netdev - Re: [PATCH v3 1/5] netlink: extended ACK reporting

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Message-ID: <9a68aa01-474c-7054-30c2-473ee1250abe@cumulusnetworks.com>
Date:   Tue, 11 Apr 2017 08:25:57 -0600
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Johannes Berg <johannes@...solutions.net>,
        Pablo Neira Ayuso <pablo@...filter.org>
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Benc <jbenc@...hat.com>, jiri@...nulli.us
Subject: Re: [PATCH v3 1/5] netlink: extended ACK reporting

On 4/11/17 1:02 AM, Johannes Berg wrote:
> On Tue, 2017-04-11 at 08:59 +0200, Pablo Neira Ayuso wrote:
>> CAP_ACK means: trim off the payload that the netlink error message
>> is embedding, just like ICMP error does.
>>
>> What is exactly your concern? If the user explicitly requests this
>> via socket option for this socket, then we're expecting they do the
>> right handling for what they're asking for.
> 
> I think David's concern was that when you want to parse the ACK in a
> library (or application), you may not easily know if the application
> (or library) requested capping.

exactly.