generic/699 fails because _overlay_mount_dirs() uses _common_dev_mount_options(), and when FSTYP is ext4, that yields "-o acl,user_xattr" and acl is not a valid option for overlayfs. Lots of overlayfs/ tests use _overlay_mount_dirs of course, but they run with ./check -overlay which sets FSTYP to overlay, not the underlying type. I'm ... not sure how this should be fixed. I have a hack to temporarily override FSTYP for the test, but that seems bad. Thoughts? Thanks, -Eric
