2 files changed, 48 insertions, 0 deletions
diff --git a/pkg/subsystem/list.go b/pkg/subsystem/list.go
index 7842f8620..d512a3fe1 100644
--- a/pkg/subsystem/list.go
+++ b/pkg/subsystem/list.go
@@ -26,3 +26,7 @@ func RegisterList(name string, list []*Subsystem) {
 func GetList(name string) []*Subsystem {
 	return lists[name]
 }
+
+func ListService(name string) *Service {
+	return MustMakeService(lists[name])
+}
diff --git a/pkg/subsystem/service.go b/pkg/subsystem/service.go
new file mode 100644
index 000000000..e3dabcfce
--- /dev/null
+++ b/pkg/subsystem/service.go
@@ -0,0 +1,44 @@
+// Copyright 2023 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package subsystem
+
+import (
+	"fmt"
+)
+
+type Service struct {
+	*Extractor
+	perName map[string]*Subsystem
+}
+
+func MustMakeService(list []*Subsystem) *Service {
+	service, err := MakeService(list)
+	if err != nil {
+		panic(fmt.Sprintf("service creation failed: %s", err))
+	}
+	return service
+}
+
+func MakeService(list []*Subsystem) (*Service, error) {
+	extractor := MakeExtractor(list)
+	perName := map[string]*Subsystem{}
+	for _, item := range list {
+		if item.Name == "" {
+			return nil, fmt.Errorf("input contains a subsystem without a name")
+		}
+		if perName[item.Name] != nil {
+			return nil, fmt.Errorf("collision on %#v name", item.Name)
+		}
+		perName[item.Name] = item
+	}
+
+	return &Service{
+		Extractor: extractor,
+		perName:   perName,
+	}, nil
+}
+
+func (s *Service) ByName(name string) *Subsystem {
+	return s.perName[name]
+}