netifd: Check interface state only when main device is set during interface_change_config

[project/netifd.git] / system-linux.c

diff --git a/system-linux.c b/system-linux.c
index 8f46705..b513948 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -1260,7 +1260,22 @@ static int system_rt(struct device *dev, struct device_route *route, int cmd)
        if (table >= 256)
                nla_put_u32(msg, RTA_TABLE, table);
 
+       if (route->flags & DEVROUTE_MTU) {
+               struct nlattr *metrics;
+
+               if (!(metrics = nla_nest_start(msg, RTA_METRICS)))
+                       goto nla_put_failure;
+
+               nla_put_u32(msg, RTAX_MTU, route->mtu);
+
+               nla_nest_end(msg, metrics);
+       }
+
        return system_rtnl_call(msg);
+
+nla_put_failure:
+       nlmsg_free(msg);
+       return -ENOMEM;
 }
 
 int system_add_route(struct device *dev, struct device_route *route)