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=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 4EE8EC43381 for ; Mon, 11 Mar 2019 22:50:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1BD432087C for ; Mon, 11 Mar 2019 22:50:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726617AbfCKWus (ORCPT ); Mon, 11 Mar 2019 18:50:48 -0400 Received: from mail.us.es ([193.147.175.20]:34610 "EHLO mail.us.es" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726473AbfCKWur (ORCPT ); Mon, 11 Mar 2019 18:50:47 -0400 Received: from antivirus1-rhel7.int (unknown [192.168.2.11]) by mail.us.es (Postfix) with ESMTP id 1C368209927 for ; Mon, 11 Mar 2019 23:50:45 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 07BC8F7323 for ; Mon, 11 Mar 2019 23:50:45 +0100 (CET) Received: by antivirus1-rhel7.int (Postfix, from userid 99) id 06EE9F7322; Mon, 11 Mar 2019 23:50:45 +0100 (CET) Received: from antivirus1-rhel7.int (localhost [127.0.0.1]) by antivirus1-rhel7.int (Postfix) with ESMTP id 367D4DA561; Mon, 11 Mar 2019 23:50:43 +0100 (CET) Received: from 192.168.1.97 (192.168.1.97) by antivirus1-rhel7.int (F-Secure/fsigk_smtp/550/antivirus1-rhel7.int); Mon, 11 Mar 2019 23:50:43 +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 01F734265A2F; Mon, 11 Mar 2019 23:50:42 +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 5/5] netfilter: nf_tables: return immediately on empty commit Date: Mon, 11 Mar 2019 23:50:35 +0100 Message-Id: <20190311225035.21250-6-pablo@netfilter.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190311225035.21250-1-pablo@netfilter.org> References: <20190311225035.21250-1-pablo@netfilter.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org From: Florian Westphal When running 'nft flush ruleset' while no rules exist, we will increment the generation counter and announce a new genid to userspace, yet nothing had changed in the first place. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_tables_api.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 9d8f51dfc593..513f93118604 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -6564,6 +6564,11 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb) struct nft_chain *chain; struct nft_table *table; + if (list_empty(&net->nft.commit_list)) { + mutex_unlock(&net->nft.commit_mutex); + return 0; + } + /* 0. Validate ruleset, otherwise roll back for error reporting. */ if (nf_tables_validate(net) < 0) return -EAGAIN; -- 2.11.0