netdev - Re: [PATCH iproute2 2/2] devlink: add batch command support

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Message-ID: <20171112081923.GV18825@mtr-leonro.local>
Date:   Sun, 12 Nov 2017 10:19:23 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     Ivan Vecera <ivecera@...hat.com>, netdev@...r.kernel.org,
        jiri@...lanox.com, arkadis@...lanox.com
Subject: Re: [PATCH iproute2 2/2] devlink: add batch command support

On Sun, Nov 12, 2017 at 06:06:42AM +0100, Jiri Pirko wrote:
> Fri, Nov 10, 2017 at 08:47:35PM CET, leon@...nel.org wrote:
> >On Fri, Nov 10, 2017 at 08:10:43AM +0100, Ivan Vecera wrote:
> >> On 10.11.2017 07:57, Leon Romanovsky wrote:
> >> > On Fri, Nov 10, 2017 at 07:20:14AM +0100, Ivan Vecera wrote:
> >> >> The patch adds support to batch devlink commands.
> >> >>
> >> >> Cc: Jiri Pirko <jiri@...lanox.com>
> >> >> Cc: Arkadi Sharshevsky <arkadis@...lanox.com>
> >> >> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
> >> >> ---
> >> >>  devlink/devlink.c  | 70 +++++++++++++++++++++++++++++++++++++++++++++++-------
> >> >>  man/man8/devlink.8 | 16 +++++++++++++
> >> >>  2 files changed, 78 insertions(+), 8 deletions(-)
> >> >>
> >> >
> >> > <..>
> >> >
> >> >> diff --git a/man/man8/devlink.8 b/man/man8/devlink.8
> >> >> index a480766c..a975ef34 100644
> >> >> --- a/man/man8/devlink.8
> >> >> +++ b/man/man8/devlink.8
> >> >> @@ -12,6 +12,12 @@ devlink \- Devlink tool
> >> >>  .sp
> >> >>
> >> >>  .ti -8
> >> >> +.B devlink
> >> >> +.RB "[ " -force " ] "
> >> >> +.BI "-batch " filename
> >> >> +.sp
> >> >> +
> >> >> +.ti -8
> >> >>  .IR OBJECT " := { "
> >> >>  .BR dev " | " port " | " monitor " }"
> >> >>  .sp
> >> >> @@ -32,6 +38,16 @@ Print the version of the
> >> >>  utility and exit.
> >> >>
> >> >>  .TP
> >> >> +.BR "\-b", " \-batch " <FILENAME>
> >> >> +Read commands from provided file or standard input and invoke them.
> >> >> +First failure will cause termination of devlink.
> >> >
> >> > It is worth to document the expected format of that file.
> >> > And IMHO, it is better to have ability to load JSON fie which was
> >> > generated by -j, instead of declaring new format/knob.
> >> It's just a list of command-lines... like other utils (bridge,ip...)
> >
> >I'm implementing similar thing in RDMAtool (part of iproute2) and choose JSON
> >approach, it is more user and script friendly.
>
> Leon, we should really do things in a way they are currently done and
> used. Batching is implemented in "ip" for a long time. It makes perfect
> sense to have one command line per line of the batch file.
>
> In contrary, json output sounds really odd in this case. With json,
> there is no relation to ordinary ip command line params. Or do you want
> to extend it to accept json as well?

Yes, I wanted to add new field - "cmd", and whole logic to parse JSON to
properly rebuild command from that with right parameters and device name.

However, most probably, I'll never finish it near future, so in meanwhile I will
provide the same batch format as Ivan proposed.

Thanks

>

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