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=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no 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 67194C433E1 for ; Tue, 25 Aug 2020 22:52:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B62D2075F for ; Tue, 25 Aug 2020 22:52:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726757AbgHYWw7 (ORCPT ); Tue, 25 Aug 2020 18:52:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55208 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726466AbgHYWw6 (ORCPT ); Tue, 25 Aug 2020 18:52:58 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2494C061574 for ; Tue, 25 Aug 2020 15:52:58 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1kAhoE-00065H-EV; Wed, 26 Aug 2020 00:52:55 +0200 From: Florian Westphal To: Subject: [PATCH nf-next 0/4] netfilter: revisit conntrack statistics Date: Wed, 26 Aug 2020 00:52:41 +0200 Message-Id: <20200825225245.8072-1-fw@strlen.de> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netfilter-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org With recent addition of clash resolution the 'insert_failed' counter has become confusing. Depending on wheter clash resolution is successful, insert_failed increments or both insert_failed and drop increment. Example (conntrack -S): [..] insert_failed=15 drop=0 [..] search_restart=268 This means clash resolution worked and the insert_failed increase is harmeless. In case drop is non-zero, things become murky. It would be better to have a dedicated counter that only increments when clash resolution is successful. This series revisits conntrack statistics. Counters that do not indicate an error or reside in fast-paths are removed. With patched kernel and conntrack tool, output looks similar to this during a 'clash resolve' stress test: [..] insert_failed=9 drop=9 [..] search_restart=123 clash_resolve=3675 Florian Westphal (4): netfilter: conntrack: do not increment two error counters at same time netfilter: conntrack: remove ignore stats netfilter: conntrack: add clash resolution stat counter netfilter: conntrack: remove unneeded nf_ct_put include/linux/netfilter/nf_conntrack_common.h | 2 - include/uapi/linux/netfilter/nfnetlink_conntrack.h | 3 +- net/netfilter/nf_conntrack_core.c | 25 ++++++++------------- net/netfilter/nf_conntrack_netlink.c | 5 ++-- net/netfilter/nf_conntrack_standalone.c | 4 +-- 5 files changed, 18 insertions(+), 21 deletions(-)