From patchwork Thu Oct 8 09:48:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xin Long X-Patchwork-Id: 11822569 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=-12.8 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=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 46E2DC43467 for ; Thu, 8 Oct 2020 09:50:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DFCE021531 for ; Thu, 8 Oct 2020 09:50:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Al3wMu1S" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729350AbgJHJuj (ORCPT ); Thu, 8 Oct 2020 05:50:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41912 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729335AbgJHJui (ORCPT ); Thu, 8 Oct 2020 05:50:38 -0400 Received: from mail-pl1-x641.google.com (mail-pl1-x641.google.com [IPv6:2607:f8b0:4864:20::641]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9840BC061755; Thu, 8 Oct 2020 02:50:38 -0700 (PDT) Received: by mail-pl1-x641.google.com with SMTP id x5so2507840plo.6; Thu, 08 Oct 2020 02:50:38 -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=eHKwsdD2P/4UsoU1p41NzNCp0TnmAEioXR/YlvDUq0g=; b=Al3wMu1SjJLKcT9vC+aZ5/bYLMNPlgrmteGUTK30+HyUq7vxNcSnqMlTZ8T68ZV60+ viakhm0GU93UkNR/VXxLdGTjZgKETxQT/FDaYhOfl8+QF3++IC19H35Zq6E7kenhV4FZ KtiViO9X/RfqLbtS49dZKgvnNO03Lr0N4RS9YapAMM+2ie4VrZAXF9/XhRejgZ8JmXQZ gFQJjvhCnVoFXi9bKh4XVOX669rs1MrDh/Aq2ZX0Mkc/bq1TCgueWTYq7hrpSY1Dfk1c vNflcL99kiq87kzQgChfWXHCtD0bPrKZegCO/5LA4tJUU2shMaJ43TMehmJW4kUadWUW Ejgg== 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=eHKwsdD2P/4UsoU1p41NzNCp0TnmAEioXR/YlvDUq0g=; b=abQ2aJbtYvdaAmsdPXxZmNI01LRUzflPErJ0ALte3WFWIjqWiGF9F2jp/82r3ikTWf 9Q42oyIyuJCCWBfqGUPNAlGVbZ0rs1i6LzqRXQUfecS+8P7KWJcwaebQy5AbtUwHkrbs XX0ycOckxg/wLtRTiAchBBQ5Kb4HiB9TgCDCT805aLDoZqC58w90A4+RwnL+bUdrcPxE 8eAVT26Ptoky3k219TG/P+d4OyLP7mK4ogpmoNsZ64IpRRpWwADwwVerXU/EaQjIHe+g +eVy3UePh9lIBNSYAPfFMAgx2R2oQWDPVuNWyTVKeEUvdc5JnHKZddtuSEGYAB+/Nzft 76/w== X-Gm-Message-State: AOAM532QUDfVizJBGZDUd5cwRehCJfbsFVNG2JOkuZ6GmBwrYoj84r46 /f2Z6AkQw6x2OoVp2IRTiU6NnzQPAw4= X-Google-Smtp-Source: ABdhPJwMVa1K0ZNXOsQ+a1YeCThLJ3vRAy1nKg9x2aX+KLqZifBSUuVEoS+o1Rwk+qRmDEmwiBjpCA== X-Received: by 2002:a17:902:c3c2:b029:d3:df24:1584 with SMTP id j2-20020a170902c3c2b02900d3df241584mr7063024plj.33.1602150637897; Thu, 08 Oct 2020 02:50:37 -0700 (PDT) Received: from localhost ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id e19sm6940258pfl.135.2020.10.08.02.50.36 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Thu, 08 Oct 2020 02:50:37 -0700 (PDT) From: Xin Long To: network dev , linux-sctp@vger.kernel.org Cc: Marcelo Ricardo Leitner , Neil Horman , Michael Tuexen , davem@davemloft.net Subject: [PATCHv2 net-next 17/17] sctp: enable udp tunneling socks Date: Thu, 8 Oct 2020 17:48:13 +0800 Message-Id: <8ce0fde0d093d62e8969d1788a13921ed1516ad6.1602150362.git.lucien.xin@gmail.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: References: <052acb63198c44df41c5db17f8397eeb7c8bacfe.1602150362.git.lucien.xin@gmail.com> <483d9eec159b22172fe04dacd58d7f88dfc2f301.1602150362.git.lucien.xin@gmail.com> <17cab00046ea7fe36c8383925a4fc3fbc028c511.1602150362.git.lucien.xin@gmail.com> <6f5a15bba0e2b5d3da6be90fd222c5ee41691d32.1602150362.git.lucien.xin@gmail.com> <92d28810a72dee9d0d49e7433b65027cb52de191.1602150362.git.lucien.xin@gmail.com> <1128490426bfb52572ba338e7a631658da49f34c.1602150362.git.lucien.xin@gmail.com> <1d1b2e92f958add640d5be1e6eaec1ac5e4581ce.1602150362.git.lucien.xin@gmail.com> <5c0e9cf835f54c11f7e3014cab926bf10a47298d.1602150362.git.lucien.xin@gmail.com> <8815067eea44ffd7274b0038e48c2618c2e77916.1602150362.git.lucien.xin@gmail.com> In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch is to enable udp tunneling socks by calling sctp_udp_sock_start() in sctp_ctrlsock_init(), and sctp_udp_sock_stop() in sctp_ctrlsock_exit(). Also add sysctl udp_port to allow changing the listening sock's port by users. Wit this patch, the whole sctp over udp feature can be enabled and used. v1->v2: - Also update ctl_sock udp_port in proc_sctp_do_udp_port() where netns udp_port gets changed. Signed-off-by: Xin Long Reported-by: kernel test robot --- net/sctp/protocol.c | 5 +++++ net/sctp/sysctl.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+) diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index be002b7..79fb4b5 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -1469,6 +1469,10 @@ static int __net_init sctp_ctrlsock_init(struct net *net) if (status) pr_err("Failed to initialize the SCTP control sock\n"); + status = sctp_udp_sock_start(net); + if (status) + pr_err("Failed to initialize the SCTP udp tunneling sock\n"); + return status; } @@ -1476,6 +1480,7 @@ static void __net_exit sctp_ctrlsock_exit(struct net *net) { /* Free the control endpoint. */ inet_ctl_sock_destroy(net->sctp.ctl_sock); + sctp_udp_sock_stop(net); } static struct pernet_operations sctp_ctrlsock_ops = { diff --git a/net/sctp/sysctl.c b/net/sctp/sysctl.c index ecc1b5e..a723613 100644 --- a/net/sctp/sysctl.c +++ b/net/sctp/sysctl.c @@ -49,6 +49,8 @@ static int proc_sctp_do_rto_min(struct ctl_table *ctl, int write, void *buffer, size_t *lenp, loff_t *ppos); static int proc_sctp_do_rto_max(struct ctl_table *ctl, int write, void *buffer, size_t *lenp, loff_t *ppos); +static int proc_sctp_do_udp_port(struct ctl_table *ctl, int write, void *buffer, + size_t *lenp, loff_t *ppos); static int proc_sctp_do_alpha_beta(struct ctl_table *ctl, int write, void *buffer, size_t *lenp, loff_t *ppos); static int proc_sctp_do_auth(struct ctl_table *ctl, int write, @@ -292,6 +294,15 @@ static struct ctl_table sctp_net_table[] = { .proc_handler = proc_dointvec, }, { + .procname = "udp_port", + .data = &init_net.sctp.udp_port, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_sctp_do_udp_port, + .extra1 = SYSCTL_ZERO, + .extra2 = &udp_port_max, + }, + { .procname = "encap_port", .data = &init_net.sctp.encap_port, .maxlen = sizeof(int), @@ -487,6 +498,44 @@ static int proc_sctp_do_auth(struct ctl_table *ctl, int write, return ret; } +static int proc_sctp_do_udp_port(struct ctl_table *ctl, int write, + void *buffer, size_t *lenp, loff_t *ppos) +{ + struct net *net = current->nsproxy->net_ns; + unsigned int min = *(unsigned int *)ctl->extra1; + unsigned int max = *(unsigned int *)ctl->extra2; + struct ctl_table tbl; + int ret, new_value; + + memset(&tbl, 0, sizeof(struct ctl_table)); + tbl.maxlen = sizeof(unsigned int); + + if (write) + tbl.data = &new_value; + else + tbl.data = &net->sctp.udp_port; + + ret = proc_dointvec(&tbl, write, buffer, lenp, ppos); + if (write && ret == 0) { + struct sock *sk = net->sctp.ctl_sock; + + if (new_value > max || new_value < min) + return -EINVAL; + + net->sctp.udp_port = new_value; + sctp_udp_sock_stop(net); + ret = sctp_udp_sock_start(net); + if (ret) + net->sctp.udp_port = 0; + + lock_sock(sk); + sctp_sk(sk)->udp_port = net->sctp.udp_port; + release_sock(sk); + } + + return ret; +} + int sctp_sysctl_net_register(struct net *net) { struct ctl_table *table;