fix config routes enable/disable handling on down/up
[project/netifd.git] / interface.c
index 6e3feeb..3a40432 100644 (file)
@@ -18,6 +18,7 @@ enum {
        IFACE_ATTR_PROTO,
        IFACE_ATTR_AUTO,
        IFACE_ATTR_DEFAULTROUTE,
+       IFACE_ATTR_METRIC,
        IFACE_ATTR_MAX
 };
 
@@ -26,6 +27,7 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
        [IFACE_ATTR_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
        [IFACE_ATTR_AUTO] = { .name = "auto", .type = BLOBMSG_TYPE_BOOL },
        [IFACE_ATTR_DEFAULTROUTE] = { .name = "defaultroute", .type = BLOBMSG_TYPE_BOOL },
+       [IFACE_ATTR_METRIC] = { .name = "metric", .type = BLOBMSG_TYPE_INT32 },
 };
 
 const struct config_param_list interface_attr_list = {
@@ -79,6 +81,42 @@ void interface_add_error(struct interface *iface, const char *subsystem,
 }
 
 static void
+interface_data_del(struct interface *iface, struct interface_data *data)
+{
+       avl_delete(&iface->data, &data->node);
+       free(data);
+}
+
+static void
+interface_data_flush(struct interface *iface)
+{
+       struct interface_data *d, *tmp;
+
+       avl_for_each_element_safe(&iface->data, d, node, tmp)
+               interface_data_del(iface, d);
+}
+
+int
+interface_add_data(struct interface *iface, const struct blob_attr *data)
+{
+       struct interface_data *n, *o;
+
+       if (!blobmsg_check_attr(data, true))
+               return UBUS_STATUS_INVALID_ARGUMENT;
+
+       n = calloc(1, sizeof(*data) + blob_pad_len(data));
+       memcpy(n->data, data, blob_pad_len(data));
+       n->node.key = blobmsg_name(data);
+
+       o = avl_find_element(&iface->data, n->node.key, o, node);
+       if (o)
+               interface_data_del(iface, o);
+
+       avl_insert(&iface->data, &n->node);
+       return 0;
+}
+
+static void
 interface_event(struct interface *iface, enum interface_event ev)
 {
        struct interface_user *dep, *tmp;
@@ -92,11 +130,11 @@ interface_event(struct interface *iface, enum interface_event ev)
 static void
 interface_flush_state(struct interface *iface)
 {
-       interface_ip_flush(&iface->proto_ip);
        if (iface->main_dev.dev)
                device_release(&iface->main_dev);
-       if (iface->l3_dev != &iface->main_dev && iface->l3_dev->dev)
-               device_release(iface->l3_dev);
+       if (iface->l3_dev.dev)
+               device_release(&iface->l3_dev);
+       interface_data_flush(iface);
 }
 
 static void
@@ -104,6 +142,8 @@ mark_interface_down(struct interface *iface)
 {
        if (iface->state == IFS_UP)
                interface_event(iface, IFEV_DOWN);
+       interface_ip_set_enabled(&iface->config_ip, false);
+       interface_ip_flush(&iface->proto_ip);
        interface_flush_state(iface);
        iface->state = IFS_DOWN;
 }
@@ -187,7 +227,7 @@ interface_claim_device(struct interface *iface)
                !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
                dev = device_get(iface->ifname, true);
                if (dev)
-                       device_add_user(&iface->main_dev, dev);
+                       interface_set_main_dev(iface, dev);
        }
        if (iface->proto_handler->flags & PROTO_FLAG_INIT_AVAILABLE)
                interface_set_available(iface, true);
@@ -202,13 +242,13 @@ interface_cleanup(struct interface *iface, bool reload)
        list_for_each_entry_safe(dep, tmp, &iface->users, list)
                interface_remove_user(dep);
 
+       interface_dequeue_event(iface);
        interface_ip_flush(&iface->config_ip);
        interface_flush_state(iface);
        interface_clear_errors(iface);
        if (iface->main_dev.dev &&
            (!reload || !iface->main_dev.hotplug))
-               device_remove_user(&iface->main_dev);
-       iface->l3_dev = &iface->main_dev;
+               interface_set_main_dev(iface, NULL);
        interface_set_proto_state(iface, NULL);
 }
 
@@ -270,9 +310,8 @@ interface_proto_cb(struct interface_proto_state *state, enum interface_proto_eve
                        return;
 
                netifd_log_message(L_NOTICE, "Interface '%s' is now down\n", iface->name);
-               interface_ip_set_enabled(&iface->config_ip, false);
-               system_flush_routes();
                mark_interface_down(iface);
+               system_flush_routes();
                interface_handle_config_change(iface);
                break;
        case IFPEV_LINK_LOST:
@@ -282,6 +321,8 @@ interface_proto_cb(struct interface_proto_state *state, enum interface_proto_eve
                netifd_log_message(L_NOTICE, "Interface '%s' has lost the connection\n", iface->name);
                if (iface->state == IFS_UP)
                        interface_event(iface, IFEV_DOWN);
+               mark_interface_down(iface);
+               system_flush_routes();
                iface->state = IFS_SETUP;
                break;
        }
@@ -316,10 +357,10 @@ interface_init(struct interface *iface, const char *name,
        INIT_LIST_HEAD(&iface->hotplug_list);
        interface_ip_init(&iface->proto_ip, iface);
        interface_ip_init(&iface->config_ip, iface);
+       avl_init(&iface->data, avl_strcmp, false, NULL);
        iface->config_ip.enabled = false;
 
        iface->main_dev.cb = interface_cb;
-       iface->l3_dev = &iface->main_dev;
 
        blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
                      blob_data(config), blob_len(config));
@@ -349,7 +390,47 @@ interface_add(struct interface *iface, struct blob_attr *config)
                iface->ifname = blobmsg_data(cur);
 
        iface->config = config;
-       vlist_add(&interfaces, &iface->node);
+       vlist_add(&interfaces, &iface->node, iface->name);
+}
+
+void
+interface_set_l3_dev(struct interface *iface, struct device *dev)
+{
+       bool enabled = iface->config_ip.enabled;
+       bool claimed = iface->l3_dev.claimed;
+
+       if (iface->l3_dev.dev == dev)
+               return;
+
+       interface_ip_set_enabled(&iface->config_ip, false);
+       interface_ip_flush(&iface->proto_ip);
+       device_add_user(&iface->l3_dev, dev);
+
+       if (dev) {
+               if (claimed)
+                       device_claim(&iface->l3_dev);
+               interface_ip_set_enabled(&iface->config_ip, enabled);
+       }
+}
+
+void
+interface_set_main_dev(struct interface *iface, struct device *dev)
+{
+       bool set_l3 = (iface->main_dev.dev == iface->l3_dev.dev);
+       bool claimed = iface->l3_dev.claimed;
+
+       if (iface->main_dev.dev == dev)
+               return;
+
+       if (set_l3)
+               interface_set_l3_dev(iface, dev);
+
+       device_add_user(&iface->main_dev, dev);
+       if (claimed)
+               device_claim(&iface->l3_dev);
+
+       if (!iface->l3_dev.dev)
+               interface_set_l3_dev(iface, dev);
 }
 
 int
@@ -388,7 +469,7 @@ interface_add_link(struct interface *iface, struct device *dev)
                        return UBUS_STATUS_NOT_SUPPORTED;
        }
 
-       device_add_user(&iface->main_dev, dev);
+       interface_set_main_dev(iface, dev);
        iface->main_dev.hotplug = true;
        return 0;
 }
@@ -469,15 +550,7 @@ interface_update_start(struct interface *iface)
 void
 interface_update_complete(struct interface *iface)
 {
-       struct device_route *route;
-
        interface_ip_update_complete(&iface->proto_ip);
-       vlist_for_each_element(&iface->config_ip.route, route, node) {
-               if (iface->l3_dev->dev) {
-                       system_add_route(iface->l3_dev->dev, route);
-                       route->enabled = true;
-               }
-       }
 }
 
 static void
@@ -514,11 +587,21 @@ interface_change_config(struct interface *if_old, struct interface *if_new)
                goto reload;
        }
 
-       if (if_old->proto_ip.no_defaultroute != if_new->proto_ip.no_defaultroute) {
-               if_old->proto_ip.no_defaultroute = if_new->proto_ip.no_defaultroute;
-               interface_ip_set_enabled(&if_old->proto_ip, if_old->proto_ip.enabled);
+#define UPDATE(field) ({                                               \
+               bool __changed = (if_old->field != if_new->field);      \
+               if_old->field = if_new->field;                          \
+               __changed;                                              \
+       })
+
+       if (UPDATE(metric) || UPDATE(proto_ip.no_defaultroute)) {
+               interface_ip_set_enabled(&if_old->config_ip, false);
+               interface_ip_set_enabled(&if_old->config_ip, if_new->config_ip.enabled);
+               interface_ip_set_enabled(&if_old->proto_ip, false);
+               interface_ip_set_enabled(&if_old->proto_ip, if_new->proto_ip.enabled);
        }
 
+#undef UPDATE
+
        goto out;
 
 reload:
@@ -553,8 +636,7 @@ interface_update(struct vlist_tree *tree, struct vlist_node *node_new,
 static void __init
 interface_init_list(void)
 {
-       vlist_init(&interfaces, avl_strcmp, interface_update,
-                  struct interface, node, name);
+       vlist_init(&interfaces, avl_strcmp, interface_update);
        interfaces.keep_old = true;
        interfaces.no_delete = true;
 }