netdev - Re: [patch iproute2-next v2] devlink: add reload failed indication

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Date:   Wed, 18 Sep 2019 22:23:50 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     David Ahern <dsahern@...il.com>
Cc:     netdev@...r.kernel.org, stephen@...workplumber.org,
        idosch@...lanox.com, jakub.kicinski@...ronome.com,
        tariqt@...lanox.com, mlxsw@...lanox.com
Subject: Re: [patch iproute2-next v2] devlink: add reload failed indication

Wed, Sep 18, 2019 at 10:01:31PM CEST, dsahern@...il.com wrote:
>On 9/18/19 1:37 AM, Jiri Pirko wrote:
>> Wed, Sep 18, 2019 at 01:46:13AM CEST, dsahern@...il.com wrote:
>>> On 9/17/19 12:36 PM, Jiri Pirko wrote:
>>>> Tue, Sep 17, 2019 at 06:46:31PM CEST, dsahern@...il.com wrote:
>>>>> On 9/16/19 3:44 AM, Jiri Pirko wrote:
>>>>>> From: Jiri Pirko <jiri@...lanox.com>
>>>>>>
>>>>>> Add indication about previous failed devlink reload.
>>>>>>
>>>>>> Example outputs:
>>>>>>
>>>>>> $ devlink dev
>>>>>> netdevsim/netdevsim10: reload_failed true
>>>>>
>>>>> odd output to user. Why not just "reload failed"?
>>>>
>>>> Well it is common to have "name value". The extra space would seem
>>>> confusing for the reader..
>>>> Also it is common to have "_" instead of space for the output in cases
>>>> like this.
>>>>
>>>
>>> I am not understanding your point.
>>>
>>> "reload failed" is still a name/value pair. It is short and to the point
>>> as to what it indicates. There is no need for the name in the uapi (ie.,
>>> the name of the netlink attribute) to be dumped here.
>> 
>> Ah, got it. Well it is a bool value, that means it is "true" or "false".
>> In json output, it is True of False. App processing json would have to
>> handle this case in a special way.
>> 
>
>Technically it is a u8. But really I do not understand why it is
>RELOAD_FAILED and not RELOAD_STATUS which is more generic and re-usable.
>e.g,. 'none', 'failed', 'success'.

I was thinking about that. But I was not able to figure out any other
possible values. So it is bool. For indication of some other status,
there would have to be independent bool/othertype anyway.