netdev - Re: [PATCH iproute2 1/2] netns: switch netns in the child when executing commands

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Date:   Tue, 11 Jun 2019 00:52:13 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev <netdev@...r.kernel.org>, David Ahern <dsahern@...nel.org>
Subject: Re: [PATCH iproute2 1/2] netns: switch netns in the child when
 executing commands

On Tue, Jun 11, 2019 at 12:46 AM Stephen Hemminger
<stephen@...workplumber.org> wrote:
>
> On Tue, 11 Jun 2019 00:16:12 +0200
> Matteo Croce <mcroce@...hat.com> wrote:
>
> > +     printf("\nnetns: %s\n", nsname);
> > +     cmd_exec(argv[0], argv, true, nsname);
> >       return 0;
>
> simple printf breaks JSON output.

It was just moved from on_netns_label(). I will check how the json
output works when running doall and provide a similar behaviour.

Anyway, I noticed that the VRF env should be reset but only in the
child. I'm adding a function pointer to cmd_exec which will
point to an hook which changes the netns when doing 'ip netns exec'
and reset the VRF on vrf exec.

Regards,
-- 
Matteo Croce
per aspera ad upstream