From patchwork Fri Nov 20 05:40:34 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Schiller X-Patchwork-Id: 329765 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,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 C7520C64E7C for ; Fri, 20 Nov 2020 05:41:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 87A392223F for ; Fri, 20 Nov 2020 05:41:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726297AbgKTFlO (ORCPT ); Fri, 20 Nov 2020 00:41:14 -0500 Received: from mxout70.expurgate.net ([194.37.255.70]:33631 "EHLO mxout70.expurgate.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725858AbgKTFlN (ORCPT ); Fri, 20 Nov 2020 00:41:13 -0500 Received: from [127.0.0.1] (helo=localhost) by relay.expurgate.net with smtp (Exim 4.90) (envelope-from ) id 1kfzAU-0005Z1-7C; Fri, 20 Nov 2020 06:41:10 +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 1kfzAT-00047c-Go; Fri, 20 Nov 2020 06:41:09 +0100 Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id 18493240041; Fri, 20 Nov 2020 06:41:09 +0100 (CET) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id 9147C240040; Fri, 20 Nov 2020 06:41:08 +0100 (CET) Received: from mschiller01.dev.tdt.de (unknown [10.2.3.20]) by mail.dev.tdt.de (Postfix) with ESMTPSA id 2BDD420D9C; Fri, 20 Nov 2020 06:41:08 +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 v4 3/5] net/lapb: fix t1 timer handling for LAPB_STATE_0 Date: Fri, 20 Nov 2020 06:40:34 +0100 Message-ID: <20201120054036.15199-4-ms@dev.tdt.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201120054036.15199-1-ms@dev.tdt.de> References: <20201120054036.15199-1-ms@dev.tdt.de> MIME-Version: 1.0 X-purgate-type: clean X-purgate: clean X-purgate-ID: 151534::1605850870-000064E4-A303C394/0/0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.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 Fri Nov 20 05:40:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Schiller X-Patchwork-Id: 329764 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 974A5C63798 for ; Fri, 20 Nov 2020 05:42:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 452742237B for ; Fri, 20 Nov 2020 05:42:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726341AbgKTFlV (ORCPT ); Fri, 20 Nov 2020 00:41:21 -0500 Received: from mxout70.expurgate.net ([91.198.224.70]:7002 "EHLO mxout70.expurgate.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726310AbgKTFlV (ORCPT ); Fri, 20 Nov 2020 00:41:21 -0500 Received: from [127.0.0.1] (helo=localhost) by relay.expurgate.net with smtp (Exim 4.92) (envelope-from ) id 1kfzAa-000Rwk-Qd; Fri, 20 Nov 2020 06:41:16 +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 1kfzAa-00042z-5u; Fri, 20 Nov 2020 06:41:16 +0100 Received: from securemail.tdt.de (localhost [127.0.0.1]) by securemail.tdt.de (Postfix) with ESMTP id E6D57240041; Fri, 20 Nov 2020 06:41:15 +0100 (CET) Received: from mail.dev.tdt.de (unknown [10.2.4.42]) by securemail.tdt.de (Postfix) with ESMTP id 694BA240040; Fri, 20 Nov 2020 06:41:15 +0100 (CET) Received: from mschiller01.dev.tdt.de (unknown [10.2.3.20]) by mail.dev.tdt.de (Postfix) with ESMTPSA id 35A6620D9C; Fri, 20 Nov 2020 06:41:15 +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 v4 4/5] net/x25: fix restart request/confirm handling Date: Fri, 20 Nov 2020 06:40:35 +0100 Message-ID: <20201120054036.15199-5-ms@dev.tdt.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20201120054036.15199-1-ms@dev.tdt.de> References: <20201120054036.15199-1-ms@dev.tdt.de> MIME-Version: 1.0 X-purgate: clean X-purgate-ID: 151534::1605850876-00008E89-AF40F9A9/0/0 X-purgate-type: clean Precedence: bulk List-ID: X-Mailing-List: netdev@vger.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;