--- a/mercurial/util.py	Thu Mar 23 22:13:02 2017 -0700
+++ b/mercurial/util.py	Thu Mar 23 22:31:50 2017 -0700
@@ -1061,10 +1061,13 @@
     'ext2',
     'ext3',
     'ext4',
+    'hfs',
     'jfs',
     'reiserfs',
     'tmpfs',
+    'ufs',
     'xfs',
+    'zfs',
 ])
 
 def copyfile(src, dest, hardlink=False, copystat=False, checkambig=False):