From: David Goulet <david.goulet@polymtl.ca>
Date: Tue, 24 May 2011 17:16:15 +0000 (-0400)
Subject: Add kernel metadata support to lttng and API
X-Git-Tag: v2.0-pre1~123
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=a5c5a2bd8c78b788f6094d80c188af0db78c17ec

Add kernel metadata support to lttng and API

Signed-off-by: David Goulet <david.goulet@polymtl.ca>
---

diff --git a/include/lttng/lttng.h b/include/lttng/lttng.h
index 98d632c76..e47338f40 100644
--- a/include/lttng/lttng.h
+++ b/include/lttng/lttng.h
@@ -82,5 +82,6 @@ extern int lttng_kernel_create_session(void);
 extern int lttng_kernel_start_tracing(void);
 extern int lttng_kernel_stop_tracing(void);
 extern int lttng_kernel_create_channel(void);
+extern int lttng_kernel_open_metadata(void);
 
 #endif /* _LIBLTTNGCTL_H */
diff --git a/liblttngctl/liblttngctl.c b/liblttngctl/liblttngctl.c
index 2cf79f4ed..d782bb07e 100644
--- a/liblttngctl/liblttngctl.c
+++ b/liblttngctl/liblttngctl.c
@@ -203,6 +203,16 @@ int lttng_kernel_create_channel(void)
 	return ask_sessiond(KERNEL_CREATE_CHANNEL, NULL);
 }
 
+/*
+ *  lttng_kernel_open_metadata
+ *
+ *  Open metadata in the kernel tracer.
+ */
+int lttng_kernel_open_metadata(void)
+{
+	return ask_sessiond(KERNEL_OPEN_METADATA, NULL);
+}
+
 /*
  *  lttng_kernel_start_tracing
  *
diff --git a/lttng/lttng.c b/lttng/lttng.c
index c7c88f631..9714e8a34 100644
--- a/lttng/lttng.c
+++ b/lttng/lttng.c
@@ -196,6 +196,12 @@ 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: