From patchwork Mon Dec 5 17:15:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pedro Tammela X-Patchwork-Id: 13064833 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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C46EFC4332F for ; Mon, 5 Dec 2022 17:16:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231693AbiLERQN (ORCPT ); Mon, 5 Dec 2022 12:16:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230037AbiLERQK (ORCPT ); Mon, 5 Dec 2022 12:16:10 -0500 Received: from mail-oa1-x2b.google.com (mail-oa1-x2b.google.com [IPv6:2001:4860:4864:20::2b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 87D091C119 for ; Mon, 5 Dec 2022 09:16:04 -0800 (PST) Received: by mail-oa1-x2b.google.com with SMTP id 586e51a60fabf-1441d7d40c6so14197238fac.8 for ; Mon, 05 Dec 2022 09:16:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mojatatu-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ZluMKMeN6IsWoVI927FrZKDiSQG5znfnFnu4iEnYPIM=; b=bKvY+sDGl+36dEXtusxYv+EoyUwpEkvmBR9NhfM+j+47+/VTrHtIiHtGDBepKDqFMn cddVQKHdkkdQnALEneKLQKilAikigKrGvp922tdXWt/u166oApBmNHvQOaKU6WqIgxfl s6sTdRbzxIb7xHrWz9WPvlYRifogHpluDTZQBOhM7qWrdSbpyuVzgqN4SfOZ+W4Ceo9K 7d/G7o9A4EjQqQPJHsKYRwGvi00xwsg55ehaGyrdrcWCSICZPd51kgNETHFaHkKUD8sE yJq5lFnjj0YMD0W0Fgt0+mhxgb5ufmoGNLtDpwzZczHEgL0T8EJRzex9nfa0MicLC9zv D44A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ZluMKMeN6IsWoVI927FrZKDiSQG5znfnFnu4iEnYPIM=; b=EuUzbqDkqFMTt5fOQ/R3Fi2DkPJnvun7Ots7baQCQlI15Sgz1NPiHJWR6A6hOoPxj4 e/lnKruKqnfKh81gpsI+4zA2f2NlXHhOdAY9rPsM4KUrGcoKVbpevCV38juqTDlJGyXG Gu9gtV0c9oYmA+y2m1RoeVTnw441Nyi/mj2gzHrbMWbqfqI4tvQiw83uhLivahwxbwvk 6iNC7GUFIGKbupPn4WWSi80SRf4BkvtDR+zzYGxMuJf6A/sESYQ6bBp//m1+co5rT02u IU5GnGunxPlAHZmESQ+MYefZ1mFKPdaP18ZJgFNl6q92Je62wuHBHikF/kVXWhvfgUrW 1Kpg== X-Gm-Message-State: ANoB5pnEO++u5D5EY8IIrXLInPWiL/Ui+FO92t/UBl6aOQOhUwwTwuGt GtQaRdoirGyIpsg1IkuBUR+p0wZ1Xe+jabB5 X-Google-Smtp-Source: AA0mqf55N41gEr4KUFg4cbD8w8xkGdp4AgWdvljArbXCME88bdT/U7Rsps8x6L9igVu7dIfV1eoeXw== X-Received: by 2002:a05:6870:d784:b0:13a:ec33:4ed with SMTP id bd4-20020a056870d78400b0013aec3304edmr39689919oab.56.1670260563590; Mon, 05 Dec 2022 09:16:03 -0800 (PST) Received: from localhost.localdomain ([2804:14d:5c5e:4698:56de:4ea4:df4e:f7cc]) by smtp.gmail.com with ESMTPSA id l17-20020a056871069100b0013d6d924995sm9429225oao.19.2022.12.05.09.16.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Dec 2022 09:16:03 -0800 (PST) From: Pedro Tammela To: netdev@vger.kernel.org Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us, kuniyu@amazon.com, Pedro Tammela , Victor Nogueira Subject: [PATCH net-next v3 2/4] net/sched: add retpoline wrapper for tc Date: Mon, 5 Dec 2022 14:15:18 -0300 Message-Id: <20221205171520.1731689-3-pctammela@mojatatu.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221205171520.1731689-1-pctammela@mojatatu.com> References: <20221205171520.1731689-1-pctammela@mojatatu.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org On kernels compiled with CONFIG_RETPOLINE and CONFIG_NET_TC_INDIRECT_WRAPPER, optimize actions and filters that are compiled as built-ins into a direct call. The calls are ordered according to relevance. Testing data shows that the pps difference between first and last is between 0.5%-1.0%. On subsequent patches we expose the classifiers and actions functions and wire up the wrapper into tc. Signed-off-by: Pedro Tammela Reviewed-by: Jamal Hadi Salim Reviewed-by: Victor Nogueira --- include/net/tc_wrapper.h | 226 +++++++++++++++++++++++++++++++++++++++ net/sched/Kconfig | 13 +++ 2 files changed, 239 insertions(+) create mode 100644 include/net/tc_wrapper.h diff --git a/include/net/tc_wrapper.h b/include/net/tc_wrapper.h new file mode 100644 index 000000000000..3bdebbfdf9d2 --- /dev/null +++ b/include/net/tc_wrapper.h @@ -0,0 +1,226 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __NET_TC_WRAPPER_H +#define __NET_TC_WRAPPER_H + +#include +#include + +#if IS_ENABLED(CONFIG_NET_TC_INDIRECT_WRAPPER) + +#define TC_INDIRECT_SCOPE + +/* TC Actions */ +#ifdef CONFIG_NET_CLS_ACT + +#define TC_INDIRECT_ACTION_DECLARE(fname) \ + INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \ + const struct tc_action *a, \ + struct tcf_result *res)) + +TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act); +TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act); +TC_INDIRECT_ACTION_DECLARE(tcf_csum_act); +TC_INDIRECT_ACTION_DECLARE(tcf_ct_act); +TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act); +TC_INDIRECT_ACTION_DECLARE(tcf_gact_act); +TC_INDIRECT_ACTION_DECLARE(tcf_gate_act); +TC_INDIRECT_ACTION_DECLARE(tcf_ife_act); +TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act); +TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act); +TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act); +TC_INDIRECT_ACTION_DECLARE(tcf_nat_act); +TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act); +TC_INDIRECT_ACTION_DECLARE(tcf_police_act); +TC_INDIRECT_ACTION_DECLARE(tcf_sample_act); +TC_INDIRECT_ACTION_DECLARE(tcf_simp_act); +TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act); +TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act); +TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act); +TC_INDIRECT_ACTION_DECLARE(tunnel_key_act); + +static inline int tc_act(struct sk_buff *skb, const struct tc_action *a, + struct tcf_result *res) +{ +#if IS_BUILTIN(CONFIG_NET_ACT_GACT) + if (a->ops->act == tcf_gact_act) + return tcf_gact_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_MIRRED) + if (a->ops->act == tcf_mirred_act) + return tcf_mirred_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_PEDIT) + if (a->ops->act == tcf_pedit_act) + return tcf_pedit_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT) + if (a->ops->act == tcf_skbedit_act) + return tcf_skbedit_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_SKBMOD) + if (a->ops->act == tcf_skbmod_act) + return tcf_skbmod_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_POLICE) + if (a->ops->act == tcf_police_act) + return tcf_police_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_BPF) + if (a->ops->act == tcf_bpf_act) + return tcf_bpf_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_CONNMARK) + if (a->ops->act == tcf_connmark_act) + return tcf_connmark_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_CSUM) + if (a->ops->act == tcf_csum_act) + return tcf_csum_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_CT) + if (a->ops->act == tcf_ct_act) + return tcf_ct_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_CTINFO) + if (a->ops->act == tcf_ctinfo_act) + return tcf_ctinfo_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_GATE) + if (a->ops->act == tcf_gate_act) + return tcf_gate_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_MPLS) + if (a->ops->act == tcf_mpls_act) + return tcf_mpls_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_NAT) + if (a->ops->act == tcf_nat_act) + return tcf_nat_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY) + if (a->ops->act == tunnel_key_act) + return tunnel_key_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_VLAN) + if (a->ops->act == tcf_vlan_act) + return tcf_vlan_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_IFE) + if (a->ops->act == tcf_ife_act) + return tcf_ife_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_IPT) + if (a->ops->act == tcf_ipt_act) + return tcf_ipt_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_SIMP) + if (a->ops->act == tcf_simp_act) + return tcf_simp_act(skb, a, res); +#endif +#if IS_BUILTIN(CONFIG_NET_ACT_SAMPLE) + if (a->ops->act == tcf_sample_act) + return tcf_sample_act(skb, a, res); +#endif + + return a->ops->act(skb, a, res); +} + +#endif /* CONFIG_NET_CLS_ACT */ + +/* TC Filters */ +#ifdef CONFIG_NET_CLS + +#define TC_INDIRECT_FILTER_DECLARE(fname) \ + INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \ + const struct tcf_proto *tp, \ + struct tcf_result *res)) + +TC_INDIRECT_FILTER_DECLARE(basic_classify); +TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify); +TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify); +TC_INDIRECT_FILTER_DECLARE(fl_classify); +TC_INDIRECT_FILTER_DECLARE(flow_classify); +TC_INDIRECT_FILTER_DECLARE(fw_classify); +TC_INDIRECT_FILTER_DECLARE(mall_classify); +TC_INDIRECT_FILTER_DECLARE(route4_classify); +TC_INDIRECT_FILTER_DECLARE(rsvp_classify); +TC_INDIRECT_FILTER_DECLARE(rsvp6_classify); +TC_INDIRECT_FILTER_DECLARE(tcindex_classify); +TC_INDIRECT_FILTER_DECLARE(u32_classify); + +static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp, + struct tcf_result *res) +{ +#if IS_BUILTIN(CONFIG_NET_CLS_BPF) + if (tp->classify == cls_bpf_classify) + return cls_bpf_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_U32) + if (tp->classify == u32_classify) + return u32_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_FLOWER) + if (tp->classify == fl_classify) + return fl_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_FW) + if (tp->classify == fw_classify) + return fw_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_MATCHALL) + if (tp->classify == mall_classify) + return mall_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_BASIC) + if (tp->classify == basic_classify) + return basic_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP) + if (tp->classify == cls_cgroup_classify) + return cls_cgroup_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_FLOW) + if (tp->classify == flow_classify) + return flow_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_ROUTE4) + if (tp->classify == route4_classify) + return route4_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_RSVP) + if (tp->classify == rsvp_classify) + return rsvp_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_RSVP6) + if (tp->classify == rsvp6_classify) + return rsvp6_classify(skb, tp, res); +#endif +#if IS_BUILTIN(CONFIG_NET_CLS_TCINDEX) + if (tp->classify == tcindex_classify) + return tcindex_classify(skb, tp, res); +#endif + + return tp->classify(skb, tp, res); +} + +#endif /* CONFIG_NET_CLS */ + +#else + +#define TC_INDIRECT_SCOPE static + +static inline int tc_act(struct sk_buff *skb, const struct tc_action *a, + struct tcf_result *res) +{ + return a->ops->act(skb, a, res); +} + +static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp, + struct tcf_result *res) +{ + return tp->classify(skb, tp, res); +} + +#endif + +#endif /* __NET_TC_WRAPPER_H */ diff --git a/net/sched/Kconfig b/net/sched/Kconfig index 1e8ab4749c6c..9bc055f8013e 100644 --- a/net/sched/Kconfig +++ b/net/sched/Kconfig @@ -1021,6 +1021,19 @@ config NET_TC_SKB_EXT Say N here if you won't be using tc<->ovs offload or tc chains offload. +config NET_TC_INDIRECT_WRAPPER + bool "TC indirect call wrapper" + depends on NET_SCHED + depends on RETPOLINE + + help + Say Y here to skip indirect calls in the TC datapath for known + builtin classifiers/actions under CONFIG_RETPOLINE kernels. + + TC may run slower on CPUs with hardware based mitigations. + + If unsure, say N. + endif # NET_SCHED config NET_SCH_FIFO