nft_pipapo_a...lookup_4b_12(9)

📦 version 7.3.1, in nixpkgs unstable

💅 nft_pipapo_avx2_lookup_4b_12 — NAME ✨

okay so bestie, this is nft_pipapo_avx2_lookup_4b_12 from the Kernel API Manual, and it is literally the AVX2-based lookup for 12 four-bit groups. twelve. four-bit. groups. she's doing the absolute most and we love her for it 🎀

🌸 SYNOPSIS 🌸

int nft_pipapo_avx2_lookup_4b_12 (unsigned long *map , unsigned long *fill , const struct nft_pipapo_field *f , int offset , const u8 *pkt , bool first , bool last );

like, seven args, no notes, she's an icon and she knows it 🫶

✨ ARGUMENTS ✨

  • map — the previous match result, used as the initial bitmap. think of it as the receipts from last time 💅
  • fill — destination bitmap that gets filled up with the current match result. she's the empty cup, pour the results in 🍓
  • f — the field, containing lookup and mapping tables. the whole vibe lives in here
  • offset — ignore buckets before the given index; no bits are filled there. skip the intro, get to the good part 🙈
  • pkt — packet data, and it's a pointer to the input nftables register. the actual tea ☕
  • first — if this is the first field, don't source the previous result. fresh start energy, no baggage 🌈
  • last — last field: stop at the first match and return the bit index. she said i'm done here, periodt 💀

🦋 DESCRIPTION 🦋

see nft_pipapo_avx2_lookup_4b_2. that's the whole lore drop, go read her sister's page iykyk 📖

this one is used for 48-bit fields (i.e. MAC addresses / EUI-48). forty-eight bits of main character energy, no cap 👑

🎀 RETURN 🎀

  • -1 on no match 😭
  • rule index of match if last 🔥
  • otherwise, the first long word index to be checked next (i.e. first filled word) ⭐

💜 SEE ALSO 💜

okay that's the page bestie, mwah 💖 she lives in ./net/netfilter, dated October 2026, and the manual label on her birth certificate is nft_pipapo_a...lookup_4b_12(9) — that's it, that's the whole thing, slay 💅✨

📦 where this page comes from