netdev - Re: [PATCHv4 net-next 08/10] packet: add TP_STATUS_GSO_TCP for tp

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Message-ID: <8e84db42-0774-43ed-9293-e80297ece7b4@gmail.com>
Date:   Wed, 1 Feb 2023 08:32:16 -0700
From:   David Ahern <dsahern@...il.com>
To:     Xin Long <lucien.xin@...il.com>,
        network dev <netdev@...r.kernel.org>
Cc:     davem@...emloft.net, kuba@...nel.org,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Pravin B Shelar <pshelar@....org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Florian Westphal <fw@...len.de>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Ilya Maximets <i.maximets@....org>,
        Aaron Conole <aconole@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        Mahesh Bandewar <maheshb@...gle.com>,
        Paul Moore <paul@...l-moore.com>,
        Guillaume Nault <gnault@...hat.com>
Subject: Re: [PATCHv4 net-next 08/10] packet: add TP_STATUS_GSO_TCP for
 tp_status

On 1/28/23 8:58 AM, Xin Long wrote:
> Introduce TP_STATUS_GSO_TCP tp_status flag to tell the af_packet user
> that this is a TCP GSO packet. When parsing IPv4 BIG TCP packets in
> tcpdump/libpcap, it can use tp_len as the IPv4 packet len when this
> flag is set, as iph tot_len is set to 0 for IPv4 BIG TCP packets.
> 
> Signed-off-by: Xin Long <lucien.xin@...il.com>
> ---
>  include/uapi/linux/if_packet.h | 1 +
>  net/packet/af_packet.c         | 4 ++++
>  2 files changed, 5 insertions(+)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>