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=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 DEE37C433E3 for ; Tue, 28 Jul 2020 01:35:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B376D20672 for ; Tue, 28 Jul 2020 01:35:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="aW+wI3Od" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727012AbgG1BfZ (ORCPT ); Mon, 27 Jul 2020 21:35:25 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:26549 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726357AbgG1BfZ (ORCPT ); Mon, 27 Jul 2020 21:35:25 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1595900124; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=J+GkYlJeue+xhm0JgHaodonblQjXsPYjEk8/Vc2LCdw=; b=aW+wI3OddV0iwgwxHBJt0F+dtI8jWXJHm8lZyz0Yb9mV1vrWhpmBG9v+S3LE9E9NXbsWPiai uUSRdy5r2TXNvmXhUeCOoI6tQ/Fq4mGkYgivLU/IKIkTg7XyOoCY1Aw1872MRPZOoohZTsfK /rbjO5Gd8ysebzAswa6xSIhcbVo= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n10.prod.us-east-1.postgun.com with SMTP id 5f1f80a91db0b33fd8e926b2 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 28 Jul 2020 01:34:33 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 6025AC433C6; Tue, 28 Jul 2020 01:34:32 +0000 (UTC) Received: from tingweiz-gv.qualcomm.com (unknown [180.166.53.21]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: tingwei) by smtp.codeaurora.org (Postfix) with ESMTPSA id 66C71C433C9; Tue, 28 Jul 2020 01:34:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 66C71C433C9 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=tingwei@codeaurora.org From: Tingwei Zhang To: Steven Rostedt , Ingo Molnar Cc: Tingwei Zhang , tsoni@codeaurora.org, Sai Prakash Ranjan , Mao Jinlong , linux-kernel@vger.kernel.org Subject: [PATCH v3 4/6] tracing: add trace_export support for trace_marker Date: Tue, 28 Jul 2020 09:33:57 +0800 Message-Id: <20200728013359.2326-5-tingwei@codeaurora.org> X-Mailer: git-send-email 2.20.0 In-Reply-To: <20200728013359.2326-1-tingwei@codeaurora.org> References: <20200728013359.2326-1-tingwei@codeaurora.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the support to route trace_marker buffer to other destination via trace_export. Signed-off-by: Tingwei Zhang Reviewed-by: Steven Rostedt (VMware) --- include/linux/trace.h | 1 + kernel/trace/trace.c | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/include/linux/trace.h b/include/linux/trace.h index 5a01eeffb254..80b7df68bc0f 100644 --- a/include/linux/trace.h +++ b/include/linux/trace.h @@ -6,6 +6,7 @@ #define TRACE_EXPORT_FUNCTION BIT(0) #define TRACE_EXPORT_EVENT BIT(1) +#define TRACE_EXPORT_MARKER BIT(2) /* * The trace export - an export of Ftrace output. The trace_export diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 2f9302a8b322..67993abda394 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -271,6 +271,7 @@ static struct trace_export __rcu *ftrace_exports_list __read_mostly; static DEFINE_STATIC_KEY_FALSE(trace_function_exports_enabled); static DEFINE_STATIC_KEY_FALSE(trace_event_exports_enabled); +static DEFINE_STATIC_KEY_FALSE(trace_marker_exports_enabled); static inline void ftrace_exports_enable(struct trace_export *export) { @@ -279,6 +280,9 @@ static inline void ftrace_exports_enable(struct trace_export *export) if (export->flags & TRACE_EXPORT_EVENT) static_branch_inc(&trace_event_exports_enabled); + + if (export->flags & TRACE_EXPORT_MARKER) + static_branch_inc(&trace_marker_exports_enabled); } static inline void ftrace_exports_disable(struct trace_export *export) @@ -288,6 +292,9 @@ static inline void ftrace_exports_disable(struct trace_export *export) if (export->flags & TRACE_EXPORT_EVENT) static_branch_dec(&trace_event_exports_enabled); + + if (export->flags & TRACE_EXPORT_MARKER) + static_branch_dec(&trace_marker_exports_enabled); } static void ftrace_exports(struct ring_buffer_event *event, int flag) @@ -6648,6 +6655,8 @@ tracing_mark_write(struct file *filp, const char __user *ubuf, } else entry->buf[cnt] = '\0'; + if (static_branch_unlikely(&trace_marker_exports_enabled)) + ftrace_exports(event, TRACE_EXPORT_MARKER); __buffer_unlock_commit(buffer, event); if (tt) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project