Unionfs: force only one open lower file after copyup in open(2)

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>

diff --git a/fs/unionfs/commonfops.c b/fs/unionfs/commonfops.c
index 7dfe0c7bc400f1af68802fe74b4c2243f56f2f43..5b2a6da6fe0ac7615bd469a8fcb1e047abb53d04 100644 (file)
--- a/fs/unionfs/commonfops.c
+++ b/fs/unionfs/commonfops.c
@@ -506,8 +506,11 @@ static int __open_file(struct inode *inode, struct file *file,
                        for (bindex = bstart - 1; bindex >= 0; bindex--) {
                                err = copyup_file(parent->d_inode, file,
                                                  bstart, bindex, size);
-                               if (!err)
+                               if (!err) {
+                                       /* only one regular file open */
+                                       fbend(file) = fbstart(file);
                                        break;
+                               }
                        }
                        return err;
                } else {