X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=include%2Flttng%2Flttng.h;h=598abe07777d4b8594219e980ed242795d74b31d;hp=4741b68778f77522ad5d2cb975a4e80731bb01f5;hb=53a80697a772bc2e260e3dff006f910be6709f04;hpb=953192ba6eb2118c22bcfcb4bcd813f141b407e7

diff --git a/include/lttng/lttng.h b/include/lttng/lttng.h
index 4741b6877..598abe077 100644
--- a/include/lttng/lttng.h
+++ b/include/lttng/lttng.h
@@ -548,6 +548,17 @@ 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.