From: Florian Westphal <fw@strlen.de>
To: Jack Ma <Jack.Ma@alliedtelesis.co.nz>
Cc: "netfilter-devel@vger.kernel.org" <netfilter-devel@vger.kernel.org>
Subject: Re: conntrack enhancement
Date: Tue, 16 Jan 2018 15:17:12 +0100 [thread overview]
Message-ID: <20180116141712.GC15198@breakpoint.cc> (raw)
In-Reply-To: <89a1d74339b14c6e813ccbea864c24e0@svr-chch-ex1.atlnz.lc>
Jack Ma <Jack.Ma@alliedtelesis.co.nz> wrote:
> Hi there,
>
> I am planing to add new user option to allow connmark to be shifted to enable more advanced routing options.
>
> Currently, it might be something like:
>
> Conntrack parameters and options:
>
> -sl, --shift-left bits shift mark by n bit to the left
> -sr, --shift-right bits shift mark by n bit to the right.
>
> We run out of nfmark (skb->mark) in our systems due to increasing number of routes we are supporting.
I suspect this is for -j CONNMARK --restore-mark / --save-mark ?
What would this do?
Something like
skb->mark = ct->mark >> $lshift; ?
ct->mark = skb->mark >> $lshift; ?
I don't really understand how this is supposed to work.
Could you elaborate a bit?
Thanks.
next prev parent reply other threads:[~2018-01-16 14:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-16 2:26 conntrack enhancement Jack Ma
2018-01-16 14:17 ` Florian Westphal [this message]
2018-01-23 1:16 ` Jack Ma
2018-01-25 2:34 ` Jack Ma
[not found] ` <20180125062211.GE14192@breakpoint.cc>
2018-01-25 21:31 ` Jack Ma
2018-02-06 23:46 ` shift by n bits while performing '--restore-mark' Jack Ma
2018-02-06 23:53 ` Florian Westphal
2018-02-15 4:13 ` Jack Ma
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