Set event exclusions in the target when event is created

Add a new function set_ust_event_exclusion() that calls the target-side
function that sets the exclusions to an event and reports possible errors.
Call set_ust_event_exclusion() in create_ust_event().

diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c
index 255a41b0d7ca46bd0ec7da805065f33c1d399c35..d8adccde214925f2f9cd68d20ef65dadc3617951 100644 (file)
--- a/src/bin/lttng-sessiond/ust-app.c
+++ b/src/bin/lttng-sessiond/ust-app.c
@@ -1136,6 +1136,47 @@ error:
        return ret;
 }
 
+/*
+ * Set event exclusions on the tracer.
+ */
+static
+int set_ust_event_exclusion(struct ust_app_event *ua_event,
+               struct ust_app *app)
+{
+       int ret;
+
+       health_code_update();
+
+       if (!ua_event->exclusion || !ua_event->exclusion->count) {
+               ret = 0;
+               goto error;
+       }
+
+       ret = ustctl_set_exclusion(app->sock, ua_event->exclusion,
+                       ua_event->obj);
+       if (ret < 0) {
+               if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
+                       ERR("UST app event %s exclusions failed for app (pid: %d) "
+                                       "with ret %d", ua_event->attr.name, app->pid, ret);
+               } else {
+                       /*
+                        * This is normal behavior, an application can die during the
+                        * creation process. Don't report an error so the execution can
+                        * continue normally.
+                        */
+                       ret = 0;
+                       DBG3("UST app event exclusion failed. Application is dead.");
+               }
+               goto error;
+       }
+
+       DBG2("UST exclusion set successfully for event %s", ua_event->name);
+
+error:
+       health_code_update();
+       return ret;
+}
+
 /*
  * Disable the specified event on to UST tracer for the UST session.
  */
@@ -1375,6 +1416,14 @@ int create_ust_event(struct ust_app *app, struct ust_app_session *ua_sess,
                }
        }
 
+       /* Set exclusions for the event */
+       if (ua_event->exclusion) {
+               ret = set_ust_event_exclusion(ua_event, app);
+               if (ret < 0) {
+                       goto error;
+               }
+       }
+
        /* If event not enabled, disable it on the tracer */
        if (ua_event->enabled == 0) {
                ret = disable_ust_event(app, ua_sess, ua_event);