fix: mountPermission settting issue due to case insensitive parameter

Author: andyzhangx

pkg/blob/blob.go

@@ -994,6 +994,20 @@ func setKeyValueInMap(m map[string]string, key, value string) {
 	m[key] = value
 }
 
+// getValueInMap get value from map by key
+// key in the map is case insensitive
+func getValueInMap(m map[string]string, key string) string {
+	if m == nil {
+		return ""
+	}
+	for k, v := range m {
+		if strings.EqualFold(k, key) {
+			return v
+		}
+	}
+	return ""
+}
+
 // replaceWithMap replace key with value for str
 func replaceWithMap(str string, m map[string]string) string {
 	for k, v := range m {

pkg/blob/blob_test.go

@@ -1578,6 +1578,52 @@ func TestSetKeyValueInMap(t *testing.T) {
 	}
 }
 
+func TestGetValueInMap(t *testing.T) {
+	tests := []struct {
+		desc     string
+		m        map[string]string
+		key      string
+		expected string
+	}{
+		{
+			desc:     "nil map",
+			key:      "key",
+			expected: "",
+		},
+		{
+			desc:     "empty map",
+			m:        map[string]string{},
+			key:      "key",
+			expected: "",
+		},
+		{
+			desc:     "non-empty map",
+			m:        map[string]string{"k": "v"},
+			key:      "key",
+			expected: "",
+		},
+		{
+			desc:     "same key already exists",
+			m:        map[string]string{"subDir": "value2"},
+			key:      "subDir",
+			expected: "value2",
+		},
+		{
+			desc:     "case insensitive key already exists",
+			m:        map[string]string{"subDir": "value2"},
+			key:      "subdir",
+			expected: "value2",
+		},
+	}
+
+	for _, test := range tests {
+		result := getValueInMap(test.m, test.key)
+		if result != test.expected {
+			t.Errorf("test[%s]: unexpected output: %v, expected result: %v", test.desc, result, test.expected)
+		}
+	}
+}
+
 func TestReplaceWithMap(t *testing.T) {
 	tests := []struct {
 		desc     string

pkg/blob/nodeserver.go

@@ -98,7 +98,7 @@ func (d *Driver) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolu
 			return &csi.NodePublishVolumeResponse{}, err
 		}
 
-		if perm := context[mountPermissionsField]; perm != "" {
+		if perm := getValueInMap(context, mountPermissionsField); perm != "" {
 			var err error
 			if mountPermissions, err = strconv.ParseUint(perm, 8, 32); err != nil {
 				return nil, status.Errorf(codes.InvalidArgument, fmt.Sprintf("invalid mountPermissions %s", perm))