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out of date Ubuntu chroot and upgrade it to the latest and greatest;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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