ovs: make MatchFlow --strict aware

Author: yousong

ovs/flow.go

@@ -437,6 +437,14 @@ func (f *Flow) MatchFlow() *MatchFlow {
 	}
 }
 
+// MatchFlowStrict converts Flow into a strict-matching-aware MatchFlow
+func (f *Flow) MatchFlowStrict() *MatchFlow {
+	mf := f.MatchFlow()
+	mf.Priority = f.Priority
+	mf.Strict = true
+	return mf
+}
+
 // marshalActions marshals all provided Actions to their text form.
 func marshalActions(aa []Action) ([]string, error) {
 	fns := make([]func() ([]byte, error), 0, len(aa))

ovs/flow_test.go

@@ -1203,6 +1203,18 @@ func TestFlowMatchFlow(t *testing.T) {
 			}
 		})
 	}
+	for _, tt := range tests {
+		t.Run(tt.desc, func(t *testing.T) {
+			want, got := tt.m, tt.f.MatchFlowStrict()
+			wantStrict := &(*want)
+			wantStrict.Strict = true
+			wantStrict.Priority = tt.f.Priority
+			if !reflect.DeepEqual(wantStrict, got) {
+				t.Fatalf("unexpected MatchFlowStrict:\n- want: %#v\n-  got: %#v",
+					wantStrict, got)
+			}
+		})
+	}
 }
 
 // flowsEqual determines if two possible Flows are equal.

ovs/matchflow.go

@@ -37,8 +37,10 @@ var (
 // A MatchFlow is an OpenFlow flow intended for flow deletion.  It can be marshaled to its textual
 // form for use with Open vSwitch.
 type MatchFlow struct {
-	Protocol Protocol
+	Strict   bool
 	InPort   int
+	Priority int
+	Protocol Protocol
 	Matches  []Match
 	Table    int
 
@@ -83,6 +85,11 @@ func (f *MatchFlow) MarshalText() ([]byte, error) {
 
 	var b []byte
 
+	if f.Strict {
+		b = append(b, priority+"="...)
+		b = strconv.AppendInt(b, int64(f.Priority), 10)
+		b = append(b, ',')
+	}
 	if f.Protocol != "" {
 		b = append(b, f.Protocol...)
 		b = append(b, ',')