Re: [RFC][PATCH 0/9] VFS: Introduce mount context

From: Jeff Layton <jlayton@poochiereds.net>
To: David Howells <dhowells@redhat.com>
Cc: viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org,
	linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org,
	mszeredi@redhat.com
Subject: Re: [RFC][PATCH 0/9] VFS: Introduce mount context
Date: Wed, 03 May 2017 13:27:19 -0400	[thread overview]
Message-ID: <1493832439.3180.1.camel@poochiereds.net> (raw)
In-Reply-To: <31716.1493830216@warthog.procyon.org.uk>

On Wed, 2017-05-03 at 17:50 +0100, David Howells wrote:
> Jeff Layton <jlayton@poochiereds.net> wrote:
> 
> > >  (*) Move the walk-from-root stuff that nfs has to generic code so that you
> > >      can do something akin to:
> > > 
> > > 	mount /dev/sda1:/foo/bar /mnt
> > > 
> > >      See nfs_follow_remote_path() and mount_subtree().  This is slightly
> > >      tricky in NFS as we have to prevent referral loops.
> > > 
> > 
> > ':' is a legitimate character in a path component. How will you
> > distinguish that case?
> 
> Fair point.  Could instead do something like:
> 
> 	mount /dev/sda1 /mnt -o subroot=/foo/bar
> 
> or just limit it to the fsopen interface.
> 
> 

Yeah, something like that would certainly work. I like the basic idea
though of combining a mount and bind mount for local fs'.
-- 
Jeff Layton <jlayton@poochiereds.net>