state: convert acl-roles.policies index to new pattern

agent/consul/state/acl.go

@@ -113,57 +113,6 @@ func (s *TokenRolesIndex) PrefixFromArgs(args ...interface{}) ([]byte, error) {
 	return val, nil
 }
 
-type RolePoliciesIndex struct {
-}
-
-func (s *RolePoliciesIndex) FromObject(obj interface{}) (bool, [][]byte, error) {
-	role, ok := obj.(*structs.ACLRole)
-	if !ok {
-		return false, nil, fmt.Errorf("object is not an ACLRole")
-	}
-
-	links := role.Policies
-
-	numLinks := len(links)
-	if numLinks == 0 {
-		return false, nil, nil
-	}
-
-	vals := make([][]byte, 0, numLinks)
-	for _, link := range links {
-		vals = append(vals, []byte(link.ID+"\x00"))
-	}
-
-	return true, vals, nil
-}
-
-func (s *RolePoliciesIndex) FromArgs(args ...interface{}) ([]byte, error) {
-	if len(args) != 1 {
-		return nil, fmt.Errorf("must provide only a single argument")
-	}
-	arg, ok := args[0].(string)
-	if !ok {
-		return nil, fmt.Errorf("argument must be a string: %#v", args[0])
-	}
-	// Add the null character as a terminator
-	arg += "\x00"
-	return []byte(arg), nil
-}
-
-func (s *RolePoliciesIndex) PrefixFromArgs(args ...interface{}) ([]byte, error) {
-	val, err := s.FromArgs(args...)
-	if err != nil {
-		return nil, err
-	}
-
-	// Strip the null terminator, the rest is a prefix
-	n := len(val)
-	if n > 0 {
-		return val[:n-1], nil
-	}
-	return val, nil
-}
-
 type TokenExpirationIndex struct {
 	LocalFilter bool
 }
@@ -544,22 +493,21 @@ func fixupTokenRoleLinks(tx ReadTxn, original *structs.ACLToken) (*structs.ACLTo
 
 func resolveRolePolicyLinks(tx *txn, role *structs.ACLRole, allowMissing bool) error {
 	for linkIndex, link := range role.Policies {
-		if link.ID != "" {
-			policy, err := getPolicyWithTxn(tx, nil, link.ID, aclPolicyGetByID, &role.EnterpriseMeta)
-
-			if err != nil {
-				return err
-			}
-
-			if policy != nil {
-				// the name doesn't matter here
-				role.Policies[linkIndex].Name = policy.Name
-			} else if !allowMissing {
-				return fmt.Errorf("No such policy with ID: %s", link.ID)
-			}
-		} else {
+		if link.ID == "" {
 			return fmt.Errorf("Encountered a Role with policies linked by Name in the state store")
 		}
+
+		policy, err := getPolicyWithTxn(tx, nil, link.ID, aclPolicyGetByID, &role.EnterpriseMeta)
+		if err != nil {
+			return err
+		}
+
+		if policy != nil {
+			// the name doesn't matter here
+			role.Policies[linkIndex].Name = policy.Name
+		} else if !allowMissing {
+			return fmt.Errorf("No such policy with ID: %s", link.ID)
+		}
 	}
 	return nil
 }
@@ -1495,8 +1443,14 @@ func (s *Store) ACLRoleList(ws memdb.WatchSet, policy string, entMeta *structs.E
 	var iter memdb.ResultIterator
 	var err error
 
+	// TODO: accept non-pointer value
+	if entMeta == nil {
+		entMeta = structs.DefaultEnterpriseMeta()
+	}
+
 	if policy != "" {
-		iter, err = aclRoleListByPolicy(tx, policy, entMeta)
+		q := Query{Value: policy, EnterpriseMeta: *entMeta}
+		iter, err = tx.Get(tableACLRoles, indexPolicies, q)
 	} else {
 		iter, err = tx.Get(tableACLRoles, indexName+"_prefix", entMeta)
 	}

agent/consul/state/acl_events.go

@@ -36,7 +36,8 @@ func aclChangeUnsubscribeEvent(tx ReadTxn, changes Changes) ([]stream.Event, err
 			}
 			secretIDs = appendSecretIDsFromTokenIterator(secretIDs, tokens)
 
-			roles, err := aclRoleListByPolicy(tx, policy.ID, &policy.EnterpriseMeta)
+			q := Query{Value: policy.ID, EnterpriseMeta: policy.EnterpriseMeta}
+			roles, err := tx.Get(tableACLRoles, indexPolicies, q)
 			if err != nil {
 				return nil, err
 			}

agent/consul/state/acl_oss.go

@@ -53,6 +53,25 @@ func indexNameFromACLRole(raw interface{}) ([]byte, error) {
 	return b.Bytes(), nil
 }
 
+func multiIndexPolicyFromACLRole(raw interface{}) ([][]byte, error) {
+	role, ok := raw.(*structs.ACLRole)
+	if !ok {
+		return nil, fmt.Errorf("unexpected type %T for structs.ACLRole index", raw)
+	}
+
+	count := len(role.Policies)
+	if count == 0 {
+		return nil, errMissingValueForIndex
+	}
+
+	vals := make([][]byte, 0, count)
+	for _, link := range role.Policies {
+		vals = append(vals, []byte(strings.ToLower(link.ID)+"\x00"))
+	}
+
+	return vals, nil
+}
+
 func aclPolicyGetByID(tx ReadTxn, id string, _ *structs.EnterpriseMeta) (<-chan struct{}, interface{}, error) {
 	return tx.FirstWatch(tableACLPolicies, indexID, id)
 }
@@ -174,10 +193,6 @@ func aclRoleGetByID(tx ReadTxn, id string, _ *structs.EnterpriseMeta) (<-chan st
 	return tx.FirstWatch(tableACLRoles, indexID, id)
 }
 
-func aclRoleListByPolicy(tx ReadTxn, policy string, _ *structs.EnterpriseMeta) (memdb.ResultIterator, error) {
-	return tx.Get(tableACLRoles, indexPolicies, policy)
-}
-
 func aclRoleDeleteWithRole(tx *txn, role *structs.ACLRole, idx uint64) error {
 	// remove the role
 	if err := tx.Delete(tableACLRoles, role); err != nil {

agent/consul/state/acl_oss_test.go

@@ -66,14 +66,14 @@ func testIndexerTableACLRoles() map[string]indexerTestCase {
 		},
 		indexPolicies: {
 			read: indexValue{
-				source:   "PolicyId1",
-				expected: []byte("PolicyId1\x00"),
+				source:   Query{Value: "PolicyId1"},
+				expected: []byte("policyid1\x00"),
 			},
 			writeMulti: indexValueMulti{
 				source: obj,
 				expected: [][]byte{
-					[]byte("PolicyId1\x00"),
-					[]byte("PolicyId2\x00"),
+					[]byte("policyid1\x00"),
+					[]byte("policyid2\x00"),
 				},
 			},
 		},

agent/consul/state/acl_schema.go

@@ -162,7 +162,10 @@ func rolesTableSchema() *memdb.TableSchema {
 				// Need to allow missing for the anonymous token
 				AllowMissing: true,
 				Unique:       false,
-				Indexer:      &RolePoliciesIndex{},
+				Indexer: indexerMulti{
+					readIndex:       readIndex(indexFromQuery),
+					writeIndexMulti: writeIndexMulti(multiIndexPolicyFromACLRole),
+				},
 			},
 		},
 	}

agent/consul/state/testdata/TestStateStoreSchema.golden

@@ -20,7 +20,7 @@ table=acl-roles
   index=name unique
     indexer=github.com/hashicorp/consul/agent/consul/state.indexerSingleWithPrefix readIndex=github.com/hashicorp/consul/agent/consul/state.indexFromQuery writeIndex=github.com/hashicorp/consul/agent/consul/state.indexNameFromACLRole prefixIndex=github.com/hashicorp/consul/agent/consul/state.prefixIndexFromQuery
   index=policies allow-missing
-    indexer=github.com/hashicorp/consul/agent/consul/state.RolePoliciesIndex
+    indexer=github.com/hashicorp/consul/agent/consul/state.indexerMulti readIndex=github.com/hashicorp/consul/agent/consul/state.indexFromQuery writeIndexMulti=github.com/hashicorp/consul/agent/consul/state.multiIndexPolicyFromACLRole
 
 table=acl-tokens
   index=accessor unique allow-missing