From patchwork Thu May 20 03:19:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Tzvetomir Stoyanov (VMware)" X-Patchwork-Id: 12268867 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,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 1F969C433ED for ; Thu, 20 May 2021 03:20:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 04DD461186 for ; Thu, 20 May 2021 03:20:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230298AbhETDVr (ORCPT ); Wed, 19 May 2021 23:21:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46534 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230267AbhETDVr (ORCPT ); Wed, 19 May 2021 23:21:47 -0400 Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B165C06175F for ; Wed, 19 May 2021 20:20:25 -0700 (PDT) Received: by mail-ej1-x629.google.com with SMTP id lz27so22915136ejb.11 for ; Wed, 19 May 2021 20:20:25 -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=gMo8KC9sNILqewOKWuCmRF3qHF+EaLVS8tEPPLTTOtM=; b=YGgP7yLtM6N2qkK66XPuL2e7jzAjL+UNqImN6112FJP2giotWztPSiHmfJF4QTU09a nZAWCqorR5ov6JKbiPXp7gQiDdS1Vb43zFdaldYT6XEL7GG55m6+SuW0BOPoZ7vMDmtj plx4vI7Sms4Vk3Tl9KV3IcKsjd06lljVuTMKawcBzMKh0Sl6Vmvoia7CQH1ynR1iyHXi mm4c7evEA8tA4wQjXveLF91RQ1aWesn0vV1/R5riEFDk1O1tD0Rmb2f39Fg9orsXyWuY O+ry2B79AncpHYDTwaAWYK6UKWrH29lMqNGCtca0ce862Ate6FlsGOCoDSnrAN1nfcfG Yofg== 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=gMo8KC9sNILqewOKWuCmRF3qHF+EaLVS8tEPPLTTOtM=; b=ju/kbGSuGzIR0oIrLz7+Ou3LUmgR71KsQZBsnahnAseU/kHTUiqAG691nTJMTnJlab sgT5jWGo+Ux2T695qUuJsFcSJrnEJ+gYDZu/cjA436yJV9wX0cHbvAhrjoJuILce8/eR iwWQ19yTdE+fH5Z4a5/jakd4cOYBi8vFcNKSmjPF5BvLo+4E8ueJTOXorP1YEJ7m/acE lhCLu65E7QX6pZjvX/ottq/4ZCHEcQjsavFVc448ZqJNpVads4WDspCtto+hEcq1pDek +WLAnVEhsq4M6xgDwBBK0zvZlg+nmAAG8E78WftbeLrZZ8V91e+62+ned+EOs+Y/sx/y VwRw== X-Gm-Message-State: AOAM530BXRto1WDcifw0kb1np5Us9eP2znUDvu/0ojElX9fAaitBMeYr c9Y481fpDknXKvtJD5tXBBg= X-Google-Smtp-Source: ABdhPJyyEdxDtFkX9kJGZXDfF/mUy+NX2/kWUDLONekfdf2HQKMJh+bE7iEbXrmhm0yXDIXtJ1bd2Q== X-Received: by 2002:a17:906:458:: with SMTP id e24mr2497270eja.199.1621480824206; Wed, 19 May 2021 20:20:24 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id f5sm763280eds.55.2021.05.19.20.20.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 May 2021 20:20:23 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v4 20/29] trace-cmd library: Track the offset in the option section in the trace file Date: Thu, 20 May 2021 06:19:50 +0300 Message-Id: <20210520031959.346165-21-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520031959.346165-1-tz.stoyanov@gmail.com> References: <20210520031959.346165-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org When reading / writing trace file, store the offset of the option section in the file. A new internal API is added, to get the offset of the option section from an input file handler: tracecmd_get_options_offset() These changes are needed for compression of the option section from the trace file. Signed-off-by: Tzvetomir Stoyanov (VMware) --- lib/trace-cmd/include/private/trace-cmd-private.h | 1 + lib/trace-cmd/trace-input.c | 11 +++++++++++ lib/trace-cmd/trace-output.c | 2 ++ 3 files changed, 14 insertions(+) diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h index d67ec86e..2c28ee04 100644 --- a/lib/trace-cmd/include/private/trace-cmd-private.h +++ b/lib/trace-cmd/include/private/trace-cmd-private.h @@ -239,6 +239,7 @@ tracecmd_get_cursor(struct tracecmd_input *handle, int cpu); unsigned long tracecmd_get_file_version(struct tracecmd_input *handle); int tracecmd_get_file_compress_proto(struct tracecmd_input *handle, const char **name, const char **version); +size_t tracecmd_get_options_offset(struct tracecmd_input *handle); int tracecmd_ftrace_overrides(struct tracecmd_input *handle, struct tracecmd_ftrace *finfo); bool tracecmd_get_use_trace_clock(struct tracecmd_input *handle); diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index ec83ab09..ee3c23f2 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -157,6 +157,7 @@ struct tracecmd_input { size_t header_files_start; size_t ftrace_files_start; size_t event_files_start; + size_t options_start; size_t total_file_size; /* For custom profilers. */ @@ -2759,6 +2760,7 @@ static int handle_options(struct tracecmd_input *handle) /* By default, use usecs, unless told otherwise */ handle->flags |= TRACECMD_FL_IN_USECS; + handle->options_start = lseek64(handle->fd, 0, SEEK_CUR); for (;;) { if (do_read_check(handle, &option, 2)) @@ -4213,6 +4215,15 @@ bool tracecmd_get_use_trace_clock(struct tracecmd_input *handle) return handle->use_trace_clock; } +/** + * tracecmd_get_options_offset - get offset of the options sections in the file + * @handle: input handle for the trace.dat file + */ +size_t tracecmd_get_options_offset(struct tracecmd_input *handle) +{ + return handle->options_start; +} + /** * tracecmd_get_show_data_func - return the show data func * @handle: input handle for the trace.dat file diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c index 580882eb..fd899c45 100644 --- a/lib/trace-cmd/trace-output.c +++ b/lib/trace-cmd/trace-output.c @@ -66,6 +66,7 @@ struct tracecmd_output { bool quiet; unsigned long file_state; unsigned long file_version; + size_t options_start; bool do_compress; struct tracecmd_compression *compress; @@ -1854,6 +1855,7 @@ struct tracecmd_output *tracecmd_get_output_handle_fd(int fd) tep_ref(handle->pevent); handle->page_size = tracecmd_page_size(ihandle); handle->file_version = tracecmd_get_file_version(ihandle); + handle->options_start = tracecmd_get_options_offset(ihandle); list_head_init(&handle->options); list_head_init(&handle->buffers);