nft_pipapo_avx2_lookup_8b_1(9)

💅 nft_pipapo_avx2_lookup_8b_1 — Kernel API Manual ✨

okay so bestie, welcome to the nft_pipapo_avx2_lookup_8b_1(9) page, straight out of the Kernel API Manual 🎀 this is the AVX2-based lookup for one eight-bit group and honestly? she's iconic for it 💖

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🌸 NAME 🌸

nft_pipapo_avx2_lookup_8b_1 — AVX2-based lookup for one eight-bit group 🦋

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✨ SYNOPSIS ✨

int nft_pipapo_avx2_lookup_8b_1 (unsigned long *map , unsigned long
*fill , const struct nft_pipapo_field *f , int offset , const u8 *pkt ,
bool first , bool last );

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🎀 ARGUMENTS 🎀

• map — previous match result, used as the initial bitmap. it's giving "we remember what happened last time" energy 💭
• fill — the destination bitmap that gets filled with the current match result. this one's the main character of the output 🫶
• f — the field, containing lookup and mapping tables. all the tables live here bestie 📚
• offset — ignore buckets before the given index, no bits are filled there. like, we simply do not look at those 🙈
• pkt — packet data, pointer to input nftables register. the actual vibes we're checking 🔍
• first — if this is the first field, don't source previous result. no borrowing from the past, periodt ✋
• last — last field: stop at the first match and return bit index. first match wins and we're out 🏁

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💜 DESCRIPTION 💜

See nft_pipapo_avx2_lookup_4b_2. that's the lore, go read it iykyk 📖

This is used for 8-bit fields (i.e. protocol numbers). yes, like protocol numbers — that's the whole assignment 🔥

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⭐ RETURN ⭐

• -1 on no match 😭
• rule index of match if the last flag is set 👑
• otherwise, the first long word index to be checked next (i.e. first filled word) — that's your next stop, bestie 🚀

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🌈 SEE ALSO 🌈

• Kernel file ./net/netfilter/nft_set_pipapo_avx2.c
• nft_pipapo_avx2_prepare(9), nft_pipapo_avx2_fill(9), nft_pipapo_avx2_refill(9), nft_pipapo_avx2_lookup_4b_2(9), nft_pipapo_avx2_lookup_4b_4(9), nft_pipapo_avx2_lookup_4b_8(9), nft_pipapo_avx2_lookup_4b_12(9), nft_pipapo_avx2_lookup_4b_32(9), nft_pipapo_avx2_lookup_8b_2(9), nft_pipapo_avx2_lookup_8b_4(9), nft_pipapo_avx2_lookup_8b_6(9), nft_pipapo_avx2_lookup_8b_16(9), nft_pipapo_avx2_lookup_slow(9), nft_pipapo_avx2_estimate(9), pipapo_resmap_init_avx2(9), pipapo_get_avx2(9), nft_pipapo_avx2_lookup(9)

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and that's the whole page bestie, no cap 💀💖 this came from ./net/netfilter, dated October 2026, and it's nft_pipapo_avx2_lookup_8b_1(9) — slay, go read the source, periodt 🧚‍♀️🌸