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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 D4B89C282CD for ; Mon, 28 Jan 2019 23:58:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9E0820881 for ; Mon, 28 Jan 2019 23:58:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728175AbfA1X6s (ORCPT ); Mon, 28 Jan 2019 18:58:48 -0500 Received: from mail.us.es ([193.147.175.20]:53054 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727745AbfA1X6P (ORCPT ); Mon, 28 Jan 2019 18:58:15 -0500 Received: from antivirus1-rhel7.int (unknown [192.168.2.11]) by mail.us.es (Postfix) with ESMTP id B4265F2701 for ; Tue, 29 Jan 2019 00:58:13 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id A58F6DA85D for ; Tue, 29 Jan 2019 00:58:13 +0100 (CET) Received: by antivirus1-rhel7.int (Postfix, from userid 99) id 9B66EDA86F; Tue, 29 Jan 2019 00:58:13 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 98AA0DA867; Tue, 29 Jan 2019 00:58:11 +0100 (CET) Received: from 192.168.1.97 (192.168.1.97) by antivirus1-rhel7.int (F-Secure/fsigk_smtp/550/antivirus1-rhel7.int); Tue, 29 Jan 2019 00:58:11 +0100 (CET) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/antivirus1-rhel7.int) Received: from salvia.here (sys.soleta.eu [212.170.55.40]) (Authenticated sender: pneira@us.es) by entrada.int (Postfix) with ESMTPA id 656DA4265A4C; Tue, 29 Jan 2019 00:58:11 +0100 (CET) X-SMTPAUTHUS: auth mail.us.es From: Pablo Neira Ayuso To: netfilter-devel@vger.kernel.org Cc: davem@davemloft.net, netdev@vger.kernel.org Subject: [PATCH 23/33] netfilter: nf_conntrack: provide modparam to always register conntrack hooks Date: Tue, 29 Jan 2019 00:57:40 +0100 Message-Id: <20190128235750.18412-24-pablo@netfilter.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190128235750.18412-1-pablo@netfilter.org> References: <20190128235750.18412-1-pablo@netfilter.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The connection tracking hooks can be optionally registered per netns when conntrack is specifically invoked from the ruleset since 0c66dc1ea3f0 ("netfilter: conntrack: register hooks in netns when needed by ruleset"). Then, since 4d3a57f23dec ("netfilter: conntrack: do not enable connection tracking unless needed"), the default behaviour is changed to always register them on demand. This patch provides a toggle that allows users to always register them. Without this toggle, in order to use conntrack for statistics collection, you need a dummy rule that refers to conntrack, eg. iptables -I INPUT -m state --state NEW This patch allows users to restore the original behaviour via modparam, ie. always register connection tracking, eg. modprobe nf_conntrack enable_hooks=1 Hence, no dummy rule is required. Reported-by: Laura Garcia Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_conntrack_standalone.c | 28 ++++++++++++++++++++++++---- 1 file changed, 24 insertions(+), 4 deletions(-) diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c index ddfca5f1784c..8928a4d0933e 100644 --- a/net/netfilter/nf_conntrack_standalone.c +++ b/net/netfilter/nf_conntrack_standalone.c @@ -24,6 +24,10 @@ #include #include +static bool enable_hooks __read_mostly; +MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks"); +module_param(enable_hooks, bool, 0000); + unsigned int nf_conntrack_net_id __read_mostly; #ifdef CONFIG_NF_CONNTRACK_PROCFS @@ -1075,6 +1079,15 @@ static void nf_conntrack_standalone_fini_sysctl(struct net *net) } #endif /* CONFIG_SYSCTL */ +static void nf_conntrack_fini_net(struct net *net) +{ + if (enable_hooks) + nf_ct_netns_put(net, NFPROTO_INET); + + nf_conntrack_standalone_fini_proc(net); + nf_conntrack_standalone_fini_sysctl(net); +} + static int nf_conntrack_pernet_init(struct net *net) { int ret; @@ -1093,8 +1106,16 @@ static int nf_conntrack_pernet_init(struct net *net) if (ret < 0) goto out_init_net; + if (enable_hooks) { + ret = nf_ct_netns_get(net, NFPROTO_INET); + if (ret < 0) + goto out_hooks; + } + return 0; +out_hooks: + nf_conntrack_fini_net(net); out_init_net: nf_conntrack_standalone_fini_proc(net); out_proc: @@ -1106,10 +1127,9 @@ static void nf_conntrack_pernet_exit(struct list_head *net_exit_list) { struct net *net; - list_for_each_entry(net, net_exit_list, exit_list) { - nf_conntrack_standalone_fini_sysctl(net); - nf_conntrack_standalone_fini_proc(net); - } + list_for_each_entry(net, net_exit_list, exit_list) + nf_conntrack_fini_net(net); + nf_conntrack_cleanup_net_list(net_exit_list); } -- 2.11.0