diff mbox series

[v4,07/10] trace-cmd dump: Dump trace file version 7

Message ID 20211111151250.87023-8-tz.stoyanov@gmail.com (mailing list archive)
State Awaiting Upstream
Headers show
Series trace-cmd dump - v7 update | expand

Commit Message

Tzvetomir Stoyanov (VMware) Nov. 11, 2021, 3:12 p.m. UTC 
Trace file version 7 has different structure than version 6. Separates
parsing both versions in different flows.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 tracecmd/trace-dump.c | 38 +++++++++++++++++++++++++++++---------
 1 file changed, 29 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/tracecmd/trace-dump.c b/tracecmd/trace-dump.c
index 2f8cd5fb..11a6e1df 100644
--- a/tracecmd/trace-dump.c
+++ b/tracecmd/trace-dump.c
@@ -929,6 +929,31 @@  static void dump_therest(int fd)
 	}
 }
 
+static void dump_v6_file(int fd)
+{
+	dump_header_page(fd);
+	dump_header_event(fd);
+	dump_ftrace_events_format(fd);
+	dump_events_format(fd);
+	dump_kallsyms(fd);
+	dump_printk(fd);
+	dump_cmdlines(fd);
+	dump_cpus_count(fd);
+	dump_therest(fd);
+}
+
+static void dump_v7_file(int fd)
+{
+	long long offset;
+
+	if (read_file_number(fd, &offset, 8))
+		die("cannot read offset of the first option section");
+
+	if (lseek64(fd, offset, SEEK_SET) == (off64_t)-1)
+		die("cannot goto options offset %lld", offset);
+	dump_options(fd);
+}
+
 static void free_sections(void)
 {
 	struct file_section *del;
@@ -956,15 +981,10 @@  static void dump_file(const char *file)
 
 	dump_initial_format(fd);
 	dump_compress(fd);
-	dump_header_page(fd);
-	dump_header_event(fd);
-	dump_ftrace_events_format(fd);
-	dump_events_format(fd);
-	dump_kallsyms(fd);
-	dump_printk(fd);
-	dump_cmdlines(fd);
-	dump_cpus_count(fd);
-	dump_therest(fd);
+	if (file_version < FILE_VERSION_SECTIONS)
+		dump_v6_file(fd);
+	else
+		dump_v7_file(fd);
 	free_sections();
 	tep_free(tep);
 	tep = NULL;