commit 02bcd1577400b0b2eab806ccb9f72d6b5ec7bcca
author Amir Goldstein <amir73il@gmail.com> Wed Jun 21 15:28:36 2017 +0300
committer Miklos Szeredi <mszeredi@redhat.com> Tue Jul 04 22:03:17 2017 +0200
tree 92c54e46aa6ae552eefac194f25d7faccdd00d5c
parent 6b8aa129dcbe0e9825109b35c4b967f984e8fb13

ovl: introduce the inodes index dir feature

Create the index dir on mount. The index dir will contain hardlinks to
upper inodes, named after the hex representation of their origin lower
inodes.

The index dir is going to be used to prevent breaking lower hardlinks
on copy up and to implement overlayfs NFS export.

Because the feature is not fully backward compat, enabling the feature
is opt-in by config/module/mount option.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>