linux-kernel - Re: [PATCH v4 net-next v4 2/6] net: add support for segmenting TCP fraglist GSO packets

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Date: Tue, 30 Apr 2024 12:23:56 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Felix Fietkau <nbd@....name>, netdev@...r.kernel.org, Eric Dumazet
 <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>, David Ahern
 <dsahern@...nel.org>, Jakub Kicinski <kuba@...nel.org>
Cc: willemdebruijn.kernel@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 net-next v4 2/6] net: add support for segmenting TCP
 fraglist GSO packets

On Sat, 2024-04-27 at 20:22 +0200, Felix Fietkau wrote:
> @@ -37,6 +101,9 @@ static struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
>  	if (!pskb_may_pull(skb, sizeof(struct tcphdr)))
>  		return ERR_PTR(-EINVAL);
>  
> +	if (skb_shinfo(skb)->gso_type & SKB_GSO_FRAGLIST)
> +		return __tcp4_gso_segment_list(skb, features);

I'm sorry for the incremental feedback, I almost forgot.

Possibly the above condition could deserve an unlikely() annotation?
less relevant than for GRO case, but at least we have consistent
handling of such flag.

Thanks!

Paolo