overlay/060: Use falloc to make sure a meta copy file got copied up

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.

[Eryu: add _require_xfs_io_command "falloc" to make sure underlying
fs have fallocate(2) support]

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

diff --git a/tests/overlay/060 b/tests/overlay/060
index 2e0764e9450f96024945c3208184f87496154c8f..77ff01486386c3c047c39bcdd7a6872bb1081a97 100755 (executable)
--- a/tests/overlay/060
+++ b/tests/overlay/060
@@ -36,6 +36,7 @@ _supported_os Linux
 # them explicity after test.
 _require_scratch_nocheck
 _require_scratch_overlay_features index redirect_dir metacopy
+_require_xfs_io_command "falloc"
 
 # remove all files from previous tests
 _scratch_mkfs
@@ -170,7 +171,7 @@ 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