MI: add <filter_expression> (event filter expression)

[lttng-tools.git] / src / common / mi-lttng.c

diff --git a/src/common/mi-lttng.c b/src/common/mi-lttng.c
index fc22e4e0cabeb34f9f75b78607d79d0b5337f7f2..ef98687d868108ef6e37e604b9c5e6c577f1cf00 100644 (file)
--- a/src/common/mi-lttng.c
+++ b/src/common/mi-lttng.c
@@ -922,6 +922,7 @@ int mi_lttng_event_common_attributes(struct mi_writer *writer,
                struct lttng_event *event)
 {
        int ret;
+       const char *filter_expression;
 
        /* Open event element */
        ret = mi_lttng_writer_open_element(writer, config_element_event);
@@ -954,6 +955,23 @@ int mi_lttng_event_common_attributes(struct mi_writer *writer,
        ret = mi_lttng_writer_write_element_bool(writer,
                        config_element_filter, event->filter);
 
+       /* Event filter expression */
+       ret = lttng_event_get_filter_string(event, &filter_expression);
+
+       if (ret) {
+               goto end;
+       }
+
+       if (filter_expression) {
+               ret = mi_lttng_writer_write_element_string(writer,
+                       config_element_filter_expression,
+                       filter_expression);
+
+               if (ret) {
+                       goto end;
+               }
+       }
+
 end:
        return ret;
 }