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Date:	Mon, 14 Apr 2014 19:14:38 -0400
From:	Jamal Hadi Salim <>
To:	Cong Wang <>
CC:	Stephen Hemminger <>,
	Linux Kernel Network Developers <>,
	David Miller <>
Subject: Re: [Patch iproute2] u32: add terminal parameter

On 04/14/14 17:18, Cong Wang wrote:
> On Sat, Apr 12, 2014 at 4:43 AM, Jamal Hadi Salim <> wrote:

> Why? The qdisc my u32 filters attached to is classless (ingress).

flowid is a filter id. I am almost certain it was a mistake on your
part to leave it out. This is why i called it an FAQ and suggested
you provide a patch to block people from leaving it out.

> Also, why this is relevant to u32 terminal?

Because if you defined a flowid you are defining it as a terminal
u32 node. You wouldnt have to complain about "???" or produce a patch
to solve a non-existent problem.
You want to add a new syntax and didnt even bother to look at the code?

>> So I agree with Stephen on the verdict on your patch.
>> We need a patch to avoid this FAQ problem since it happens
>> often i.e reject a filter that doesnt have flow/classid
>> specified. How about you provide that patch instead?
> Even if you were right, it is too late to change, we obviously don't
> want to break existing scripts that work fine. I am pretty sure
> my script runs well without flowid.

I dont think it can be guaranteed to work at all if you dont specify
a flowid. You may have gotten lucky.

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