netdev - Re: [PATCH net] net: sched: Remove TCA

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Date:   Fri, 26 Oct 2018 18:08:30 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     David Ahern <dsahern@...il.com>
Cc:     David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org,
        davem@...emloft.net, pupilla@...ero.it
Subject: Re: [PATCH net] net: sched: Remove TCA_OPTIONS from policy

Fri, Oct 26, 2018 at 06:02:01PM CEST, dsahern@...il.com wrote:
>On 10/25/18 12:31 AM, Jiri Pirko wrote:
>> Wed, Oct 24, 2018 at 05:32:49PM CEST, dsahern@...nel.org wrote:
>>> From: David Ahern <dsahern@...il.com>
>>>
>>> Marco reported an error with hfsc:
>>> root@...imero:~# tc qdisc add dev eth0 root handle 1:0 hfsc default 1
>>> Error: Attribute failed policy validation.
>>>
>>> Apparently a few implementations pass TCA_OPTIONS as a binary instead
>>> of nested attribute, so drop TCA_OPTIONS from the policy.
>> 
>> Yeah, this is nice example of a case, where I think it wouldn't hurt to
>> be a bit more strict. Apparently, the userspace app is buggy. It should
>> be fixed. Note that I'm aware of the bw compatibility.
>
>Kernel side for hfsc expects TCA_OPTIONS as a binary as well - a struct
>tc_hfsc_qopt. Nothing that can be done.

:(