netdev - Re: [RFC iproute2] netns: add mounting state file for each netns

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Message-ID: <CAGnkfhz92SA7_kbARMzTqj3sTE3pgE=FEOXzFQxX6m=cemJUkg@mail.gmail.com>
Date:   Mon, 1 Jul 2019 15:50:34 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc:     netdev <netdev@...r.kernel.org>,
        Alexander Aring <aring@...atatu.com>
Subject: Re: [RFC iproute2] netns: add mounting state file for each netns

On Mon, Jul 1, 2019 at 2:38 PM Nicolas Dichtel
<nicolas.dichtel@...nd.com> wrote:
>
> Le 30/06/2019 à 21:29, Matteo Croce a écrit :
> > When ip creates a netns, there is a small time interval between the
> > placeholder file creation in NETNS_RUN_DIR and the bind mount from /proc.
> >
> > Add a temporary file named .mounting-$netns which gets deleted after the
> > bind mount, so watching for delete event matching the .mounting-* name
> > will notify watchers only after the bind mount has been done.
> Probably a naive question, but why creating those '.mounting-$netns' files in
> the directory where netns are stored? Why not another directory, something like
> /var/run/netns-monitor/?
>
>
> Regards,
> Nicolas

Yes, would work too. But ideally I'd wait for the mount inotify notifications.

-- 
Matteo Croce
per aspera ad upstream