allow dynamically changing max_object_versions per object (#19265)

cmd/handler-api.go

@@ -55,6 +55,7 @@ type apiConfig struct {
 	gzipObjects                 bool
 	rootAccess                  bool
 	syncEvents                  bool
+	objectMaxVersions           int
 }
 
 const (
@@ -186,6 +187,7 @@ func (t *apiConfig) init(cfg api.Config, setDriveCounts []int) {
 	t.gzipObjects = cfg.GzipObjects
 	t.rootAccess = cfg.RootAccess
 	t.syncEvents = cfg.SyncEvents
+	t.objectMaxVersions = cfg.ObjectMaxVersions
 }
 
 func (t *apiConfig) odirectEnabled() bool {
@@ -386,3 +388,15 @@ func (t *apiConfig) isSyncEventsEnabled() bool {
 
 	return t.syncEvents
 }
+
+func (t *apiConfig) getObjectMaxVersions() int {
+	t.mu.RLock()
+	defer t.mu.RUnlock()
+
+	if t.objectMaxVersions <= 0 {
+		// defaults to 'maxObjectVersions' when unset.
+		return maxObjectVersions
+	}
+
+	return t.objectMaxVersions
+}