netdev - Re: [PATCH iproute2 net-next] iplink: add support for protodown reason

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Message-ID: <20200821183002.7bfc7aa0@hermes.lan>
Date:   Fri, 21 Aug 2020 18:30:02 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Roopa Prabhu <roopa@...dia.com>
Cc:     Roopa Prabhu <roopa@...ulusnetworks.com>, <dsahern@...il.com>,
        <netdev@...r.kernel.org>
Subject: Re: [PATCH iproute2 net-next] iplink: add support for protodown
 reason

On Fri, 21 Aug 2020 14:09:14 -0700
Roopa Prabhu <roopa@...dia.com> wrote:

> On 8/20/20 10:18 PM, Roopa Prabhu wrote:
> >
> > On 8/20/20 9:36 PM, Stephen Hemminger wrote:  
> >>
> >>
> >> On Thu, 20 Aug 2020 20:52:02 -0700
> >> Roopa Prabhu <roopa@...ulusnetworks.com> wrote:
> >>  
> >>> +     if (tb[IFLA_PROTO_DOWN]) {
> >>> +             if (rta_getattr_u8(tb[IFLA_PROTO_DOWN]))
> >>> +                     print_bool(PRINT_ANY,
> >>> +                                "proto_down", " protodown on ", true);  
> >> In general my preference is to use print_null() for presence flags.
> >> Otherwise you have to handle the false case in JSON as a special case.  
> >
> >
> > ok, i will look. But this is existing code moved into a new function and
> > has been
> >
> > working fine for years.  
> 
> 
> looked at print_null and switching to that results in a change in output 
> for existing protodown
> 
> attribute, so I plan to leave it as is for now.
> 

Sure we should really try and have some consistency in the JSON output.
Maybe a JSON style guide is needed, I wonder if some heavy JSON user already
has one?