STRUCT NFT_PIPAPO_SCRATCH(9)

💅 struct nft_pipapo_scratch(9) 💅

okay so bestie, welcome to the Kernel API Manual — this is the page for struct nft_pipapo_scratch(9) and honestly it's a little cutie. ✨

🌸 NAME 🌸

struct nft_pipapo_scratch — the percpu data used for lookup and matching, no cap 🎀

🦋 SYNOPSIS 🦋

struct nft_pipapo_scratch {
    local_lock_t bh_lock;
    u8 map_index;
    unsigned long __map[];
};

like, that's the whole struct. three members. minimal. iconic. 👑

✨ Members ✨

• bh_lock — a PREEMPT_RT local spinlock 🌀 like yes, it locks, but make it local and make it real-time-friendly.
• map_index — the current working bitmap index 📇 toggled between field matches — it literally switches back and forth as the matching goes down the fields, iykyk.
• __map — where we store partial matching results during lookup 🗂️ a flexible array, just vibing at the end of the struct, holding the in-progress receipts mid-search.

🌈 SEE ALSO 🌈

• the kernel file ./net/netfilter/nft_set_pipapo.h, plus union nft_pipapo_map_bucket(9) 👀
• struct nft_pipapo_field(9)
• struct nft_pipapo_match(9)
• struct nft_pipapo(9)
• struct nft_pipapo_elem(9)
• pipapo_and_field_buckets_4bit(9)
• pipapo_and_field_buckets_8bit(9)
• pipapo_estimate_size(9)
• pipapo_resmap_init(9)

fr fr the whole pipapo family is right there, go read them, they slay 💖

mwah, that's a wrap 🫶 this one came straight out of ./net/netfilter and it's dated October 2026 — bestie, a whole future date, she's booked and busy 💅