add subjectaccessreview field and label selectors

Co-authored-by: Jordan Liggitt <liggitt@google.com>

Kubernetes-commit: 90f0b88b6a5855054460f45edc369f1edea0b97f

pkg/apis/meta/v1/types.go

@@ -1278,6 +1278,33 @@ const (
 	LabelSelectorOpDoesNotExist LabelSelectorOperator = "DoesNotExist"
 )
 
+// FieldSelectorRequirement is a selector that contains values, a key, and an operator that
+// relates the key and values.
+type FieldSelectorRequirement struct {
+	// key is the field selector key that the requirement applies to.
+	Key string `json:"key" protobuf:"bytes,1,opt,name=key"`
+	// operator represents a key's relationship to a set of values.
+	// Valid operators are In, NotIn, Exists, DoesNotExist.
+	// The list of operators may grow in the future.
+	Operator FieldSelectorOperator `json:"operator" protobuf:"bytes,2,opt,name=operator,casttype=FieldSelectorOperator"`
+	// values is an array of string values.
+	// If the operator is In or NotIn, the values array must be non-empty.
+	// If the operator is Exists or DoesNotExist, the values array must be empty.
+	// +optional
+	// +listType=atomic
+	Values []string `json:"values,omitempty" protobuf:"bytes,3,rep,name=values"`
+}
+
+// A field selector operator is the set of operators that can be used in a selector requirement.
+type FieldSelectorOperator string
+
+const (
+	FieldSelectorOpIn           FieldSelectorOperator = "In"
+	FieldSelectorOpNotIn        FieldSelectorOperator = "NotIn"
+	FieldSelectorOpExists       FieldSelectorOperator = "Exists"
+	FieldSelectorOpDoesNotExist FieldSelectorOperator = "DoesNotExist"
+)
+
 // ManagedFieldsEntry is a workflow-id, a FieldSet and the group version of the resource
 // that the fieldset applies to.
 type ManagedFieldsEntry struct {