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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.

  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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