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); } /* From patchwork Tue Nov 24 09:35:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Schiller X-Patchwork-Id: 11927717 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=ham 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 0FEAAC64E7A for ; Tue, 24 Nov 2020 09:36:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D149F2076B for ; Tue, 24 Nov 2020 09:36:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731298AbgKXJgO (ORCPT ); Tue, 24 Nov 2020 04:36:14 -0500 Received: from mxout70.expurgate.net ([194.37.255.70]:38559 "EHLO mxout70.expurgate.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727901AbgKXJgN (ORCPT ); Tue, 24 Nov 2020 04:36:13 -0500 Received: from [127.0.0.1] (helo=localhost) by relay.expurgate.net with smtp (Exim 4.90) (envelope-from ) id 1khUk4-0005zY-Ex; Tue, 24 Nov 2020 10:36:08 +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 1khUk3-0001zV-Nk; Tue, 24 Nov 2020 10:36:07 +0100 Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id 497C8240041; Tue, 24 Nov 2020 10:36:07 +0100 (CET) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id C0C2B240040; Tue, 24 Nov 2020 10:36:06 +0100 (CET) Received: from mschiller01.dev.tdt.de (unknown [10.2.3.20]) by mail.dev.tdt.de (Postfix) with ESMTPSA id 3B10F20115; Tue, 24 Nov 2020 10:36:01 +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 2/5] net/lapb: support netdev events Date: Tue, 24 Nov 2020 10:35:35 +0100 Message-ID: <20201124093538.21177-3-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-ID: 151534::1606210568-000013A4-830CFDC4/0/0 X-purgate-type: clean X-purgate: clean Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This patch allows layer2 (LAPB) to react to netdev events itself and avoids the detour via layer3 (X.25). 1. Establish layer2 on NETDEV_UP events, if the carrier is already up. 2. Call lapb_disconnect_request() on NETDEV_GOING_DOWN events to signal the peer that the connection will go down. (Only when the carrier is up.) 2. When a NETDEV_DOWN event occur, clear all queues, enter state LAPB_STATE_0 and stop all timers. 3. The NETDEV_CHANGE event makes it possible to handle carrier loss and detection. In case of Carrier Loss, clear all queues, enter state LAPB_STATE_0 and stop all timers. In case of Carrier Detection, we start timer t1 on a DCE interface, and on a DTE interface we change to state LAPB_STATE_1 and start sending SABM(E). Signed-off-by: Martin Schiller --- net/lapb/lapb_iface.c | 94 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) diff --git a/net/lapb/lapb_iface.c b/net/lapb/lapb_iface.c index 3c03f6512c5f..f226d354aaf0 100644 --- a/net/lapb/lapb_iface.c +++ b/net/lapb/lapb_iface.c @@ -418,14 +418,108 @@ int lapb_data_transmit(struct lapb_cb *lapb, struct sk_buff *skb) return used; } +/* Handle device status changes. */ +static int lapb_device_event(struct notifier_block *this, unsigned long event, + void *ptr) +{ + struct net_device *dev = netdev_notifier_info_to_dev(ptr); + struct lapb_cb *lapb; + + if (!net_eq(dev_net(dev), &init_net)) + return NOTIFY_DONE; + + if (dev->type == ARPHRD_X25) { + switch (event) { + case NETDEV_UP: + lapb_dbg(0, "(%p) Interface up: %s\n", dev, + dev->name); + + if (netif_carrier_ok(dev)) { + lapb = lapb_devtostruct(dev); + if (!lapb) + break; + + lapb_dbg(0, "(%p): Carrier is already up: %s\n", + dev, dev->name); + if (lapb->mode & LAPB_DCE) { + lapb_start_t1timer(lapb); + } else { + if (lapb->state == LAPB_STATE_0) { + lapb->state = LAPB_STATE_1; + lapb_establish_data_link(lapb); + } + } + } + break; + case NETDEV_GOING_DOWN: + if (netif_carrier_ok(dev)) + lapb_disconnect_request(dev); + break; + case NETDEV_DOWN: + lapb = lapb_devtostruct(dev); + if (!lapb) + break; + + lapb_dbg(0, "(%p) Interface down: %s\n", dev, + dev->name); + lapb_dbg(0, "(%p) S%d -> S0\n", dev, + lapb->state); + lapb_clear_queues(lapb); + lapb->state = LAPB_STATE_0; + lapb->n2count = 0; + lapb_stop_t1timer(lapb); + lapb_stop_t2timer(lapb); + break; + case NETDEV_CHANGE: + lapb = lapb_devtostruct(dev); + if (!lapb) + break; + + if (netif_carrier_ok(dev)) { + lapb_dbg(0, "(%p): Carrier detected: %s\n", + dev, dev->name); + if (lapb->mode & LAPB_DCE) { + lapb_start_t1timer(lapb); + } else { + if (lapb->state == LAPB_STATE_0) { + lapb->state = LAPB_STATE_1; + lapb_establish_data_link(lapb); + } + } + } else { + lapb_dbg(0, "(%p) Carrier lost: %s\n", dev, + dev->name); + lapb_dbg(0, "(%p) S%d -> S0\n", dev, + lapb->state); + lapb_clear_queues(lapb); + lapb->state = LAPB_STATE_0; + lapb->n2count = 0; + lapb_stop_t1timer(lapb); + lapb_stop_t2timer(lapb); + } + break; + } + } + + return NOTIFY_DONE; +} + +static struct notifier_block lapb_dev_notifier = { + .notifier_call = lapb_device_event, +}; + static int __init lapb_init(void) { + register_netdevice_notifier(&lapb_dev_notifier); + return 0; } static void __exit lapb_exit(void) { WARN_ON(!list_empty(&lapb_list)); + + unregister_netdevice_notifier(&lapb_dev_notifier); } MODULE_AUTHOR("Jonathan Naylor "); From patchwork Tue Nov 24 09:35:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Schiller X-Patchwork-Id: 11927719 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 8D474C56201 for ; Tue, 24 Nov 2020 09:36:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 413B32137B for ; Tue, 24 Nov 2020 09:36:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731339AbgKXJgX (ORCPT ); Tue, 24 Nov 2020 04:36:23 -0500 Received: from mxout70.expurgate.net ([91.198.224.70]:36390 "EHLO mxout70.expurgate.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731310AbgKXJgT (ORCPT ); Tue, 24 Nov 2020 04:36:19 -0500 Received: from [127.0.0.1] (helo=localhost) by relay.expurgate.net with smtp (Exim 4.92) (envelope-from ) id 1khUkB-000PIb-4V; Tue, 24 Nov 2020 10:36:15 +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 4.92) (envelope-from ) id 1khUkA-000AJE-9s; Tue, 24 Nov 2020 10:36:14 +0100 Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id 11591240041; Tue, 24 Nov 2020 10:36:14 +0100 (CET) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id 88F5E240040; Tue, 24 Nov 2020 10:36:13 +0100 (CET) Received: from mschiller01.dev.tdt.de (unknown [10.2.3.20]) by mail.dev.tdt.de (Postfix) with ESMTPSA id 1775020115; Tue, 24 Nov 2020 10:36:13 +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 3/5] net/lapb: fix t1 timer handling for LAPB_STATE_0 Date: Tue, 24 Nov 2020 10:35:36 +0100 Message-ID: <20201124093538.21177-4-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-ID: 151534::1606210574-00016B9D-9671951C/0/0 X-purgate-type: clean X-purgate: clean Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org 1. DTE interface changes immediately to LAPB_STATE_1 and start sending SABM(E). 2. DCE interface sends N2-times DM and changes to LAPB_STATE_1 afterwards if there is no response in the meantime. Signed-off-by: Martin Schiller --- net/lapb/lapb_timer.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/net/lapb/lapb_timer.c b/net/lapb/lapb_timer.c index 8f5b17001a07..baa247fe4ed0 100644 --- a/net/lapb/lapb_timer.c +++ b/net/lapb/lapb_timer.c @@ -85,11 +85,18 @@ static void lapb_t1timer_expiry(struct timer_list *t) switch (lapb->state) { /* - * If we are a DCE, keep going DM .. DM .. DM + * If we are a DCE, send DM up to N2 times, then switch to + * STATE_1 and send SABM(E). */ case LAPB_STATE_0: - if (lapb->mode & LAPB_DCE) + if (lapb->mode & LAPB_DCE && + lapb->n2count != lapb->n2) { + lapb->n2count++; lapb_send_control(lapb, LAPB_DM, LAPB_POLLOFF, LAPB_RESPONSE); + } else { + lapb->state = LAPB_STATE_1; + lapb_establish_data_link(lapb); + } break; /* From patchwork Tue Nov 24 09:35:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Schiller X-Patchwork-Id: 11927721 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=ham 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 DDA72C63798 for ; Tue, 24 Nov 2020 09:36:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9BA7D20888 for ; Tue, 24 Nov 2020 09:36:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731354AbgKXJg0 (ORCPT ); Tue, 24 Nov 2020 04:36:26 -0500 Received: from mxout70.expurgate.net ([91.198.224.70]:56643 "EHLO mxout70.expurgate.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731329AbgKXJgY (ORCPT ); Tue, 24 Nov 2020 04:36:24 -0500 Received: from [127.0.0.1] (helo=localhost) by relay.expurgate.net with smtp (Exim 4.92) (envelope-from ) id 1khUkF-000677-Pd; Tue, 24 Nov 2020 10:36:19 +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 4.92) (envelope-from ) id 1khUkF-00066e-5C; Tue, 24 Nov 2020 10:36:19 +0100 Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id D2FF7240041; Tue, 24 Nov 2020 10:36:18 +0100 (CET) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id 55525240040; Tue, 24 Nov 2020 10:36:18 +0100 (CET) Received: from mschiller01.dev.tdt.de (unknown [10.2.3.20]) by mail.dev.tdt.de (Postfix) with ESMTPSA id 2590720115; Tue, 24 Nov 2020 10:36:18 +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 4/5] net/x25: fix restart request/confirm handling Date: Tue, 24 Nov 2020 10:35:37 +0100 Message-ID: <20201124093538.21177-5-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: clean X-purgate-type: clean X-purgate-ID: 151534::1606210579-00017060-AA459F4E/0/0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org We have to take the actual link state into account to handle restart requests/confirms well. Signed-off-by: Martin Schiller --- net/x25/x25_link.c | 41 +++++++++++++++++++++++++++++++++-------- 1 file changed, 33 insertions(+), 8 deletions(-) diff --git a/net/x25/x25_link.c b/net/x25/x25_link.c index 11e868aa625d..f92073f3cb11 100644 --- a/net/x25/x25_link.c +++ b/net/x25/x25_link.c @@ -74,16 +74,43 @@ void x25_link_control(struct sk_buff *skb, struct x25_neigh *nb, switch (frametype) { case X25_RESTART_REQUEST: - confirm = !x25_t20timer_pending(nb); - x25_stop_t20timer(nb); - nb->state = X25_LINK_STATE_3; - if (confirm) + switch (nb->state) { + case X25_LINK_STATE_2: + confirm = !x25_t20timer_pending(nb); + x25_stop_t20timer(nb); + nb->state = X25_LINK_STATE_3; + if (confirm) + x25_transmit_restart_confirmation(nb); + break; + case X25_LINK_STATE_3: + /* clear existing virtual calls */ + x25_kill_by_neigh(nb); + x25_transmit_restart_confirmation(nb); + break; + } break; case X25_RESTART_CONFIRMATION: - x25_stop_t20timer(nb); - nb->state = X25_LINK_STATE_3; + switch (nb->state) { + case X25_LINK_STATE_2: + if (x25_t20timer_pending(nb)) { + x25_stop_t20timer(nb); + nb->state = X25_LINK_STATE_3; + } else { + x25_transmit_restart_request(nb); + x25_start_t20timer(nb); + } + break; + case X25_LINK_STATE_3: + /* clear existing virtual calls */ + x25_kill_by_neigh(nb); + + x25_transmit_restart_request(nb); + nb->state = X25_LINK_STATE_2; + x25_start_t20timer(nb); + break; + } break; case X25_DIAGNOSTIC: @@ -214,8 +241,6 @@ void x25_link_established(struct x25_neigh *nb) { switch (nb->state) { case X25_LINK_STATE_0: - nb->state = X25_LINK_STATE_2; - break; case X25_LINK_STATE_1: x25_transmit_restart_request(nb); nb->state = X25_LINK_STATE_2; From patchwork Tue Nov 24 09:35:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Schiller X-Patchwork-Id: 11927723 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 242A5C64E7A for ; Tue, 24 Nov 2020 09:36:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EC1F320888 for ; Tue, 24 Nov 2020 09:36:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731370AbgKXJg2 (ORCPT ); Tue, 24 Nov 2020 04:36:28 -0500 Received: from mxout70.expurgate.net ([194.37.255.70]:34137 "EHLO mxout70.expurgate.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731310AbgKXJg1 (ORCPT ); Tue, 24 Nov 2020 04:36:27 -0500 Received: from [127.0.0.1] (helo=localhost) by relay.expurgate.net with smtp (Exim 4.90) (envelope-from ) id 1khUkJ-0005FN-Mn; Tue, 24 Nov 2020 10:36:23 +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 1khUkI-000AIP-W4; Tue, 24 Nov 2020 10:36:23 +0100 Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id 86386240040; Tue, 24 Nov 2020 10:36:22 +0100 (CET) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id 0563F240041; Tue, 24 Nov 2020 10:36:22 +0100 (CET) Received: from mschiller01.dev.tdt.de (unknown [10.2.3.20]) by mail.dev.tdt.de (Postfix) with ESMTPSA id D331F20115; Tue, 24 Nov 2020 10:36:21 +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 5/5] net/x25: remove x25_kill_by_device() Date: Tue, 24 Nov 2020 10:35:38 +0100 Message-ID: <20201124093538.21177-6-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::1606210583-000074F7-9A127064/0/0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Remove obsolete function x25_kill_by_device(). It's not used any more. Signed-off-by: Martin Schiller --- net/x25/af_x25.c | 16 ---------------- 1 file changed, 16 deletions(-) diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c index 313a6222ded9..1432a05805ab 100644 --- a/net/x25/af_x25.c +++ b/net/x25/af_x25.c @@ -199,22 +199,6 @@ static void x25_remove_socket(struct sock *sk) write_unlock_bh(&x25_list_lock); } -/* - * Kill all bound sockets on a dropped device. - */ -static void x25_kill_by_device(struct net_device *dev) -{ - struct sock *s; - - write_lock_bh(&x25_list_lock); - - sk_for_each(s, &x25_list) - if (x25_sk(s)->neighbour && x25_sk(s)->neighbour->dev == dev) - x25_disconnect(s, ENETUNREACH, 0, 0); - - write_unlock_bh(&x25_list_lock); -} - /* * Handle device status changes. */