From: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
To: Paul Blakey <paulb@mellanox.com>
Cc: "Toke Høiland-Jørgensen" <toke@redhat.com>,
"Jiri Pirko" <jiri@mellanox.com>, "Roi Dayan" <roid@mellanox.com>,
"Yossi Kuperman" <yossiku@mellanox.com>,
"Oz Shlomo" <ozsh@mellanox.com>,
"Marcelo Ricardo Leitner" <marcelo.leitner@gmail.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"David Miller" <davem@davemloft.net>,
"Aaron Conole" <aconole@redhat.com>,
"Zhike Wang" <wangzhike@jd.com>,
"Rony Efraim" <ronye@mellanox.com>,
"nst-kernel@redhat.com" <nst-kernel@redhat.com>,
"John Hurley" <john.hurley@netronome.com>,
"Simon Horman" <simon.horman@netronome.com>,
"Justin Pettit" <jpettit@ovn.org>
Subject: Re: [PATCH net-next 1/3] net/sched: Introduce action ct
Date: Thu, 13 Jun 2019 11:00:37 +0000 [thread overview]
Message-ID: <6417F7F3-51F5-4384-B01F-00976D135BE2@darbyshire-bryant.me.uk> (raw)
In-Reply-To: <da87a939-9000-8371-672a-a949f834caea@mellanox.com>
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> On 11 Jun 2019, at 16:15, Paul Blakey <paulb@mellanox.com> wrote:
>
>
> On 6/11/2019 4:59 PM, Toke Høiland-Jørgensen wrote:
>> Paul Blakey <paulb@mellanox.com> writes:
>>
>>> Allow sending a packet to conntrack and set conntrack zone, mark,
>>> labels and nat parameters.
>> How is this different from the newly merged ctinfo action?
>>
>> -Toke
>
> Hi,
>
> ctinfo does one of two very specific things,
>
> 1) copies DSCP values that have been placed in the firewall conntrack
> mark back into the IPv4/v6 diffserv field
>
> 2) copies the firewall conntrack mark to the skb's mark field (like
> act_connmark)
It can do both at the same time if required, taking advantage of the single
conntrack entry lookup for both packet/skb mangling operations, but this isn’t
relevant to the discussion really.
>
> Originally ctinfo action was named conndscp (then conntrack, which is
> what our ct shorthand stands for).
>
> We also talked about merging both at some point, but they seem only
> coincidentally related.
>
> don't know how it was then be agreed to be named ctinfo suggesting it
> does something else but the above.
I’m a newbie around here so trying to fit in. conndscp did one thing, then it
suggested that as it was doing a similar lookup to act_connmark that the connmark
functionality could also be integrated. There was a brief flirtation with a
new ‘act ct’ it sort of ‘fell out’ that they were only semi-related in function
by name only.
conndscp was clearly the wrong name for what act_ctinfo had become, amalgamating
two functions, so I thought it’s a “conntrack information lookup/user/extractor/mangler’
and thought ‘ctinfo’ was as good as anything - and nobody screamed and AFAIK no
kittens died :-)
But as a newbie around here I’m happy to fit in with whatever consensus is reached
as long as it is reached.
>
> This action sends packets to conntrack, configures nat, and doesn't get
> "info" from conntrack, while the ctinfo already expects packets to be
> passed conntrack
>
> by some other kernel mechanism.
>
Yeah, one is pulling, the other is pushing :-)
Kevin
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next prev parent reply other threads:[~2019-06-13 15:31 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-11 13:28 [PATCH net-next 0/3] net/sched: Introduce tc connection tracking Paul Blakey
2019-06-11 13:28 ` [PATCH net-next 1/3] net/sched: Introduce action ct Paul Blakey
2019-06-11 13:59 ` Toke Høiland-Jørgensen
2019-06-11 14:15 ` Paul Blakey
2019-06-11 15:34 ` Toke Høiland-Jørgensen
2019-06-11 15:53 ` Marcelo Ricardo Leitner
2019-06-11 20:23 ` Toke Høiland-Jørgensen
2019-06-13 13:46 ` Paul Blakey
2019-06-13 14:08 ` Toke Høiland-Jørgensen
2019-06-14 18:07 ` Cong Wang
2019-06-14 19:24 ` Marcelo Ricardo Leitner
2019-06-18 16:03 ` Cong Wang
2019-06-20 7:32 ` Paul Blakey
2019-06-24 17:46 ` Cong Wang
2019-06-13 11:00 ` Kevin Darbyshire-Bryant [this message]
2019-06-12 18:04 ` Marcelo Ricardo Leitner
2019-06-13 13:44 ` Paul Blakey
2019-06-12 19:55 ` Florian Westphal
2019-06-13 13:39 ` Paul Blakey
2019-06-13 10:16 ` Davide Caratti
2019-06-13 10:49 ` Davide Caratti
2019-06-13 13:40 ` Paul Blakey
2019-06-14 18:02 ` Cong Wang
2019-06-16 7:29 ` Paul Blakey
2019-06-19 18:33 ` Marcelo Ricardo Leitner
2019-06-20 7:07 ` Paul Blakey
2019-06-11 13:28 ` [PATCH net-next 2/3] net/flow_dissector: add connection tracking dissection Paul Blakey
2019-06-11 13:28 ` [PATCH net-next 3/3] net/sched: cls_flower: Add matching on conntrack info Paul Blakey
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