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=-14.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 41744C6379F for ; Mon, 23 Nov 2020 23:08:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 150F3206B6 for ; Mon, 23 Nov 2020 23:08:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388403AbgKWXIj convert rfc822-to-8bit (ORCPT ); Mon, 23 Nov 2020 18:08:39 -0500 Received: from us-smtp-delivery-44.mimecast.com ([205.139.111.44]:33613 "EHLO us-smtp-delivery-44.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388267AbgKWXGo (ORCPT ); Mon, 23 Nov 2020 18:06:44 -0500 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-184-HeU2SR4oMQW01Wh3ODaRpA-1; Mon, 23 Nov 2020 18:06:36 -0500 X-MC-Unique: HeU2SR4oMQW01Wh3ODaRpA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id CAAF1100A241; Mon, 23 Nov 2020 23:06:34 +0000 (UTC) Received: from krava.redhat.com (unknown [10.40.195.242]) by smtp.corp.redhat.com (Postfix) with ESMTP id D62AB5D9CA; Mon, 23 Nov 2020 23:06:31 +0000 (UTC) From: Jiri Olsa To: Arnaldo Carvalho de Melo Cc: Ian Rogers , lkml , Peter Zijlstra , Ingo Molnar , Mark Rutland , Namhyung Kim , Alexander Shishkin , Michael Petlan , Song Liu , Stephane Eranian , Alexey Budankov , Andi Kleen , Adrian Hunter Subject: [PATCH 20/25] perf tools: Add is_perf_data function Date: Tue, 24 Nov 2020 00:05:07 +0100 Message-Id: <20201123230512.2097312-21-jolsa@kernel.org> In-Reply-To: <20201123230512.2097312-1-jolsa@kernel.org> References: <20201123230512.2097312-1-jolsa@kernel.org> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jolsa@kernel.org X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: kernel.org Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset=WINDOWS-1252 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding is_perf_data function that returns true if the given path is perf data file. It will be used in following patches. Acked-by: Ian Rogers Signed-off-by: Jiri Olsa --- tools/perf/util/data.c | 19 +++++++++++++++++++ tools/perf/util/data.h | 1 + 2 files changed, 20 insertions(+) diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index 05bbcb663c41..f29af4fc3d09 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -492,3 +492,22 @@ char *perf_data__kallsyms_name(struct perf_data *data) return kallsyms_name; } + +bool is_perf_data(const char *path) +{ + bool ret = false; + FILE *file; + u64 magic; + + file = fopen(path, "r"); + if (!file) + return false; + + if (fread(&magic, 1, 8, file) < 8) + goto out; + + ret = is_perf_magic(magic); +out: + fclose(file); + return ret; +} diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h index c563fcbb0288..62a3e66fbee8 100644 --- a/tools/perf/util/data.h +++ b/tools/perf/util/data.h @@ -98,4 +98,5 @@ int perf_data__update_dir(struct perf_data *data); unsigned long perf_data__size(struct perf_data *data); int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz); char *perf_data__kallsyms_name(struct perf_data *data); +bool is_perf_data(const char *path); #endif /* __PERF_DATA_H */ -- 2.26.2