[PATCH v15 18/30] ovl: Do not expose metacopy only dentry from d_real()

[Vivek Goyal <vgoyal@redhat.com>]

Metacopy dentry/inode is internal to overlay and is never exposed
outside of it. Modify d_real() to look for only dentries/inode which
have data and which are not metacopy.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
 fs/overlayfs/super.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index ce90b6e3ce76..c97b5abda954 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -101,10 +101,11 @@ static struct dentry *ovl_d_real(struct dentry *dentry,
 	}
 
 	real = ovl_dentry_upper(dentry);
-	if (real && (!inode || inode == d_inode(real)))
+	if (real && ovl_has_upperdata(d_inode(dentry)) &&
+	    (!inode || inode == d_inode(real)))
 		return real;
 
-	real = ovl_dentry_lower(dentry);
+	real = ovl_dentry_lowerdata(dentry);
 	if (!real)
 		goto bug;
 
-- 
2.13.6