Add Heal Disk Metadata RPC API + tests (#2556)

cmd/controller-handlers.go

@@ -103,6 +103,18 @@ func (c *controllerAPIHandlers) HealObjectHandler(args *HealObjectArgs, reply *G
 	return objAPI.HealObject(args.Bucket, args.Object)
 }
 
+// HealObject - heal the object.
+func (c *controllerAPIHandlers) HealDiskMetadataHandler(args *GenericArgs, reply *GenericReply) error {
+	objAPI := c.ObjectAPI()
+	if objAPI == nil {
+		return errVolumeBusy
+	}
+	if !isRPCTokenValid(args.Token) {
+		return errInvalidToken
+	}
+	return objAPI.HealDiskMetadata()
+}
+
 // ShutdownArgs - argument for Shutdown RPC.
 type ShutdownArgs struct {
 	// Authentication token generated by Login.