From patchwork Fri Sep 10 13:50:42 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: 12485201 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 8B825C433EF for ; Fri, 10 Sep 2021 13:51:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6A3DB611C9 for ; Fri, 10 Sep 2021 13:51:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233723AbhIJNwV (ORCPT ); Fri, 10 Sep 2021 09:52:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233588AbhIJNwV (ORCPT ); Fri, 10 Sep 2021 09:52:21 -0400 Received: from mail-ed1-x52b.google.com (mail-ed1-x52b.google.com [IPv6:2a00:1450:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D4EAC061574 for ; Fri, 10 Sep 2021 06:51:10 -0700 (PDT) Received: by mail-ed1-x52b.google.com with SMTP id r7so2602200edd.6 for ; Fri, 10 Sep 2021 06:51:10 -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=ooLR2m6QspyqnAPoioXKZOkpEV5/QvYIOSYWiu5Xp0s=; b=NjC9WtJ4QX3RO+C6kUUw2f87ottTOPaX/9wUNOIORpf48dMznvTAjasMUich9SkEYc 93wSkQrwiAeQy1d5Om8yD1iLOP7C6A7DbhrQ495wM60OK9S+BSUJgt21vyBKmHADpqaO ZH7PHevL+Dn9AOc0E+EfwQKbJ/q3NtXrwExFfZSa1+wGT+jqAYijQEkWmVlqLeMTdVGp GC1BDl2OikrERnNmfDDPTFQuB0pv4q1m3ce5g7uLw0Oyb9mFo5yJVH/P9oSmszx/34VW GWNztqKYtoKMrPmM533Tpo6gOKCSZQRnWAL5Mu5dWU0+Ab/irhifktMRTAxhiI15WWkA JXzw== 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=ooLR2m6QspyqnAPoioXKZOkpEV5/QvYIOSYWiu5Xp0s=; b=HpeaG8eoKL0sNxqbWoRQWKcujC1O7W18Gw1B2Jp85DdPYxLIg2dXwGrZUBnyNNqRth 8L08fvLKUMBiAFphwxhzIl/vrlIor/TuffpIL97NLOPoNdEaL3gIwqXfkYf03T68eQ1V udeMs1K4jRbwMu5YRkj8ngLhWLqREC54jkluZjqKBBEYVPiGOXUZX5TrkjJDu8yT4k6v txbhKLzXMa7b6TMjm3senDXRR0GgLidIO1jXU3KwHyHI4fsgHyYCnJjE1xkbN8XV37kG /cerFWnYc9GApnvesb1Y8R97O8PIIP47Iq/W5vXuv+gjnCS5yCwSlV+2Q+dcOIB+XGsO obpw== X-Gm-Message-State: AOAM533wE+m/lpIc45uquFy50bTt1GrudMS1vvBcpd2msWGUN94u0XEZ tU/NkRiXqB857hpgjDLU3ByYmrL5fjI= X-Google-Smtp-Source: ABdhPJxtSSZ7qYa4iDOzSZZdBhGizHcBSnpsZBo60rooJJLwYngSAWvuElYJ4g4QjccYp/rl7UKQgg== X-Received: by 2002:a50:d0d1:: with SMTP id g17mr9343484edf.96.1631281868718; Fri, 10 Sep 2021 06:51:08 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id w13sm2484683ejc.100.2021.09.10.06.51.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Sep 2021 06:51:08 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH 06/25] trace-cmd library: Add multiple options sections in trace file version 7 Date: Fri, 10 Sep 2021 16:50:42 +0300 Message-Id: <20210910135101.2865226-7-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210910135101.2865226-1-tz.stoyanov@gmail.com> References: <20210910135101.2865226-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Introduced chain of options sections in trace file version 7. Extended the "DONE" option to hold the offset into the file to the next options section. Format of trace file version 7 is extended with a new mandatory field after the compression algorithm header: <8 bytes>, unsigned long long integer - offset into the trace file where the first options section is located. This allows to place this section anywhere in the file. As all other sections have corresponding options, describing their offsets into the trace file, this change makes the structure of trace file version 7 flexible. Signed-off-by: Tzvetomir Stoyanov (VMware) --- lib/trace-cmd/trace-output.c | 101 ++++++++++++++++++++++++++++++++--- 1 file changed, 94 insertions(+), 7 deletions(-) diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c index ca246fa8..13411804 100644 --- a/lib/trace-cmd/trace-output.c +++ b/lib/trace-cmd/trace-output.c @@ -63,7 +63,7 @@ struct tracecmd_output { bool quiet; unsigned long file_state; unsigned long file_version; - size_t options_start; + tsize_t options_start; bool big_endian; struct list_head options; @@ -1220,6 +1220,7 @@ int tracecmd_output_set_version(struct tracecmd_output *handler, int file_versio */ int tracecmd_output_write_init(struct tracecmd_output *handler) { + unsigned long long offset; char buf[BUFSIZ]; int endian4; @@ -1253,6 +1254,14 @@ int tracecmd_output_write_init(struct tracecmd_output *handler) endian4 = convert_endian_4(handler, handler->page_size); if (do_write_check(handler, &endian4, 4)) return -1; + if (HAS_SECTIONS(handler)) { + /* Write 0 as options offset and save its location */ + offset = 0; + handler->options_start = do_lseek(handler, 0, SEEK_CUR); + if (do_write_check(handler, &offset, 8)) + return -1; + } + handler->file_state = TRACECMD_FILE_INIT; return 0; } @@ -1321,7 +1330,7 @@ tracecmd_add_option_v(struct tracecmd_output *handle, * We can only add options before tracing data were written. * This may change in the future. */ - if (handle->file_state > TRACECMD_FILE_OPTIONS) + if (!HAS_SECTIONS(handle) && handle->file_state > TRACECMD_FILE_OPTIONS) return NULL; for (i = 0; i < count; i++) @@ -1334,8 +1343,7 @@ tracecmd_add_option_v(struct tracecmd_output *handle, return NULL; } } - - option = malloc(sizeof(*option)); + option = calloc(1, sizeof(*option)); if (!option) { tracecmd_warning("Could not allocate space for option"); free(data); @@ -1398,7 +1406,7 @@ int tracecmd_write_cpus(struct tracecmd_output *handle, int cpus) return 0; } -int tracecmd_write_options(struct tracecmd_output *handle) +static int write_options_v6(struct tracecmd_output *handle) { struct tracecmd_option *options; unsigned short option; @@ -1416,7 +1424,7 @@ int tracecmd_write_options(struct tracecmd_output *handle) if (do_write_check(handle, "options ", 10)) return -1; - + handle->options_start = do_lseek(handle, 0, SEEK_CUR); list_for_each_entry(options, &handle->options, list) { endian2 = convert_endian_2(handle, options->id); if (do_write_check(handle, &endian2, 2)) @@ -1440,11 +1448,83 @@ int tracecmd_write_options(struct tracecmd_output *handle) return -1; handle->file_state = TRACECMD_FILE_OPTIONS; + return 0; +} + +static int write_options_v7(struct tracecmd_output *handle) +{ + struct tracecmd_option *options; + unsigned long long endian8; + unsigned short endian2; + unsigned int endian4; + bool new = false; + tsize_t offset; + + /* Check if there are unsaved options */ + list_for_each_entry(options, &handle->options, list) { + if (!options->offset) { + new = true; + break; + } + } + + if (!new) + return 0; + offset = do_lseek(handle, 0, SEEK_CUR); + /* Append to the previous options section, if any */ + if (handle->options_start) { + if (do_lseek(handle, handle->options_start, SEEK_SET) == (off64_t)-1) + return -1; + endian8 = convert_endian_8(handle, offset); + if (do_write_check(handle, &endian8, 8)) + return -1; + if (do_lseek(handle, offset, SEEK_SET) == (off_t)-1) + return -1; + } + offset = out_write_section_header(handle, TRACECMD_OPTION_DONE, "options", 0, false); + if (offset == (off_t)-1) + return -1; + list_for_each_entry(options, &handle->options, list) { + /* Option is already saved, skip it */ + if (options->offset) + continue; + endian2 = convert_endian_2(handle, options->id); + if (do_write_check(handle, &endian2, 2)) + return -1; + endian4 = convert_endian_4(handle, options->size); + if (do_write_check(handle, &endian4, 4)) + return -1; + /* Save the data location */ + options->offset = do_lseek(handle, 0, SEEK_CUR); + if (do_write_check(handle, options->data, options->size)) + return -1; + } + + endian2 = convert_endian_2(handle, TRACECMD_OPTION_DONE); + if (do_write_check(handle, &endian2, 2)) + return -1; + endian4 = convert_endian_4(handle, 8); + if (do_write_check(handle, &endian4, 4)) + return -1; + endian8 = 0; + handle->options_start = do_lseek(handle, 0, SEEK_CUR); + if (do_write_check(handle, &endian8, 8)) + return -1; + if (out_update_section_header(handle, offset)) + return -1; return 0; } -int tracecmd_append_options(struct tracecmd_output *handle) +int tracecmd_write_options(struct tracecmd_output *handle) +{ + if (!HAS_SECTIONS(handle)) + return write_options_v6(handle); + return write_options_v7(handle); +} + + +static int append_options_v6(struct tracecmd_output *handle) { struct tracecmd_option *options; unsigned short option; @@ -1495,6 +1575,13 @@ int tracecmd_append_options(struct tracecmd_output *handle) return 0; } +int tracecmd_append_options(struct tracecmd_output *handle) +{ + if (!HAS_SECTIONS(handle)) + return append_options_v6(handle); + return write_options_v7(handle); +} + static struct tracecmd_option * add_buffer_option(struct tracecmd_output *handle, const char *name, int cpus) {