detect interface configuration changes

diff --git a/interface.c b/interface.c
index eb2f754420f28f90c9b8c742279741e33b80ba61..b8b3fd13fa983ba69d893b026c6b2a54c93ac82f 100644 (file)
--- a/interface.c
+++ b/interface.c
@@ -400,6 +400,8 @@ static void
 interface_change_config(struct interface *if_old, struct interface *if_new)
 {
        struct blob_attr *old_config = if_old->config;
+       const char *old_ifname = if_old->ifname;
+       const struct proto_handler *proto = if_old->proto_handler;
 
        interface_clear_errors(if_old);
        if_old->config = if_new->config;
@@ -408,8 +410,30 @@ interface_change_config(struct interface *if_old, struct interface *if_new)
 
        if_old->config_autostart = if_new->config_autostart;
        if_old->ifname = if_new->ifname;
+       if_old->proto_handler = if_new->proto_handler;
 
+       if (strcmp(old_ifname, if_new->ifname) != 0 ||
+               proto != if_new->proto_handler) {
+               D(INTERFACE, "Reload interface '%s' because of ifname/proto change\n",
+                 if_old->name);
+               goto reload;
+       }
+
+       if (!proto->config_params)
+               D(INTERFACE, "No config parameters for interface '%s'\n",
+                 if_old->name);
+       else if (!config_check_equal(old_config, if_new->config,
+                               proto->config_params)) {
+               D(INTERFACE, "Reload interface '%s because of config changes\n",
+                 if_old->name);
+               goto reload;
+       }
+
+       goto out;
+
+reload:
        set_config_state(if_old, IFC_RELOAD);
+out:
        free(old_config);
        free(if_new);
 }