X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=lttng%2Flttng.c;h=7fbbcd68f4f216388aedc661f8b2cef4951c0778;hp=9714e8a3476c10ad721362bca4d019c1c2fc62ae;hb=8c0faa1d8372c06087498985643ec9d2619d785b;hpb=4e332453e14dd64400835b60c0a93c3629e173d3

diff --git a/lttng/lttng.c b/lttng/lttng.c
index 9714e8a34..7fbbcd68f 100644
--- a/lttng/lttng.c
+++ b/lttng/lttng.c
@@ -50,6 +50,7 @@ static int process_opt_list_traces(void);
 static int process_opt_create_session(void);
 static int process_kernel_create_trace(void);
 static int process_opt_kernel_event(void);
+static int process_kernel_start_trace(void);
 static int set_session_uuid(void);
 static void sighandler(int sig);
 static int set_signal_handler(void);
@@ -137,6 +138,22 @@ static int process_client_opt(void)
 		} else {
 			// Enable all events
 		}
+
+		if (auto_trace || opt_start_trace) {
+			DBG("Starting kernel tracing");
+			ret = process_kernel_start_trace();
+			if (ret < 0) {
+				goto end;
+			}
+		}
+
+		if (opt_stop_trace) {
+			DBG("Stopping kernel tracing");
+			ret = lttng_kernel_stop_tracing();
+			if (ret < 0) {
+				goto end;
+			}
+		}
 	}
 
 	if (opt_trace_pid != 0) {
@@ -175,6 +192,33 @@ error:	/* fall through */
 	return ret;
 }
 
+/*
+ *  process_kernel_start_trace
+ *
+ *  Start a kernel trace.
+ */
+static int process_kernel_start_trace(void)
+{
+	int ret;
+
+	ret = lttng_kernel_create_stream();
+	if (ret < 0) {
+		goto error;
+	}
+
+	ret = lttng_kernel_start_tracing();
+	if (ret < 0) {
+		goto error;
+	}
+
+	MSG("Kernel tracing started");
+
+	return 0;
+
+error:
+	return ret;
+}
+
 /*
  *  process_kernel_create_trace
  *