From: David Ahern <dsahern@gmail.com>
To: Xin Long <lucien.xin@gmail.com>, network dev <netdev@vger.kernel.org>
Cc: davem@davemloft.net, kuba@kernel.org,
Eric Dumazet <edumazet@google.com>,
Paolo Abeni <pabeni@redhat.com>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Pravin B Shelar <pshelar@ovn.org>,
Jamal Hadi Salim <jhs@mojatatu.com>,
Cong Wang <xiyou.wangcong@gmail.com>,
Jiri Pirko <jiri@resnulli.us>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Florian Westphal <fw@strlen.de>,
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>,
Ilya Maximets <i.maximets@ovn.org>,
Aaron Conole <aconole@redhat.com>,
Roopa Prabhu <roopa@nvidia.com>,
Nikolay Aleksandrov <razor@blackwall.org>,
Mahesh Bandewar <maheshb@google.com>,
Paul Moore <paul@paul-moore.com>,
Guillaume Nault <gnault@redhat.com>
Subject: Re: [PATCHv4 net-next 00/10] net: support ipv4 big tcp
Date: Wed, 1 Feb 2023 08:39:17 -0700 [thread overview]
Message-ID: <4445718f-85d6-5ae6-209f-b3e402d483fa@gmail.com> (raw)
In-Reply-To: <cover.1674921359.git.lucien.xin@gmail.com>
On 1/28/23 8:58 AM, Xin Long wrote:
> This is similar to the BIG TCP patchset added by Eric for IPv6:
>
> https://lwn.net/Articles/895398/
>
> Different from IPv6, IPv4 tot_len is 16-bit long only, and IPv4 header
> doesn't have exthdrs(options) for the BIG TCP packets' length. To make
> it simple, as David and Paolo suggested, we set IPv4 tot_len to 0 to
> indicate this might be a BIG TCP packet and use skb->len as the real
> IPv4 total length.
>
> This will work safely, as all BIG TCP packets are GSO/GRO packets and
> processed on the same host as they were created; There is no padding
> in GSO/GRO packets, and skb->len - network_offset is exactly the IPv4
> packet total length; Also, before implementing the feature, all those
> places that may get iph tot_len from BIG TCP packets are taken care
> with some new APIs:
>
Thanks for working on this.
next prev parent reply other threads:[~2023-02-01 15:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-28 15:58 [PATCHv4 net-next 00/10] net: support ipv4 big tcp Xin Long
2023-01-28 15:58 ` [PATCHv4 net-next 01/10] net: add a couple of helpers for iph tot_len Xin Long
2023-02-01 15:31 ` David Ahern
2023-01-28 15:58 ` [PATCHv4 net-next 02/10] bridge: use skb_ip_totlen in br netfilter Xin Long
2023-01-31 15:01 ` Nikolay Aleksandrov
2023-01-28 15:58 ` [PATCHv4 net-next 03/10] openvswitch: use skb_ip_totlen in conntrack Xin Long
2023-02-01 13:29 ` Aaron Conole
2023-01-28 15:58 ` [PATCHv4 net-next 04/10] net: sched: use skb_ip_totlen and iph_totlen Xin Long
2023-01-28 15:58 ` [PATCHv4 net-next 05/10] netfilter: " Xin Long
2023-01-28 15:58 ` [PATCHv4 net-next 06/10] cipso_ipv4: use iph_set_totlen in skbuff_setattr Xin Long
2023-01-28 15:58 ` [PATCHv4 net-next 07/10] ipvlan: use skb_ip_totlen in ipvlan_get_L3_hdr Xin Long
2023-01-28 15:58 ` [PATCHv4 net-next 08/10] packet: add TP_STATUS_GSO_TCP for tp_status Xin Long
2023-02-01 15:32 ` David Ahern
2023-01-28 15:58 ` [PATCHv4 net-next 09/10] net: add gso_ipv4_max_size and gro_ipv4_max_size per device Xin Long
2023-01-31 14:59 ` Paolo Abeni
2023-01-31 17:55 ` Xin Long
2023-02-01 15:36 ` David Ahern
2023-01-28 15:58 ` [PATCHv4 net-next 10/10] net: add support for ipv4 big tcp Xin Long
2023-02-01 15:38 ` David Ahern
2023-02-02 9:24 ` [PATCHv4 net-next 10/10] net: add support for ipv4 big tcp: manual merge Matthieu Baerts
2023-02-01 8:53 ` [PATCHv4 net-next 00/10] net: support ipv4 big tcp Eric Dumazet
2023-02-01 15:39 ` David Ahern [this message]
2023-02-02 5:10 ` patchwork-bot+netdevbpf
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