X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=lttng%2Flttng.c;h=75cb1b47372323c656d59b8851fc41f9bb85b4dc;hb=947308c48c77d6dfd601cfc575d61ea833ed0b6e;hp=c7c88f6315a0a8987912dc003979d0f8454247bd;hpb=f34daff7d0139d162e949f1b4fbb4cd003746b15;p=lttng-tools.git

diff --git a/lttng/lttng.c b/lttng/lttng.c
index c7c88f631..75cb1b473 100644
--- a/lttng/lttng.c
+++ b/lttng/lttng.c
@@ -32,8 +32,8 @@
 
 #include <lttng/lttng.h>
 
-#include "lttng.h"
 #include "lttngerr.h"
+#include "options.h"
 
 /* Variables */
 static char *progname;
@@ -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
  *
@@ -196,6 +240,12 @@ static int process_kernel_create_trace(void)
 		goto error;
 	}
 
+	/* Opening metadata for session */
+	ret = lttng_kernel_open_metadata();
+	if (ret < 0) {
+		goto error;
+	}
+
 	return 0;
 
 error:
@@ -519,6 +569,9 @@ static int validate_options(void)
 	} else if (opt_stop_trace && opt_trace_pid != 0 && opt_trace_name == NULL) {
 		ERR("Please specify a trace name for user-space tracing");
 		goto error;
+	} else if (opt_stop_trace && opt_session_name == NULL) {
+		ERR("Please specify a session to stop tracing");
+		goto error;
 	}
 
 	/* If start trace, auto start tracing */
@@ -592,8 +645,8 @@ static int check_ltt_sessiond(void)
 	int ret;
 	char *pathname = NULL, *alloc_pathname = NULL;
 
-	ret = lttng_check_session_daemon();
-	if (ret < 0) {
+	ret = lttng_session_daemon_alive();
+	if (ret == 0) {	/* not alive */
 		/* Try command line option path */
 		if (opt_sessiond_path != NULL) {
 			ret = access(opt_sessiond_path, F_OK | X_OK);