From mboxrd@z Thu Jan 1 00:00:00 1970 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=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 F3D05C55178 for ; Thu, 29 Oct 2020 07:53:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 944A320782 for ; Thu, 29 Oct 2020 07:53:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="px+wcjAc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727243AbgJ2HYr (ORCPT ); Thu, 29 Oct 2020 03:24:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55392 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726900AbgJ2HYg (ORCPT ); Thu, 29 Oct 2020 03:24:36 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86440C08EA74; Thu, 29 Oct 2020 00:06:40 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id s22so1571503pga.9; Thu, 29 Oct 2020 00:06:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=6TmT0zpWssi6omB7JYKtqocDaBeiltFJDNS384mLiKE=; b=px+wcjAcheTBz1Cj4SeFNo3F6/MkW+W9Aq83xTXOixoWjGtA92gDg2bbck9EJszVc4 Qxkq+zKT+Z7M/XUNQA9vSJbZA5yh6lq3K277ac4v38/KoC9wro/vKQPSo9rMfW7tQaOZ 89eC55UQXOngRgz4xjxLnjb384GF7enlj1zyrDQ/X1AYbLDlMLEBNAx0gVjBxME8k0Y9 b7bbQBwmKS0Mw0KxzuaJIaM0Hll4eFLzjQEOB+NWw76kYf11eAER2S/nbubOdhUnSRVH unqAFSa5N+bCaBzpU+QW6XbKV+1D88lbxEBhxkltqSCTYMm5R3KWMTLvCH8DEWDKsU7h vw9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=6TmT0zpWssi6omB7JYKtqocDaBeiltFJDNS384mLiKE=; b=PbT4TYYKqVvzjmB7iRi30adKTKIJOLtaRbaRakJI+EuJnuWSQzGs6Xv4BAnU0JJEQF MVmji7GTutQsKu1vWa/0V91u5PGcxUr+De12vp6RBYpCL7l6XzTVA7tcSZpeYJ0b+hBU LKWk0wA7e1rzKp+ZvB0div30uk+ApPDHYCUGReXDxSe1q/xIUd5soZo+doSLqzAywVtB tDstF7FWkioYOSspZrXqdg5U4yAyg3P8iZDR3Ug/5NbeMdVvv3ZfOKcE00+gn4qp5zB3 H8AjZo00SIDB9dTVmHRwza+d3DK/3bqW35PBUBkfZumB0zYm9SNqzJK0h0V5yzz4BFkW Qh2g== X-Gm-Message-State: AOAM5333lEc1dkubg1w5ZQbY8vWQMXNpGaMOShLSC6f7v2l9bAJO9+C0 kYKM8/P2uD42Qvu3LqwGoOpQVBfR2k4= X-Google-Smtp-Source: ABdhPJwdX3rX3fATd0/bsFeAYyc1I2nUKSVcQmdyN3LgXeGyKRzr0mECpZQf+SLr9ZuJ3X71gVHDew== X-Received: by 2002:a17:90a:a394:: with SMTP id x20mr2849391pjp.213.1603955199736; Thu, 29 Oct 2020 00:06:39 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id nm11sm1747483pjb.24.2020.10.29.00.06.38 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 29 Oct 2020 00:06:39 -0700 (PDT) From: Xin Long To: network dev , linux-sctp@vger.kernel.org Cc: Marcelo Ricardo Leitner , Neil Horman , Michael Tuexen , davem@davemloft.net, Jakub Kicinski , gnault@redhat.com, pabeni@redhat.com, willemdebruijn.kernel@gmail.com Subject: [PATCHv5 net-next 10/16] sctp: add udphdr to overhead when udp_port is set Date: Thu, 29 Oct 2020 15:05:04 +0800 Message-Id: <1032fd094f807a870ca965e8355daf0be068008d.1603955041.git.lucien.xin@gmail.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <2b2703eb6a2cc84b7762ee7484a9a57408db162b.1603955040.git.lucien.xin@gmail.com> References: <48053c3bf48a46899bc0130dc43adca1e6925581.1603955040.git.lucien.xin@gmail.com> <4f439ed717442a649ba78dc0efc6f121208a9995.1603955040.git.lucien.xin@gmail.com> <1cfd9ca0154d35389b25f68457ea2943a19e7da2.1603955040.git.lucien.xin@gmail.com> <3c26801d36575d0e9c9bd260e6c1f1b67e4b721e.1603955040.git.lucien.xin@gmail.com> <279d266bc34ebc439114f39da983dc08845ea37a.1603955040.git.lucien.xin@gmail.com> <066bbdcf83188bbc62b6c458f2a0fd8f06f41640.1603955040.git.lucien.xin@gmail.com> <2b2703eb6a2cc84b7762ee7484a9a57408db162b.1603955040.git.lucien.xin@gmail.com> In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-sctp@vger.kernel.org sctp_mtu_payload() is for calculating the frag size before making chunks from a msg. So we should only add udphdr size to overhead when udp socks are listening, as only then sctp can handle the incoming sctp over udp packets and outgoing sctp over udp packets will be possible. Note that we can't do this according to transport->encap_port, as different transports may be set to different values, while the chunks were made before choosing the transport, we could not be able to meet all rfc6951#section-5.6 recommends. v1->v2: - Add udp_port for sctp_sock to avoid a potential race issue, it will be used in xmit path in the next patch. Signed-off-by: Xin Long --- include/net/sctp/sctp.h | 7 +++++-- include/net/sctp/structs.h | 1 + net/sctp/socket.c | 1 + 3 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index bfd87a0..86f74f2 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -578,10 +578,13 @@ static inline __u32 sctp_mtu_payload(const struct sctp_sock *sp, { __u32 overhead = sizeof(struct sctphdr) + extra; - if (sp) + if (sp) { overhead += sp->pf->af->net_header_len; - else + if (sp->udp_port) + overhead += sizeof(struct udphdr); + } else { overhead += sizeof(struct ipv6hdr); + } if (WARN_ON_ONCE(mtu && mtu <= overhead)) mtu = overhead; diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h index 81464ae..80f7149 100644 --- a/include/net/sctp/structs.h +++ b/include/net/sctp/structs.h @@ -178,6 +178,7 @@ struct sctp_sock { */ __u32 hbinterval; + __be16 udp_port; __be16 encap_port; /* This is the max_retrans value for new associations. */ diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 2a9ee9b..a710917 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4928,6 +4928,7 @@ static int sctp_init_sock(struct sock *sk) * be modified via SCTP_PEER_ADDR_PARAMS */ sp->hbinterval = net->sctp.hb_interval; + sp->udp_port = htons(net->sctp.udp_port); sp->encap_port = htons(net->sctp.encap_port); sp->pathmaxrxt = net->sctp.max_retrans_path; sp->pf_retrans = net->sctp.pf_retrans; -- 2.1.0