linux-kernel - [RFC PATCHv2 net-next 1/3] net/udp: Add a new struct for hash2 slot

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Message-ID: <20240924125101.1688823-1-gur.stavi@huawei.com>
Date: Tue, 24 Sep 2024 15:51:01 +0300
From: Gur Stavi <gur.stavi@...wei.com>
To: <lulie@...ux.alibaba.com>
CC: <antony.antony@...unet.com>, <davem@...emloft.net>, <dsahern@...nel.org>,
	<dust.li@...ux.alibaba.com>, <edumazet@...gle.com>,
	<fred.cc@...baba-inc.com>, <jakub@...udflare.com>, <kuba@...nel.org>,
	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	<pabeni@...hat.com>, <steffen.klassert@...unet.com>,
	<willemdebruijn.kernel@...il.com>, <yubing.qiuyubing@...baba-inc.com>
Subject: [RFC PATCHv2 net-next 1/3] net/udp: Add a new struct for hash2 slot

> @@ -224,13 +224,12 @@ struct sock *__udp6_lib_lookup(const struct net *net,
>  			       struct sk_buff *skb)
>  {
>  	unsigned short hnum = ntohs(dport);
> -	unsigned int hash2, slot2;
>  	struct udp_hslot *hslot2;
>  	struct sock *result, *sk;
> +	unsigned int hash2;
>
>  	hash2 = ipv6_portaddr_hash(net, daddr, hnum);
> -	slot2 = hash2 & udptable->mask;
> -	hslot2 = &udptable->hash2[slot2];
> +	hslot2 = udp_hashslot2(udptable, hash2);
>

Why not minimize the code change by using udptable->hash2[slot2].hslot?
Especially since later you do it in __udp6_lib_mcast_deliver.
I think that many developers would find usage of C primitives more
readable.