• Andy Whitcroft's avatar
    overlayfs: add statfs support · cc259639
    Andy Whitcroft authored
    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: default avatarAndy Whitcroft <apw@canonical.com>
    Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
    cc259639
super.c 16.2 KB