generic: skip atime related tests on NFS

From nfs(5) we can know that atime related mount options have no
effect on NFS mounts, so add _require_atime() helper to skip atime
tests on NFS

Signed-off-by: Eryu Guan <eguan@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

common/rc

@@ -2389,6 +2389,13 @@ _verify_reflink()
                || echo "$1 and $2 are not reflinks: different extents"
 }
 
+_require_atime()
+{
+	if [ "$FSTYP" == "nfs" ]; then
+		_notrun "atime related mount options have no effect on NFS"
+	fi
+}
+
 _require_relatime()
 {
         _scratch_mkfs > /dev/null 2>&1

tests/generic/003

@@ -47,6 +47,7 @@ _cleanup()
 _supported_fs generic
 _supported_os Linux
 _require_scratch
+_require_atime
 _require_relatime
 
 rm -f $seqres.full

tests/generic/192

@@ -54,6 +54,7 @@ is_noatime_set() {
 _supported_fs generic
 _supported_os Linux
 _require_test
+_require_atime
 #delay=150
 #delay=75
 #delay=60