From patchwork Mon May 10 06:16:31 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: 12246941 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=-13.0 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,UNWANTED_LANGUAGE_BODY, 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 E487BC433ED for ; Mon, 10 May 2021 06:16:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BA5BA613CD for ; Mon, 10 May 2021 06:16:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230059AbhEJGSB (ORCPT ); Mon, 10 May 2021 02:18:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230085AbhEJGSA (ORCPT ); Mon, 10 May 2021 02:18:00 -0400 Received: from mail-ej1-x62f.google.com (mail-ej1-x62f.google.com [IPv6:2a00:1450:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6B237C061573 for ; Sun, 9 May 2021 23:16:55 -0700 (PDT) Received: by mail-ej1-x62f.google.com with SMTP id gx5so22685396ejb.11 for ; Sun, 09 May 2021 23:16:55 -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=KcqaeC0E8JB2QkU0ajzNoubjwOnME2GGI/iefg1BUC4=; b=L/x9yt27CLF/HYFJI+tIYbXqdy14IF0+v3rpdoUKR8M/arOzPlWlV3dIWKhc0OizJb Kr7B510SNGTVNU5rluUoUkv/DIiLcHrXmPLvv4SJL/I0dCOnxp8xIur/ZzSvbA8GspiV saPJ1B1QvV/lNvcwsic/lvQj2/26B70092xQjE0o6tFmvwA6i/RgRpeBDH65PwiHWEL8 4nWL2030Z+7z//IfmkCION4CG5B5O8SyOLAxz9r21EDoziTgjnxNU512yIrsnqqviLkR z8lt9GSVS2pL84sAJdd04CMG8qY0kxKearZQAQM9tx5nRMz6mDfPbfQ73OzTvKwWw2zw e2+g== 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=KcqaeC0E8JB2QkU0ajzNoubjwOnME2GGI/iefg1BUC4=; b=DttUAmjED9YFrjOkMIupq87BhltHk4qJWA5qLAOZk4KEuYaBr++tSMRhJYa7oemEI9 339CJb4pGaJvKjl8I46ky1/po10u1pAniUL63J2x95XjKTxUCWXXsElTrrALD5JwVZgv FQzf9xD/yZDHlfoI/Wn7eO4biQ1VdDaC9bCWORsL4MA3xQY+4DZRSf8T/pcIsoIR8XxX 7aBaZaHSB56m3PCWhtXK/HYSQRyrjumWa50r3hZ8jdegxUSzT+aNtIRynxCoG8qJxdtD D9XziEQ+BfVSLIvHrC+xmK5W4uMb+VfnLAl38XBfv1sj1yt2kIu91lKNYUQ6TR+pVFEr jZGQ== X-Gm-Message-State: AOAM5320Rrbij5OTK+LtuiJvhjYOPj4h4gs31ZircQlBHqDVo7sNnV70 pmhRtkZsSxMlBtVhWUSTPzs= X-Google-Smtp-Source: ABdhPJy6TvGtLpLoj81rsWz4xLc8a3AzqDndKgDLoL9XKgIVRQbSX7dPW9R5FOnjFgwIb1SXTxpBEQ== X-Received: by 2002:a17:906:590b:: with SMTP id h11mr23988708ejq.147.1620627414200; Sun, 09 May 2021 23:16:54 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id u3sm5055205eja.25.2021.05.09.23.16.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 May 2021 23:16:53 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH v2 16/21] trace-cmd dump: Add support for trace files version 7 Date: Mon, 10 May 2021 09:16:31 +0300 Message-Id: <20210510061636.1794357-17-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510061636.1794357-1-tz.stoyanov@gmail.com> References: <20210510061636.1794357-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Added support to read and dump information of trace files version 7. Signed-off-by: Tzvetomir Stoyanov (VMware) --- tracecmd/trace-dump.c | 125 +++++++++++++++++++++++++++++++++++------- 1 file changed, 105 insertions(+), 20 deletions(-) diff --git a/tracecmd/trace-dump.c b/tracecmd/trace-dump.c index 03cc82b4..ed82104b 100644 --- a/tracecmd/trace-dump.c +++ b/tracecmd/trace-dump.c @@ -26,6 +26,9 @@ static struct tep_handle *tep; static unsigned int trace_cpus; static int has_clock; +static unsigned long file_version; +static bool read_compress; +static struct tracecmd_compression *compress; enum dump_items { SUMMARY = (1 << 0), @@ -52,46 +55,62 @@ enum dump_items verbosity; tracecmd_plog(fmt, ##__VA_ARGS__); \ } while (0) -static int read_file_string(int fd, char *dst, int len) +static int read_fd(int fd, char *dst, int len) { size_t size = 0; int r; do { - r = read(fd, dst+size, 1); + r = read(fd, dst+size, len); if (r > 0) { - size++; - len--; + size += r; + len -= r; } else break; - if (!dst[size - 1]) - break; - } while (r > 0 && len); + } while (r > 0); - if (!size || dst[size - 1]) + if (len) return -1; - return 0; + return size; } -static int read_file_bytes(int fd, char *dst, int len) +static int read_compressed(int fd, char *dst, int len) +{ + + if (read_compress) + return tracecmd_compress_read(compress, dst, len); + return read_fd(fd, dst, len); +} + +static int read_file_string(int fd, char *dst, int len) { size_t size = 0; int r; do { - r = read(fd, dst+size, len); + r = read_compressed(fd, dst+size, 1); if (r > 0) { - size += r; - len -= r; + size++; + len--; } else break; - } while (r > 0); + if (!dst[size - 1]) + break; + } while (r > 0 && len); - if (len) + if (!size || dst[size - 1]) return -1; return 0; } +static int read_file_bytes(int fd, char *dst, int len) +{ + int ret; + + ret = read_compressed(fd, dst, len); + return ret < 0 ? ret : 0; +} + static void read_dump_string(int fd, int size, enum dump_items id) { char buf[DUMP_SIZE]; @@ -146,7 +165,6 @@ static void dump_initial_format(int fd) char magic[] = TRACECMD_MAGIC; char buf[DUMP_SIZE]; int val4; - unsigned long ver; do_print(SUMMARY, "\t[Initial format]\n"); @@ -168,11 +186,11 @@ static void dump_initial_format(int fd) die("no version string"); do_print(SUMMARY, "\t\t%s\t[Version]\n", buf); - ver = strtol(buf, NULL, 10); - if (!ver && errno) + file_version = strtol(buf, NULL, 10); + if (!file_version && errno) die("Invalid file version string %s", buf); - if (!tracecmd_is_version_supported(ver)) - die("Unsupported file version %lu", ver); + if (!tracecmd_is_version_supported(file_version)) + die("Unsupported file version %lu", file_version); /* get file endianness*/ if (read_file_bytes(fd, buf, 1)) @@ -192,6 +210,29 @@ static void dump_initial_format(int fd) do_print(SUMMARY, "\t\t%d\t[Page size, bytes]\n", val4); } +static void dump_compress(int fd) +{ + char compr[DUMP_SIZE]; + char *ver = NULL; + + if (file_version < 7) + return; + + /* get compression header */ + if (read_file_string(fd, compr, DUMP_SIZE)) + die("no compression header"); + ver = strchr(compr, ' '); + if (!ver) + die("no compression version"); + *ver = '\0'; + do_print((SUMMARY), "\t\t%s\t[Compression algorithm]\n", compr); + do_print((SUMMARY), "\t\t%s\t[Compression version]\n", ver + 1); + + compress = tracecmd_compress_alloc(compr, ver + 1, fd, tep, NULL); + if (!compress) + die("cannot uncomress the file"); +} + static void dump_header_page(int fd) { unsigned long long size; @@ -234,11 +275,34 @@ static void dump_header_event(int fd) read_dump_string(fd, size, HEAD_EVENT); } +static void uncompress_reset(void) +{ + if (compress && file_version >= 7) { + read_compress = false; + tracecmd_compress_reset(compress); + } +} + +static int uncompress_block(void) +{ + int ret = 0; + + if (compress && file_version >= 7) { + ret = tracecmd_uncompress_block(compress); + if (!ret) + read_compress = true; + + } + return ret; +} + static void dump_ftrace_events_format(int fd) { unsigned long long size; unsigned int count; + if (uncompress_block()) + die("cannot uncompress file block"); do_print((SUMMARY | FTRACE_FORMAT), "\t[Ftrace format, "); if (read_file_number(fd, &count, 4)) die("cannot read the count of the ftrace events"); @@ -251,6 +315,7 @@ static void dump_ftrace_events_format(int fd) read_dump_string(fd, size, FTRACE_FORMAT); count--; } + uncompress_reset(); } static void dump_events_format(int fd) @@ -262,6 +327,9 @@ static void dump_events_format(int fd) do_print((SUMMARY | EVENT_FORMAT | EVENT_SYSTEMS), "\t[Events format, "); + if (uncompress_block()) + die("cannot uncompress file block"); + if (read_file_number(fd, &systems, 4)) die("cannot read the count of the event systems"); @@ -284,6 +352,7 @@ static void dump_events_format(int fd) } systems--; } + uncompress_reset(); } static void dump_kallsyms(int fd) @@ -292,12 +361,17 @@ static void dump_kallsyms(int fd) do_print((SUMMARY | KALLSYMS), "\t[Kallsyms, "); + if (uncompress_block()) + die("cannot uncompress file block"); + if (read_file_number(fd, &size, 4)) die("cannot read the size of the kallsyms"); do_print((SUMMARY | KALLSYMS), "%d bytes]\n", size); read_dump_string(fd, size, KALLSYMS); + + uncompress_reset(); } static void dump_printk(int fd) @@ -306,12 +380,17 @@ static void dump_printk(int fd) do_print((SUMMARY | TRACE_PRINTK), "\t[Trace printk, "); + if (uncompress_block()) + die("cannot uncompress file block"); + if (read_file_number(fd, &size, 4)) die("cannot read the size of the trace printk"); do_print((SUMMARY | TRACE_PRINTK), "%d bytes]\n", size); read_dump_string(fd, size, TRACE_PRINTK); + + uncompress_reset(); } static void dump_cmdlines(int fd) @@ -320,12 +399,17 @@ static void dump_cmdlines(int fd) do_print((SUMMARY | CMDLINES), "\t[Saved command lines, "); + if (uncompress_block()) + die("cannot uncompress file block"); + if (read_file_number(fd, &size, 8)) die("cannot read the size of the saved command lines"); do_print((SUMMARY | CMDLINES), "%d bytes]\n", size); read_dump_string(fd, size, CMDLINES); + + uncompress_reset(); } static void dump_cpus_count(int fd) @@ -669,6 +753,7 @@ static void dump_file(const char *file) do_print(SUMMARY, "\n Tracing meta data in file %s:\n", file); dump_initial_format(fd); + dump_compress(fd); dump_header_page(fd); dump_header_event(fd); dump_ftrace_events_format(fd);