linux-kernel - Re: [PATCH 3/4] autofs - make mountpoint checks namespace aware

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Date:   Fri, 23 Sep 2016 20:00:42 +0800
From:   Ian Kent <raven@...maw.net>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        Mateusz Guzik <mguzik@...hat.com>, NeilBrown <neilb@...e.com>,
        autofs mailing list <autofs@...r.kernel.org>,
        Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Al Viro <viro@...IV.linux.org.uk>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Omar Sandoval <osandov@...ndov.com>
Subject: Re: [PATCH 3/4] autofs - make mountpoint checks namespace aware

On Fri, 2016-09-23 at 12:26 +0800, Ian Kent wrote:
> On Thu, 2016-09-22 at 20:37 -0500, Eric W. Biederman wrote:
> > Ian Kent <raven@...maw.net> writes:
> > 
> > > On Thu, 2016-09-22 at 10:43 -0500, Eric W. Biederman wrote:
> > > > Ian Kent <raven@...maw.net> writes:
> > > > 
> > > > > Eric, Mateusz, I appreciate your spending time on this and
> > > > > particularly
> > > > > pointing
> > > > > out my embarrassingly stupid is_local_mountpoint() usage mistake.
> > > > > 
> > > > > Please accept my apology for the inconvenience.
> > > > > 
> > > > > If all goes well (in testing) I'll have follow up patches to correct
> > > > > this
> > > > > fairly
> > > > > soon.
> > > > 
> > > > Related question.  Do you happen to know how many mounts per mount
> > > > namespace tend to be used?  It looks like it is going to be wise to put
> > > > a configurable limit on that number.  And I would like the default to be
> > > > something high enough most people don't care.  I believe autofs is
> > > > likely where people tend to use the most mounts.
> 
> Yes, I agree, I did want to try and avoid changing the parameters to
> ->d_mamange() but passing a struct path pointer might be better in the long
> run
> anyway.
> 

Andrew, could you please drop patches for this series.

I believe they are:
fs-make-is_local_mountpoint-usable-by-others.patch
fs-add-have_local_submounts.patch
autofs-make-mountpoint-checks-namespace-aware.patch
fs-remove-unused-have_submounts-function.patch

I'm going to have a go at what Eric and I discussed above rather than update
this series.

Ian