netdev - Re: [PATCH net-next 0/2] Ease nsid allocation

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Date:   Wed, 2 Oct 2019 10:46:03 +0200
From:   Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:     David Miller <davem@...emloft.net>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/2] Ease nsid allocation

Le 02/10/2019 à 03:20, David Miller a écrit :
> From: Nicolas Dichtel <nicolas.dichtel@...nd.com>
> Date: Mon, 30 Sep 2019 18:02:12 +0200
> 
>> The goal of the series is to ease nsid allocation from userland.
>> The first patch is a preparation work and the second enables to receive the
>> new nsid in the answer to RTM_NEWNSID.
> 
> The new reply message could break existing apps.
> 
> If an app only performs netnsid operations, and fills up the receive
> queue because it isn't reading these new replies (it had no reason to,
> they didn't exist previously), operations will start failing that
> would not fail previously because the receive queue is full.
Yes I see the problem. I was wondering if this was acceptable because the nl ack
is sent at the end. But nl ack are optional :/

> 
> Given this, I don't see how we can make the change.
> 
Is a new flag attribute ok to turn on this reply?


Thank you,
Nicolas