From patchwork Mon Sep 13 12:29:41 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: 12488773 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 46B45C433F5 for ; Mon, 13 Sep 2021 12:30:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 312EE60FC0 for ; Mon, 13 Sep 2021 12:30:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240008AbhIMMb0 (ORCPT ); Mon, 13 Sep 2021 08:31:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240001AbhIMMbZ (ORCPT ); Mon, 13 Sep 2021 08:31:25 -0400 Received: from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com [IPv6:2a00:1450:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0341AC061574 for ; Mon, 13 Sep 2021 05:30:10 -0700 (PDT) Received: by mail-wr1-x42f.google.com with SMTP id q11so14403264wrr.9 for ; Mon, 13 Sep 2021 05:30:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Tb+yLbsxfo++BYsRLWBcxjT4Gb/rMmPEQmK9DUpx/KU=; b=ix2exfJlX4PwkPTZPXczzy8gu26qF6o/rjJTUvBLM3O4RpXFiuez3O2RESQVawDtn6 ek1Rq38aoSCoYYjG4DAxkjM7X/VcSp+FbZK2h+M9ByJNKxfzltY22++nOI0eKw4DLrFx cL6kqIvM8pzKh/3XBaqY11RKAJLTln4k+MVO6PHYum8llGmjVEL9eHTq7muVGSpKEPaO w4BHetzMMlLdzXs8LbNlWx2/DOgyi4nzmYNNfv2S71U6F5WaAt/kohQFD2lzNRM1qy2/ Rcj2sf6Ds9lHLdlR05Ni8tPD/CeVGA7Wb1cZULWrd70qUX0szR/RZrRmxxrcMZh0LG+I v4zA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Tb+yLbsxfo++BYsRLWBcxjT4Gb/rMmPEQmK9DUpx/KU=; b=IJA8Blr4oxIR8DYEB8GYomWSJsSjpqleKM3EWeqHLwZOSs1Ku+2sIpJoTTFMK/J1Tn v0v4RC0taI/D1N3HtLFbo3W8jKmE6eVo6dB2PTxU15Dt0wtFcoby91vASazZ4pJ6JTUL XT9dVkL10FAF7qqJC9gj8t8Lr0g57XI5UJ5HgeKEuhxS4rulmhSjkizy6sIojgSpedfz cUhYyq3EKMneZIh18zeA4DEwBNP+s8/84xEvQZQQuSyKCAH+O/BAIo7ldTYrPN2HKSYl gK9MNBfbdyL00ZAoCXFNWJmvQYiskqhGn27WYWU8rhtRttY/s6AZKiOMBa3v4eA1vJs+ KnCQ== X-Gm-Message-State: AOAM530lKJY27D9N8fxcYn4FYzqN6psyR2H1ItcZhqWKBXeon8CzvXRt fCzHnor+TAeaugLqeBRVptizX1U1wj4= X-Google-Smtp-Source: ABdhPJyyHFs4Xn3xJ7ItNLtu70fIeyRA8rwYrCO2At5becNDJwn8Hn7X5wzV+obMU9AXglBmOA/CgQ== X-Received: by 2002:a05:6000:374:: with SMTP id f20mr12308818wrf.129.1631536208605; Mon, 13 Sep 2021 05:30:08 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id z5sm6842030wmf.33.2021.09.13.05.30.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Sep 2021 05:30:08 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v2 19/25] trace-cmd library: Handle the extended DONE option Date: Mon, 13 Sep 2021 15:29:41 +0300 Message-Id: <20210913122947.3673239-20-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210913122947.3673239-1-tz.stoyanov@gmail.com> References: <20210913122947.3673239-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org In trace file version 7 the DONE option is extended to store the offset in the file to the next options section. This way a list of options sections can be stored in the file. Added logic to recursively read all option sections from the file. Signed-off-by: Tzvetomir Stoyanov (VMware) --- lib/trace-cmd/include/trace-cmd-local.h | 1 + lib/trace-cmd/trace-input.c | 42 +++++++++++++++++++++++-- lib/trace-cmd/trace-output.c | 2 +- 3 files changed, 41 insertions(+), 4 deletions(-) diff --git a/lib/trace-cmd/include/trace-cmd-local.h b/lib/trace-cmd/include/trace-cmd-local.h index 405b7dae..b29236dc 100644 --- a/lib/trace-cmd/include/trace-cmd-local.h +++ b/lib/trace-cmd/include/trace-cmd-local.h @@ -49,5 +49,6 @@ struct cpu_data_source { int out_write_cpu_data(struct tracecmd_output *handle, int cpus, struct cpu_data_source *data, const char *buff_name); off64_t msg_lseek(struct tracecmd_msg_handle *msg_handle, off_t offset, int whence); +unsigned long long get_last_option_offset(struct tracecmd_input *handle); #endif /* _TRACE_CMD_LOCAL_H */ diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c index f90d003d..009d272f 100644 --- a/lib/trace-cmd/trace-input.c +++ b/lib/trace-cmd/trace-input.c @@ -175,6 +175,7 @@ struct tracecmd_input { struct file_section *sections; bool options_init; unsigned long long options_start; + unsigned long long options_last_offset; size_t total_file_size; /* For custom profilers. */ @@ -2871,6 +2872,30 @@ tracecmd_search_task_map(struct tracecmd_input *handle, return lib; } +__hidden unsigned long long get_last_option_offset(struct tracecmd_input *handle) +{ + return handle->options_last_offset; +} + +static int handle_option_done(struct tracecmd_input *handle, char *buf, int size) +{ + unsigned long long offset; + + if (size < 8) + return -1; + offset = lseek64(handle->fd, 0, SEEK_CUR); + if (offset >= size) + handle->options_last_offset = offset - size; + offset = tep_read_number(handle->pevent, buf, 8); + if (!offset) + return 0; + + if (lseek64(handle->fd, offset, SEEK_SET) == (off_t)-1) + return -1; + + return handle_options(handle); +} + static inline int save_read_number(struct tep_handle *tep, char *data, int *data_size, int *read_pos, int bytes, unsigned long long *num) { @@ -2971,19 +2996,27 @@ static int handle_options(struct tracecmd_input *handle) long long offset; unsigned short option; unsigned int size; + unsigned short id, flags; char *cpustats = NULL; struct hook_list *hook; char *buf; int cpus; int ret; - handle->options_start = lseek64(handle->fd, 0, SEEK_CUR); + if (!HAS_SECTIONS(handle)) { + handle->options_start = lseek64(handle->fd, 0, SEEK_CUR); + } else { + if (read_section_header(handle, &id, &flags, NULL, NULL)) + return -1; + if (id != TRACECMD_OPTION_DONE) + return -1; + } for (;;) { if (read2(handle, &option)) return -1; - if (option == TRACECMD_OPTION_DONE) + if (!HAS_SECTIONS(handle) && option == TRACECMD_OPTION_DONE) break; /* next 4 bytes is the size of the option */ @@ -3120,7 +3153,10 @@ static int handle_options(struct tracecmd_input *handle) section_add_or_update(handle, option, -1, tep_read_number(handle->pevent, buf, 8), 0); break; - + case TRACECMD_OPTION_DONE: + ret = handle_option_done(handle, buf, size); + free(buf); + return ret; default: tracecmd_warning("unknown option %d", option); break; diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c index 810b7265..4e2c132d 100644 --- a/lib/trace-cmd/trace-output.c +++ b/lib/trace-cmd/trace-output.c @@ -2150,7 +2150,7 @@ 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_in_file_version(ihandle); - handle->options_start = tracecmd_get_options_offset(ihandle); + handle->options_start = get_last_option_offset(ihandle); list_head_init(&handle->options); list_head_init(&handle->buffers);