[05/10] trace-cmd library: Add new API to get compression of input handler

Commit Message

Tzvetomir Stoyanov (VMware) April 22, 2021, 7:38 a.m. UTC

The new API returns a handler to compression algorithm, used to compress
the trace file asociated with given input file handler:
 tracecmd_get_file_comperssion()

Signed-off-by: Tzvetomir Stoyanov (VMware) <[e-mail]>
---
 lib/trace-cmd/include/private/trace-cmd-private.h |  2 ++
 lib/trace-cmd/trace-input.c                       | 11 +++++++++++
 2 files changed, 13 insertions(+)

Patch

diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h
index c562fc5d..4d2116ab 100644
--- a/lib/trace-cmd/include/private/trace-cmd-private.h
+++ b/lib/trace-cmd/include/private/trace-cmd-private.h
@@ -236,6 +236,8 @@  unsigned long long
 tracecmd_get_cursor(struct tracecmd_input *handle, int cpu);
 
 unsigned long tracecmd_get_file_version(struct tracecmd_input *handle);
+struct tracecmd_compress_proto *
+tracecmd_get_file_comperssion(struct tracecmd_input *handle);
 
 int tracecmd_ftrace_overrides(struct tracecmd_input *handle, struct tracecmd_ftrace *finfo);
 bool tracecmd_get_use_trace_clock(struct tracecmd_input *handle);
diff --git a/lib/trace-cmd/trace-input.c b/lib/trace-cmd/trace-input.c
index b96b0192..ad5af5fa 100644
--- a/lib/trace-cmd/trace-input.c
+++ b/lib/trace-cmd/trace-input.c
@@ -4192,6 +4192,17 @@  unsigned long tracecmd_get_file_version(struct tracecmd_input *handle)
 	return handle->file_version;
 }
 
+/**
+ * tracecmd_get_file_comperssion - return a handler to compression protocol,
+ *				   used to compress the trace file
+ * @handle: input handle for the trace.dat file
+ */
+struct tracecmd_compress_proto *
+tracecmd_get_file_comperssion(struct tracecmd_input *handle)
+{
+	return handle->z_proto;
+}
+
 /**
  * tracecmd_get_use_trace_clock - return use_trace_clock
  * @handle: input handle for the trace.dat file