , const struct nft_pipapo_field *f , int offset , const u8 *pkt , bool first , bool last );

like, look at that signature. seven whole parameters. she's got range 🫶

🦋 ARGUMENTS 🦋

  • map — the previous match result, and she's used as the initial bitmap. think of it as the receipts from last time, still valid 👑
  • fill — the destination bitmap, aka where the current match result gets poured into. she's the empty cup, bestie 🍓
  • f — the field itself, and bestie she is packed: she contains the lookup and mapping tables 🌈
  • offset — ignore every bucket before this index, and no bits get filled in there. like, we're not even looking at those, periodt 🙈
  • pkt — the packet data, aka a pointer to the input nftables register. the actual material we're working with 💖
  • first — if this is the very first field, do not source the previous result. fresh start energy, main character behavior ⭐
  • last — last field!! stop at the first match and return that bit index. she's done, she's out, she's closing the group chat 💀

🧚 DESCRIPTION 🧚

okay so the actual explanation: see nft_pipapo_avx2_lookup_4b_2. that's the reference, go read her, she's iconic 💅

this one right here is used for 16-bit fields — i.e. ports 👑 and that's genuinely the whole description, no cap.

🔥 RETURN 🔥

  • -1 on no match 😭 (she looked, she found nothing, it happens)
  • the rule index of the match if last is set 🎉
  • otherwise, the first long word index to be checked next — i.e. the first filled word — so you know where to look next, iykyk 🌸

💜 SEE ALSO 💜

the whole friend group, honestly 🫶✨

aaaand that's the page!! this one lives in ./net/netfilter, dated October 2026, and the header up top says nft_pipapo_avx2_lookup_8b_2(9) — the full manual name is the Kernel API Manual, in case you were wondering 💖 bye bestie, go match some ports 🎀🦋

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