From patchwork Tue Nov 24 09:35:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Schiller X-Patchwork-Id: 11927715 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8028C56201 for ; Tue, 24 Nov 2020 09:36:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7568B2076E for ; Tue, 24 Nov 2020 09:36:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731179AbgKXJgE (ORCPT ); Tue, 24 Nov 2020 04:36:04 -0500 Received: from mxout70.expurgate.net ([194.37.255.70]:47671 "EHLO mxout70.expurgate.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727901AbgKXJgD (ORCPT ); Tue, 24 Nov 2020 04:36:03 -0500 Received: from [127.0.0.1] (helo=localhost) by relay.expurgate.net with smtp (Exim 4.90) (envelope-from ) id 1khUjv-00006J-HE; Tue, 24 Nov 2020 10:35:59 +0100 Received: from [195.243.126.94] (helo=securemail.tdt.de) by relay.expurgate.net with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90) (envelope-from ) id 1khUjt-0004vq-P9; Tue, 24 Nov 2020 10:35:57 +0100 Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id 55DE7240041; Tue, 24 Nov 2020 10:35:57 +0100 (CET) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id CC2CB240040; Tue, 24 Nov 2020 10:35:56 +0100 (CET) Received: from mschiller01.dev.tdt.de (unknown [10.2.3.20]) by mail.dev.tdt.de (Postfix) with ESMTPSA id 668C720115; Tue, 24 Nov 2020 10:35:56 +0100 (CET) From: Martin Schiller To: andrew.hendry@gmail.com, davem@davemloft.net, kuba@kernel.org, xie.he.0141@gmail.com Cc: linux-x25@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Martin Schiller Subject: [PATCH net-next v5 1/5] net/x25: handle additional netdev events Date: Tue, 24 Nov 2020 10:35:34 +0100 Message-ID: <20201124093538.21177-2-ms@dev.tdt.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201124093538.21177-1-ms@dev.tdt.de> References: <20201124093538.21177-1-ms@dev.tdt.de> MIME-Version: 1.0 X-purgate-type: clean X-purgate: clean X-purgate-ID: 151534::1606210559-000064E4-5DC19E8D/0/0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org 1. Add / remove x25_link_device by NETDEV_REGISTER/UNREGISTER and also by NETDEV_POST_TYPE_CHANGE/NETDEV_PRE_TYPE_CHANGE. This change is needed so that the x25_neigh struct for an interface is already created when it shows up and is kept independently if the interface goes UP or DOWN. This is used in an upcomming commit, where x25 params of an neighbour will get configurable through ioctls. 2. NETDEV_CHANGE event makes it possible to handle carrier loss and detection. If carrier is lost, clean up everything related to this neighbour by calling x25_link_terminated(). 3. Also call x25_link_terminated() for NETDEV_DOWN events and remove the call to x25_clear_forward_by_dev() in x25_route_device_down(), as this is already called by x25_kill_by_neigh() which gets called by x25_link_terminated(). 4. Do nothing for NETDEV_UP and NETDEV_GOING_DOWN events, as these will be handled in layer 2 (LAPB) and layer3 (X.25) will be informed by layer2 when layer2 link is established and layer3 link should be initiated. Signed-off-by: Martin Schiller --- net/x25/af_x25.c | 22 ++++++++++++++++------ net/x25/x25_link.c | 6 +++--- net/x25/x25_route.c | 3 --- 3 files changed, 19 insertions(+), 12 deletions(-) diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index 046d3fee66a9..313a6222ded9 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -233,21 +233,31 @@ static int x25_device_event(struct notifier_block *this, unsigned long event, #endif ) { switch (event) { - case NETDEV_UP: + case NETDEV_REGISTER: + case NETDEV_POST_TYPE_CHANGE: x25_link_device_up(dev); break; - case NETDEV_GOING_DOWN: + case NETDEV_DOWN: nb = x25_get_neigh(dev); if (nb) { - x25_terminate_link(nb); + x25_link_terminated(nb); x25_neigh_put(nb); } - break; - case NETDEV_DOWN: - x25_kill_by_device(dev); x25_route_device_down(dev); + break; + case NETDEV_PRE_TYPE_CHANGE: + case NETDEV_UNREGISTER: x25_link_device_down(dev); break; + case NETDEV_CHANGE: + if (!netif_carrier_ok(dev)) { + nb = x25_get_neigh(dev); + if (nb) { + x25_link_terminated(nb); + x25_neigh_put(nb); + } + } + break; } } diff --git a/net/x25/x25_link.c b/net/x25/x25_link.c index fdae054b7dc1..11e868aa625d 100644 --- a/net/x25/x25_link.c +++ b/net/x25/x25_link.c @@ -232,6 +232,9 @@ void x25_link_established(struct x25_neigh *nb) void x25_link_terminated(struct x25_neigh *nb) { nb->state = X25_LINK_STATE_0; + skb_queue_purge(&nb->queue); + x25_stop_t20timer(nb); + /* Out of order: clear existing virtual calls (X.25 03/93 4.6.3) */ x25_kill_by_neigh(nb); } @@ -277,9 +280,6 @@ void x25_link_device_up(struct net_device *dev) */ static void __x25_remove_neigh(struct x25_neigh *nb) { - skb_queue_purge(&nb->queue); - x25_stop_t20timer(nb); - if (nb->node.next) { list_del(&nb->node); x25_neigh_put(nb); diff --git a/net/x25/x25_route.c b/net/x25/x25_route.c index 00e46c9a5280..ec2a39e9b3e6 100644 --- a/net/x25/x25_route.c +++ b/net/x25/x25_route.c @@ -115,9 +115,6 @@ void x25_route_device_down(struct net_device *dev) __x25_remove_route(rt); } write_unlock_bh(&x25_route_list_lock); - - /* Remove any related forwarding */ - x25_clear_forward_by_dev(dev); } /*