tests: fincore/count, skip unsupported FS

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>

tests/ts/fincore/count

@@ -31,6 +31,21 @@ function _dd
 	return $ret
 }
 
+function check_dd_fs_feat
+{
+	local testf="$TS_OUTDIR/ddtest"
+	rm -f "$testf"
+	touch "$testf"
+
+	# NFS seems to fail for direct AND append
+	_dd if=/dev/zero of="$testf" bs=1K count=2 oflag=direct,append &>/dev/null \
+		|| ts_skip "unsupported: dd oflag=direct,append"
+
+	# TODO: Should we check for sparse file support?
+
+	rm -f "$testf"
+}
+
 function run_dd_test
 {
     header=$1
@@ -94,6 +109,8 @@ fi
 ts_check_test_command "$TS_CMD_FINCORE"
 ts_cd "$TS_OUTDIR"
 
+check_dd_fs_feat
+
 INPUT=
 input=