From 91c96f622ad9eadbf44a63b55289f673be9cf90e Mon Sep 17 00:00:00 2001
From: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Date: Wed, 25 Mar 2020 10:41:17 -0400
Subject: [PATCH] trigger: lttng_trigger_get_underlying_domain_type_restriction
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Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: I5fe156a09e4e4c833f84a0fe9027c838b73fe728
---
 include/lttng/trigger/trigger-internal.h |  8 ++++
 src/common/trigger.c                     | 47 ++++++++++++++++++++++++
 2 files changed, 55 insertions(+)

diff --git a/include/lttng/trigger/trigger-internal.h b/include/lttng/trigger/trigger-internal.h
index 873684769..e32ea737e 100644
--- a/include/lttng/trigger/trigger-internal.h
+++ b/include/lttng/trigger/trigger-internal.h
@@ -184,4 +184,12 @@ void lttng_trigger_fire(struct lttng_trigger *trigger);
 LTTNG_HIDDEN
 bool lttng_trigger_should_fire(const struct lttng_trigger *trigger);
 
+/*
+ * Return the type of any underlying domain restriction. If no particular
+ * requirement is present, returns LTTNG_DOMAIN_NONE.
+ */
+LTTNG_HIDDEN
+enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction(
+		const struct lttng_trigger *trigger);
+
 #endif /* LTTNG_TRIGGER_INTERNAL_H */
diff --git a/src/common/trigger.c b/src/common/trigger.c
index 8c43fdbd8..132fda138 100644
--- a/src/common/trigger.c
+++ b/src/common/trigger.c
@@ -7,10 +7,14 @@
 
 #include <lttng/trigger/trigger-internal.h>
 #include <lttng/condition/condition-internal.h>
+#include <lttng/condition/event-rule.h>
+#include <lttng/condition/buffer-usage.h>
+#include <lttng/event-rule/event-rule-internal.h>
 #include <lttng/action/action-internal.h>
 #include <common/credentials.h>
 #include <common/payload.h>
 #include <common/payload-view.h>
+#include <lttng/domain.h>
 #include <common/error.h>
 #include <common/dynamic-array.h>
 #include <common/optional.h>
@@ -881,3 +885,46 @@ void lttng_trigger_fire(struct lttng_trigger *trigger)
 		abort();
 	};
 }
+
+LTTNG_HIDDEN
+enum lttng_domain_type lttng_trigger_get_underlying_domain_type_restriction(
+		const struct lttng_trigger *trigger)
+{
+	enum lttng_domain_type type = LTTNG_DOMAIN_NONE;
+	const struct lttng_event_rule *event_rule;
+	enum lttng_condition_status c_status;
+	enum lttng_condition_type c_type;
+
+	assert(trigger);
+	assert(trigger->condition);
+
+	c_type = lttng_condition_get_type(trigger->condition);
+	assert (c_type != LTTNG_CONDITION_TYPE_UNKNOWN);
+
+	switch (c_type) {
+	case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
+	case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
+	case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
+		/* Apply to any domain. */
+		type = LTTNG_DOMAIN_NONE;
+		break;
+	case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT:
+		/* Return the domain of the event rule. */
+		c_status = lttng_condition_event_rule_get_rule(
+				trigger->condition, &event_rule);
+		assert(c_status == LTTNG_CONDITION_STATUS_OK);
+		type = lttng_event_rule_get_domain_type(event_rule);
+		break;
+	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+		/* Return the domain of the channel being monitored. */
+		c_status = lttng_condition_buffer_usage_get_domain_type(
+				trigger->condition, &type);
+		assert(c_status == LTTNG_CONDITION_STATUS_OK);
+		break;
+	default:
+		abort();
+	}
+
+	return type;
+}
-- 
2.34.1