device: Don't process link events anymore in device user specific callback handlers
[project/netifd.git] / interface.c
index 4ab243120c393dd2b492ca18adfef67655e37328..ffe79880779081327c2a5741310218c696c0efa6 100644 (file)
@@ -68,19 +68,16 @@ static const struct blobmsg_policy iface_attrs[IFACE_ATTR_MAX] = {
        [IFACE_ATTR_FORCE_LINK] = { .name = "force_link", .type = BLOBMSG_TYPE_BOOL },
 };
 
-static const struct uci_blob_param_info iface_attr_info[IFACE_ATTR_MAX] = {
-       [IFACE_ATTR_DNS] = { .type = BLOBMSG_TYPE_STRING },
-       [IFACE_ATTR_IP6CLASS] = { .type = BLOBMSG_TYPE_STRING },
-};
-
 const struct uci_blob_param_list interface_attr_list = {
        .n_params = IFACE_ATTR_MAX,
        .params = iface_attrs,
-       .info = iface_attr_info,
 };
 
 static void
-interface_clear_errors(struct interface *iface)
+set_config_state(struct interface *iface, enum interface_config_state s);
+
+static void
+interface_error_flush(struct interface *iface)
 {
        struct interface_error *error, *tmp;
 
@@ -90,6 +87,17 @@ interface_clear_errors(struct interface *iface)
        }
 }
 
+static void
+interface_clear_errors(struct interface *iface)
+{
+        /* don't flush the errors in case the configured protocol handler matches the
+           running protocol handler and is having the last error capability */
+       if (!(iface->proto &&
+              (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
+              (iface->proto->handler->name == iface->proto_handler->name)))
+               interface_error_flush(iface);
+}
+
 void interface_add_error(struct interface *iface, const char *subsystem,
                         const char *code, const char **data, int n_data)
 {
@@ -98,6 +106,14 @@ void interface_add_error(struct interface *iface, const char *subsystem,
        int *datalen = NULL;
        char *dest, *d_subsys, *d_code;
 
+        /* if the configured protocol handler has the last error support capability,
+           errors should only be added if the running protocol handler matches the
+           configured one */
+       if (iface->proto &&
+            (iface->proto->handler->flags & PROTO_FLAG_LASTERROR) &&
+            (iface->proto->handler->name != iface->proto_handler->name))
+               return;
+
        if (n_data) {
                len = n_data * sizeof(char *);
                datalen = alloca(len);
@@ -113,6 +129,11 @@ void interface_add_error(struct interface *iface, const char *subsystem,
        if (!error)
                return;
 
+       /* Only keep the last flagged error, prevent this list grows unlimitted in case the
+          protocol can't be established (e.g auth failure) */
+       if (iface->proto_handler->flags & PROTO_FLAG_LASTERROR)
+               interface_error_flush(iface);
+
        list_add_tail(&error->list, &iface->errors);
 
        dest = (char *) &error->data[n_data + 1];
@@ -121,7 +142,7 @@ void interface_add_error(struct interface *iface, const char *subsystem,
                memcpy(dest, data[i], datalen[i]);
                dest += datalen[i];
        }
-       error->data[n_data++] = NULL;
+       error->data[n_data] = NULL;
 
        if (subsystem)
                error->subsystem = strcpy(d_subsys, subsystem);
@@ -188,6 +209,7 @@ interface_event(struct interface *iface, enum interface_event ev)
 
        switch (ev) {
        case IFEV_UP:
+               interface_error_flush(iface);
                adev = iface->l3_dev.dev;
                /* fall through */
        case IFEV_DOWN:
@@ -237,9 +259,6 @@ __interface_set_down(struct interface *iface, bool force)
                interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, force);
                if (force)
                        interface_flush_state(iface);
-
-               if (iface->dynamic)
-                       vlist_delete(&interfaces, &iface->node);
                break;
 
        case IFS_DOWN:
@@ -314,14 +333,14 @@ interface_set_link_state(struct interface *iface, bool new_state)
 }
 
 static void
-interface_ext_cb(struct device_user *dep, enum device_event ev)
+interface_ext_dev_cb(struct device_user *dep, enum device_event ev)
 {
        if (ev == DEV_EVENT_REMOVE)
                device_remove_user(dep);
 }
 
 static void
-interface_cb(struct device_user *dep, enum device_event ev)
+interface_main_dev_cb(struct device_user *dep, enum device_event ev)
 {
        struct interface *iface;
        bool new_state = false;
@@ -353,6 +372,24 @@ interface_cb(struct device_user *dep, enum device_event ev)
        }
 }
 
+static void
+interface_l3_dev_cb(struct device_user *dep, enum device_event ev)
+{
+       struct interface *iface;
+
+       iface = container_of(dep, struct interface, l3_dev);
+       if (iface->l3_dev.dev == iface->main_dev.dev)
+               return;
+
+       switch (ev) {
+       case DEV_EVENT_LINK_DOWN:
+               interface_proto_event(iface->proto, PROTO_CMD_TEARDOWN, false);
+               break;
+       default:
+               break;
+       }
+}
+
 void
 interface_set_available(struct interface *iface, bool new_state)
 {
@@ -494,6 +531,21 @@ interface_alias_cb(struct interface_user *dep, struct interface *iface, enum int
        }
 }
 
+static void
+interface_set_device_config(struct interface *iface, struct device *dev)
+{
+       if (!dev || !dev->default_config)
+               return;
+
+       if (!iface->device_config &&
+           (!dev->iface_config || dev->config_iface != iface))
+               return;
+
+       dev->config_iface = iface;
+       dev->iface_config = iface->device_config;
+       device_apply_config(dev, dev->type, iface->config);
+}
+
 static void
 interface_claim_device(struct interface *iface)
 {
@@ -510,8 +562,7 @@ interface_claim_device(struct interface *iface)
        } else if (iface->ifname &&
                !(iface->proto_handler->flags & PROTO_FLAG_NODEV)) {
                dev = device_get(iface->ifname, true);
-               if (dev && dev->default_config && iface->device_config)
-                       device_set_config(dev, dev->type, iface->config);
+               interface_set_device_config(iface, dev);
        } else {
                dev = iface->ext_dev.dev;
        }
@@ -593,10 +644,12 @@ interface_handle_config_change(struct interface *iface)
        }
        if (iface->autostart && iface->available)
                interface_set_up(iface);
+       else if (iface->dynamic)
+               set_config_state(iface, IFC_REMOVE);
 }
 
 static void
-interface_proto_cb(struct interface_proto_state *state, enum interface_proto_event ev)
+interface_proto_event_cb(struct interface_proto_state *state, enum interface_proto_event ev)
 {
        struct interface *iface = state->iface;
 
@@ -655,7 +708,7 @@ void interface_set_proto_state(struct interface *iface, struct interface_proto_s
        if (!state)
                return;
 
-       state->proto_event = interface_proto_cb;
+       state->proto_event = interface_proto_event_cb;
        state->iface = iface;
 }
 
@@ -679,8 +732,9 @@ interface_alloc(const char *name, struct blob_attr *config)
        avl_init(&iface->data, avl_strcmp, false, NULL);
        iface->config_ip.enabled = false;
 
-       iface->main_dev.cb = interface_cb;
-       iface->ext_dev.cb = interface_ext_cb;
+       iface->main_dev.cb = interface_main_dev_cb;
+       iface->l3_dev.cb = interface_l3_dev_cb;
+       iface->ext_dev.cb = interface_ext_dev_cb;
 
        blobmsg_parse(iface_attrs, IFACE_ATTR_MAX, tb,
                      blob_data(config), blob_len(config));
@@ -789,7 +843,6 @@ static bool __interface_add(struct interface *iface, struct blob_attr *config, b
                        iface->ifname = blobmsg_data(cur);
        }
 
-
        iface->config = config;
        vlist_add(&interfaces, &iface->node, iface->name);
        return true;
@@ -918,11 +971,9 @@ interface_handle_link(struct interface *iface, const char *name, bool add, bool
        }
 
        if (add) {
+               interface_set_device_config(iface, dev);
                device_set_present(dev, true);
-               if (iface->device_config && dev->default_config)
-                       device_set_config(dev, dev->type, iface->config);
 
-               system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
                ret = interface_add_link(iface, dev, link_ext);
        } else {
                ret = interface_remove_link(iface, dev);
@@ -1016,6 +1067,35 @@ interface_replace_dns(struct interface_ip_settings *new, struct interface_ip_set
        vlist_simple_replace(&new->dns_search, &old->dns_search);
 }
 
+static bool
+interface_device_config_changed(struct interface *if_old, struct interface *if_new)
+{
+       struct blob_attr *ntb[__DEV_ATTR_MAX];
+       struct blob_attr *otb[__DEV_ATTR_MAX];
+       struct device *dev = if_old->main_dev.dev;
+       unsigned long diff = 0;
+
+       BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8);
+
+       if (!dev)
+               return false;
+
+       if (if_old->device_config != if_new->device_config)
+               return true;
+
+       if (!if_new->device_config)
+               return false;
+
+       blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, otb,
+               blob_data(if_old->config), blob_len(if_old->config));
+
+       blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, ntb,
+               blob_data(if_new->config), blob_len(if_new->config));
+
+       uci_blob_diff(ntb, otb, &device_attr_list, &diff);
+       return diff;
+}
+
 static void
 interface_change_config(struct interface *if_old, struct interface *if_new)
 {
@@ -1033,6 +1113,9 @@ interface_change_config(struct interface *if_old, struct interface *if_new)
                reload = true;
        }
 
+       if (!reload && interface_device_config_changed(if_old, if_new))
+               reload = true;
+
        if (FIELD_CHANGED_STR(ifname) ||
            if_old->proto_handler != if_new->proto_handler)
                reload = true;