ovl: allow statfs if no upper layer
Handle "no upper layer" case in statfs.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 110c968..cc7a0f3 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -484,7 +484,7 @@
* @buf: The struct kstatfs to fill in with stats
*
* Get the filesystem statistics. As writes always target the upper layer
- * filesystem pass the statfs to the same filesystem.
+ * filesystem pass the statfs to the upper filesystem (if it exists)
*/
static int ovl_statfs(struct dentry *dentry, struct kstatfs *buf)
{
@@ -493,7 +493,7 @@
struct path path;
int err;
- ovl_path_upper(root_dentry, &path);
+ ovl_path_real(root_dentry, &path);
err = vfs_statfs(&path, buf);
if (!err) {