From: Miklos Szeredi <mszeredi@suse.cz>
Date: Fri, 12 Dec 2014 23:59:46 +0000 (+0100)
Subject: ovl: allow statfs if no upper layer
X-Git-Tag: v4.0-rc1~2^2~17^2~12
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4ebc581828d5d0fe189ca06cef8b7a63cb4583d5;p=karo-tx-linux.git

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 110c968dcb3b..cc7a0f3aa0dd 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -484,7 +484,7 @@ static void ovl_put_super(struct super_block *sb)
  * @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 @@ static int ovl_statfs(struct dentry *dentry, struct kstatfs *buf)
 	struct path path;
 	int err;
 
-	ovl_path_upper(root_dentry, &path);
+	ovl_path_real(root_dentry, &path);
 
 	err = vfs_statfs(&path, buf);
 	if (!err) {