tree 5cce84e37ebeb3c0a73395af34081e080d51f0fa
parent e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c
author Andy Whitcroft <apw@canonical.com> 1414102478 +0200
committer Miklos Szeredi <mszeredi@suse.cz> 1414102478 +0200

overlayfs: add statfs support

Add support for statfs to the overlayfs filesystem.  As the upper layer
is the target of all write operations assume that the space in that
filesystem is the space in the overlayfs.  There will be some inaccuracy as
overwriting a file will copy it up and consume space we were not expecting,
but it is better than nothing.

Use the upper layer dentry and mount from the overlayfs root inode,
passing the statfs call to that filesystem.

Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>