diff may skip comparing content of files with identical st_ino/st_dev.
Overlayfs stat(2) may return same st_dev/st_ino for hardlink copy ups,
but it does not mean that read(2) will return the same content.
Convert the test to output hardlink files content to golden output
instead of using diff.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>
# Create 2 hardlinked files in lower
lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
mkdir -p $lowerdir
# Create 2 hardlinked files in lower
lowerdir=$OVL_BASE_SCRATCH_MNT/$OVL_LOWER
mkdir -p $lowerdir
-echo "patient zero" >> $lowerdir/foo
+echo "zero" >> $lowerdir/foo
ln $lowerdir/foo $lowerdir/bar
ln $lowerdir/foo $lowerdir/bar
+echo "== Before copy up =="
+cat $FILES
record_ino_nlink $tmp.before
# Modify content of one of the hardlinks
record_ino_nlink $tmp.before
# Modify content of one of the hardlinks
+echo "== After write one =="
+cat $FILES
check_ino_nlink $tmp.before $tmp.after
check_ino_nlink $tmp.before $tmp.after
-# Compare content of files - expect silence
-diff $foo $bar
-
-echo "Silence is golden"
+== Before copy up ==
+zero
+zero
+== After write one ==
+zero
+one
+zero
+one