linux-kernel - [PATCH 0/2] overlayfs: module and statfs fixes

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Message-Id: <1285955282-10240-1-git-send-email-apw@canonical.com>
Date:	Fri,  1 Oct 2010 18:48:00 +0100
From:	Andy Whitcroft <apw@...onical.com>
To:	Miklos Szeredi <miklos@...redi.hu>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	vaurora@...hat.com, neilb@...e.de, viro@...iv.linux.org.uk,
	Andy Whitcroft <apw@...onical.com>
Subject: [PATCH 0/2] overlayfs: module and statfs fixes

Just been playing with overlayfs and hit a couple of issues.  First I
was not able to build this filesystem as a module.  Second statfs support
was missing.  Following this email are a couple of patches which I used to
fix these up.  I am not 100% sure the statfs approach is quite right, but
its not clear the semantics can ever be correct in the face of an overlay.

With these applied I was able to drop an overlay over the top of a very
out of date Ubuntu chroot and upgrade it to the latest and greatest;
all without incident.

Nice.

-apw

Andy Whitcroft (2):
  overlayfs: export security_inode_permission to allow overlayfs to be
    modular
  overlayfs: add statfs support

 fs/overlayfs/overlayfs.c |   20 ++++++++++++++++++++
 security/security.c      |    1 +
 2 files changed, 21 insertions(+), 0 deletions(-)

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