From patchwork Thu Aug 5 18:57:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cong Wang X-Patchwork-Id: 493248 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 C8705C4338F for ; Thu, 5 Aug 2021 18:58:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AD99860F01 for ; Thu, 5 Aug 2021 18:58:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241878AbhHES6Y (ORCPT ); Thu, 5 Aug 2021 14:58:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241899AbhHES6R (ORCPT ); Thu, 5 Aug 2021 14:58:17 -0400 Received: from mail-oi1-x22b.google.com (mail-oi1-x22b.google.com [IPv6:2607:f8b0:4864:20::22b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46D91C0617A5 for ; Thu, 5 Aug 2021 11:58:03 -0700 (PDT) Received: by mail-oi1-x22b.google.com with SMTP id o185so8650036oih.13 for ; Thu, 05 Aug 2021 11:58:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=DUY4lKwppCJiRHA1jTheA/1frTIkO707O3tPxlgy9nw=; b=gINrXuu5PsHTcbrHVnaX2UnZB3cdCoxzlCivJ+OXOgD1K6SfPBm8Ucnjsb/u5RMVdo 71G+AwgrUrFrO/pSMF3CVn6BS7f/pccKH7tyfjgxpZEcIKJa+vG93JnsRfHZFKYsHDWV y5MaxINlLpICA9249ZDe4AFN5xQbZDHDKXMRNgXdZSYQ4C0nGm8PtJll6mOs4fJYDqOd 0mVKzvV4ubhDt+pkB/GFnru4vwp0LW0S3QZEOQE/qS/b+56uGqzn/BthQAc+tP89UcZW xqjGIJ2zgcrnwzxsU8rRA+xrWHb4M95Nb/ogavx47zz/19Aqo5o1wcR7/mjyb1lAR23C BXQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=DUY4lKwppCJiRHA1jTheA/1frTIkO707O3tPxlgy9nw=; b=m06DbKmvBZyhcvD+hJ3fTMdC25QG1Je/RgT+mdxxjBHi3FfQia1LhPGD5SlTgeZyxg yVED46mcscZXu1mn5fTntr8yYm9sY8/68sH05kRQ8g/phFQ+a7fZOYN2SKdD2l+nTOKf 7lhjngJe8b6fs4YRpsgGqngwlbn1cTqGPO3bErHgOnnWU22bCt0PkGRTjCNKHW2hq9go vT4fQVZBtCIzEKM+aDCwe19fq+uvlerACjNIkpJ1R+4J44u1lfY7hOWK8fw1GEGN/sT4 f67povuU9JdZSEB9cnTmD8RotIQPY/vY0hiFqCqYth62kCm56o0VWZrD0KnjUYubDT2t 6XeQ== X-Gm-Message-State: AOAM530Oe8lvHfQwT32akW+JGRVdb49Atj82ybPM2G3GzL82sRHefZV2 6s48GB5RLadwGB2VjqwNSKp/hCj/M6M= X-Google-Smtp-Source: ABdhPJyk2ZhWGYIeugzoshqsRhY8SItQic8sIZE+EQohEXyUdRMu0aKLttK4q0It+7bVOuLL/qmG+w== X-Received: by 2002:aca:4e94:: with SMTP id c142mr1869700oib.177.1628189882425; Thu, 05 Aug 2021 11:58:02 -0700 (PDT) Received: from unknown.attlocal.net ([2600:1700:65a0:ab60:c64b:2366:2e53:c024]) by smtp.gmail.com with ESMTPSA id r5sm358678otk.71.2021.08.05.11.58.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Aug 2021 11:58:02 -0700 (PDT) From: Cong Wang To: netdev@vger.kernel.org Cc: Qitao Xu , Cong Wang Subject: [Patch net-next 09/13] udp: introduce tracepoint trace_udp_rcv() Date: Thu, 5 Aug 2021 11:57:46 -0700 Message-Id: <20210805185750.4522-10-xiyou.wangcong@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210805185750.4522-1-xiyou.wangcong@gmail.com> References: <20210805185750.4522-1-xiyou.wangcong@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Qitao Xu Tracepoint trace_udp_rcv() is introduced to trace skb at the entrance of UDP layer on RX side. Reviewed-by: Cong Wang Signed-off-by: Qitao Xu --- include/trace/events/udp.h | 17 +++++++++++++++++ net/ipv4/udp.c | 8 +++++++- 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/include/trace/events/udp.h b/include/trace/events/udp.h index 6af4b402237a..5008bdd546e8 100644 --- a/include/trace/events/udp.h +++ b/include/trace/events/udp.h @@ -27,6 +27,23 @@ TRACE_EVENT(udp_fail_queue_rcv_skb, TP_printk("rc=%d port=%hu", __entry->rc, __entry->lport) ); +TRACE_EVENT(udp_rcv, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb), + + TP_STRUCT__entry( + __field(const void *, skbaddr) + ), + + TP_fast_assign( + __entry->skbaddr = skb; + ), + + TP_printk("skbaddr=%px", __entry->skbaddr) +); + TRACE_EVENT(udp_send_skb, TP_PROTO(const struct sock *sk, const struct sk_buff *skb), diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index daa618465a1d..4751a8f9acff 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -2617,7 +2617,13 @@ int udp_v4_early_demux(struct sk_buff *skb) int udp_rcv(struct sk_buff *skb) { - return __udp4_lib_rcv(skb, &udp_table, IPPROTO_UDP); + int ret; + + ret = __udp4_lib_rcv(skb, &udp_table, IPPROTO_UDP); + if (!ret) + trace_udp_rcv(skb); + return ret; + } void udp_destroy_sock(struct sock *sk)