netdev - Re: tc: show format ABI changed

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Date:	Thu, 09 Dec 2010 02:18:14 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	David Miller <davem@...emloft.net>,
	Jarek Poplawski <jarkao2@...il.com>, netdev@...r.kernel.org
Subject: Re: tc: show format ABI changed

Le mercredi 08 décembre 2010 à 14:51 -0800, Stephen Hemminger a écrit :
> Although well intentioned, the following patch should have not
> been applied since it changes the kernel ABI. It broke some scripts
> parsing the output format of tc commands.
> 
> Before HTB would report bogus zero values, now it reports
> nothing and that changes the output format.  Like the empty
> fields in /proc, I argue we can't play fast and loose with
> netlink responses.
> 
> Not a big deal to fix the script in this case, in this case
> so don't revert it.

Thanks.

I really prefer not giving false information to user.

If you change tc, please add an option so that user can ask tc not
invent "zero values"



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