netdev-offload-tc: Reject rules with unsupported ct_state flags.

TC flower doesn't support some ct state flags such as
INVALID/SNAT/DNAT/REPLY. So it is better to reject this rule.

Fixes: 576126a ("netdev-offload-tc: Add conntrack support")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Reviewed-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

lib/netdev-offload-tc.c

@@ -1580,28 +1580,29 @@ netdev_tc_flow_put(struct netdev *netdev, struct match *match,
                 flower.key.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_NEW;
             }
             flower.mask.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_NEW;
+            mask->ct_state &= ~OVS_CS_F_NEW;
         }
 
         if (mask->ct_state & OVS_CS_F_ESTABLISHED) {
             if (key->ct_state & OVS_CS_F_ESTABLISHED) {
                 flower.key.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED;
             }
             flower.mask.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED;
+            mask->ct_state &= ~OVS_CS_F_ESTABLISHED;
         }
 
         if (mask->ct_state & OVS_CS_F_TRACKED) {
             if (key->ct_state & OVS_CS_F_TRACKED) {
                 flower.key.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_TRACKED;
             }
             flower.mask.ct_state |= TCA_FLOWER_KEY_CT_FLAGS_TRACKED;
+            mask->ct_state &= ~OVS_CS_F_TRACKED;
         }
 
         if (flower.key.ct_state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED) {
             flower.key.ct_state &= ~(TCA_FLOWER_KEY_CT_FLAGS_NEW);
             flower.mask.ct_state &= ~(TCA_FLOWER_KEY_CT_FLAGS_NEW);
         }
-
-        mask->ct_state = 0;
     }
 
     if (mask->ct_zone) {