linux-kernel - Re: [patch] VFS: extend /proc/mounts

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Date:	Thu, 17 Jan 2008 11:34:38 +0100
From:	Karel Zak <kzak@...hat.com>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	viro@...IV.linux.org.uk, akpm@...ux-foundation.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	util-linux-ng@...r.kernel.org, linuxram@...ibm.com,
	viro@....linux.org.uk, hch@...radead.org, a.p.zijlstra@...llo.nl
Subject: Re: [patch] VFS: extend /proc/mounts

On Thu, Jan 17, 2008 at 09:36:11AM +0100, Miklos Szeredi wrote:
> > I'd suggest doing a new file that would *not* try to imitate /etc/mtab.
> > Another thing is, how much of propagation information do we want to
> > be exposed and what do we intend to do with it?
> 
> I think the scheme devised by Ram is basically right.  It shows the
> relationships (slave, peer) and the ID of a master/peer mount.

 Yes. It also shows the full relationship between source and
 destination for bind mounts. Now the /proc/mounts is useless:

  # mount --bind /mnt/test /mnt/test2

  # cat /proc/mounts | grep test
  /dev/root /mnt/test2 ext3 rw,noatime,data=ordered 0 0


> > What do we want to *do* with the information about propagation?
> 
> Just feedback about the state of the thing.  It's very annoying, that
> after setting up propagation, it's impossible to check the result.

 Exactly.

    Karel

-- 
 Karel Zak  <kzak@...hat.com>
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