Nftables: Remove the overheads from register ops.#12800
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copybara-service[bot] merged 1 commit intomasterfrom Mar 30, 2026
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Nftables: Remove the overheads from register ops.#12800copybara-service[bot] merged 1 commit intomasterfrom
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- Shift register boundary checks from `evaluate`
(hot path) to rule `init` (once at setup).
- Remove `registerData` interfaces with concrete types to
eliminate transient heap allocations and interface overhead
in the evaluation hot path.
- Fix register store validation to match Linux kernel behavior
(net/netfilter/nf_tables_api.c:nft_validate_register_store).
Instead of hard-limiting to 4 or 16 bytes,
we validate against the 64-byte total array limit.
- nft_payload: safeguard signed-unsigned overflow.
PiperOrigin-RevId: 891792589
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Nftables: Remove the overheads from register ops.
evaluate(hot path) to rule
init(once at setup).registerDatainterfaces with concrete types toeliminate transient heap allocations and interface overhead
in the evaluation hot path.
(net/netfilter/nf_tables_api.c:nft_validate_register_store).
Instead of hard-limiting to 4 or 16 bytes,
we validate against the 64-byte total array limit.