From patchwork Tue Sep 14 14:46:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Dichtel X-Patchwork-Id: 12493811 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,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 73C22C433EF for ; Tue, 14 Sep 2021 14:47:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 58675603E8 for ; Tue, 14 Sep 2021 14:47:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234453AbhINOsm (ORCPT ); Tue, 14 Sep 2021 10:48:42 -0400 Received: from host.78.145.23.62.rev.coltfrance.com ([62.23.145.78]:45660 "EHLO proxy.6wind.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S234990AbhINOsQ (ORCPT ); Tue, 14 Sep 2021 10:48:16 -0400 Received: from bretzel (unknown [10.16.0.57]) by proxy.6wind.com (Postfix) with ESMTPS id BA151B41E2B; Tue, 14 Sep 2021 16:46:56 +0200 (CEST) Received: from dichtel by bretzel with local (Exim 4.92) (envelope-from ) id 1mQ9i4-0001nP-N3; Tue, 14 Sep 2021 16:46:56 +0200 From: Nicolas Dichtel To: steffen.klassert@secunet.com, davem@davemloft.net, kuba@kernel.org, antony.antony@secunet.com Cc: netdev@vger.kernel.org, Nicolas Dichtel Subject: [PATCH ipsec v3 2/2] xfrm: notify default policy on update Date: Tue, 14 Sep 2021 16:46:34 +0200 Message-Id: <20210914144635.6850-3-nicolas.dichtel@6wind.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210914144635.6850-1-nicolas.dichtel@6wind.com> References: <20210908072341.5647-1-nicolas.dichtel@6wind.com> <20210914144635.6850-1-nicolas.dichtel@6wind.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This configuration knob is very sensible, it should be notified when changing. Fixes: 2d151d39073a ("xfrm: Add possibility to set the default to block if we have no policy") Signed-off-by: Nicolas Dichtel --- net/xfrm/xfrm_user.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 90c88390f1fe..0eba0c27c665 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1961,6 +1961,36 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, return skb; } +static int xfrm_notify_userpolicy(struct net *net) +{ + struct xfrm_userpolicy_default *up; + int len = NLMSG_ALIGN(sizeof(*up)); + struct nlmsghdr *nlh; + struct sk_buff *skb; + + skb = nlmsg_new(len, GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + + nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_GETDEFAULT, sizeof(*up), 0); + if (nlh == NULL) { + kfree_skb(skb); + return -EMSGSIZE; + } + + up = nlmsg_data(nlh); + up->in = net->xfrm.policy_default & XFRM_POL_DEFAULT_IN ? + XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT; + up->fwd = net->xfrm.policy_default & XFRM_POL_DEFAULT_FWD ? + XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT; + up->out = net->xfrm.policy_default & XFRM_POL_DEFAULT_OUT ? + XFRM_USERPOLICY_BLOCK : XFRM_USERPOLICY_ACCEPT; + + nlmsg_end(skb, nlh); + + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); +} + static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { @@ -1984,6 +2014,7 @@ static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh, rt_genid_bump_all(net); + xfrm_notify_userpolicy(net); return 0; }