netfilter: nft_set_hash: add nft_hash_buckets() (2111515a) · Commits · 戴 / test

Add nft_hash_buckets() helper function to calculate the number of hashtable buckets based on the elements. This function can be reused from the follow up patch to add non-resizable hashtables. Signed-off-by:

Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nft_set_hash.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -363,12 +363,17 @@ static void nft_rhash_destroy(const struct nft_set *set)
		(void *)set);
		}

		static u32 nft_hash_buckets(u32 size)
		{
		return roundup_pow_of_two(size * 4 / 3);
		}

		static bool nft_rhash_estimate(const struct nft_set_desc *desc, u32 features,
		struct nft_set_estimate *est)
		{
		if (desc->size)
		est->size = sizeof(struct nft_rhash) +
		roundup_pow_of_two(desc->size * 4 / 3) *
		nft_hash_buckets(desc->size) *
		sizeof(struct nft_rhash_elem *) +
		desc->size * sizeof(struct nft_rhash_elem);
		else

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