X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=include%2Flttng%2Flttng.h;h=0c32d941af6e17e859a41857c0d800d7be0cb5c2;hp=4741b68778f77522ad5d2cb975a4e80731bb01f5;hb=fceb65dfca20fb1e2071a44ada9fe61384d2b890;hpb=00e2e675d54dc726a7c8f8887c889cc8ef022003

diff --git a/include/lttng/lttng.h b/include/lttng/lttng.h
index 4741b6877..0c32d941a 100644
--- a/include/lttng/lttng.h
+++ b/include/lttng/lttng.h
@@ -269,7 +269,7 @@ struct lttng_event_function_attr {
  *
  * The structures should be initialized to zero before use.
  */
-#define LTTNG_EVENT_PADDING1               16
+#define LTTNG_EVENT_PADDING1               15
 #define LTTNG_EVENT_PADDING2               LTTNG_SYMBOL_NAME_LEN + 32
 struct lttng_event {
 	enum lttng_event_type type;
@@ -280,6 +280,7 @@ struct lttng_event {
 
 	int32_t enabled;	/* Does not apply: -1 */
 	pid_t pid;
+	unsigned char filter;	/* filter enabled ? */
 
 	char padding[LTTNG_EVENT_PADDING1];
 
@@ -548,6 +549,17 @@ extern int lttng_add_context(struct lttng_handle *handle,
 extern int lttng_enable_event(struct lttng_handle *handle,
 		struct lttng_event *ev, const char *channel_name);
 
+/*
+ * Apply a filter expression to an event.
+ *
+ * If event_name is NULL, the filter is applied to all events of the channel.
+ * If channel_name is NULL, a lookup of the event's channel is done.
+ * If both are NULL, the filter is applied to all events of all channels.
+ */
+extern int lttng_set_event_filter(struct lttng_handle *handle,
+		const char *event_name,
+		const char *channel_name,
+		const char *filter_expression);
 /*
  * Create or enable a channel.
  * The channel name cannot be NULL.