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Mon, 13 Sep 2021 05:50:42 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH 02/10] trace-cmd dump: Print compression header Date: Mon, 13 Sep 2021 15:50:31 +0300 Message-Id: <20210913125039.3680986-3-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210913125039.3680986-1-tz.stoyanov@gmail.com> References: <20210913125039.3680986-1-tz.stoyanov@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Dump the compression header of trace file version 7 Signed-off-by: Tzvetomir Stoyanov (VMware) --- tracecmd/trace-dump.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/tracecmd/trace-dump.c b/tracecmd/trace-dump.c index d0278f7e..3cce231f 100644 --- a/tracecmd/trace-dump.c +++ b/tracecmd/trace-dump.c @@ -217,6 +217,29 @@ 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 zname[DUMP_SIZE]; + char zver[DUMP_SIZE]; + + if (file_version < FILE_VERSION_COMPRESSION) + return; + + /* get compression header */ + if (read_file_string(fd, zname, DUMP_SIZE)) + die("no compression header"); + if (read_file_string(fd, zver, DUMP_SIZE)) + die("no compression version"); + do_print((SUMMARY), "\t\t%s\t[Compression algorithm]\n", zname); + do_print((SUMMARY), "\t\t%s\t[Compression version]\n", zver); + + if (strcmp(zname, "none")) { + compress = tracecmd_compress_alloc(zname, zver, fd, tep, NULL); + if (!compress) + die("cannot uncompress the file"); + } +} + static void dump_header_page(int fd) { unsigned long long size; @@ -715,6 +738,7 @@ 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);