On Mon, Feb 4, 2019 at 8:34 PM Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > > Overlayfs might copy up data of file on first write of file (and > not necessarily upon open of file). So call falloc file opened > with O_RDWR and after that data must have been copied up. > > Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx> Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx> > --- > tests/overlay/060 | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > Index: xfstests-dev/tests/overlay/060 > =================================================================== > --- xfstests-dev.orig/tests/overlay/060 2018-08-27 11:21:51.811847671 -0400 > +++ xfstests-dev/tests/overlay/060 2019-02-04 11:28:09.023718690 -0500 > @@ -170,7 +170,7 @@ test_common() > > # Trigger data copy up and check absence of metacopy xattr. > mount_overlay $_lowerdir > - $XFS_IO_PROG -c "open -a $SCRATCH_MNT/$_target" > + $XFS_IO_PROG -c "falloc 0 1" $SCRATCH_MNT/$_target >> $seqres.full > echo "check properties of data copied up file" > check_file_size_contents $SCRATCH_MNT/$_target $_size "$_data" > umount_overlay
