linux-kernel - Re: [PATCH v3 1/1] nft_ct: Added nfct_seqadj_ext

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Message-ID: <CANhDHd_xhYxWOzGxmumnUk1f6gSWZYCahg0so+AzOE3i12bL9A@mail.gmail.com>
Date: Thu, 23 Oct 2025 14:28:06 +0200
From: Andrii Melnychenko <a.melnychenko@...s.io>
To: Florian Westphal <fw@...len.de>
Cc: Pablo Neira Ayuso <pablo@...filter.org>, kadlec@...filter.org, phil@....cc, 
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, 
	horms@...nel.org, netfilter-devel@...r.kernel.org, coreteam@...filter.org, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] nft_ct: Added nfct_seqadj_ext_add() for NAT'ed conntrack.

Hi all,

I've taken a look at the `nat_ftp` test from nftables. It actually
passes fine, I've tried to modify the test, add IPv4 and force
PASV/PORT mode - everything works.
Currently, I'm studying the difference between NFT rulesets.
Primarily, I'm testing on 2 kernels: 6.6.108 and 6.14.0-33.


On Wed, Oct 22, 2025 at 3:01 PM Andrii Melnychenko
<a.melnychenko@...s.io> wrote:
>
> Hi all,
>
> > BTW, this fixes DNAT case, but SNAT case is still broken because flag
> > is set at a later stage, right?
>
> I've checked SNAT with the "PORT" FTP command - didn't reproduce the bug.
> I assume that `nft_nat_eval()` -> `nf_nat_setup_info()` sets up seqadj
> for the SNAT case.



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