lttng: Add list-triggers command

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

diff --git a/src/common/trigger.c b/src/common/trigger.c
index 8c43fdbd8aaa8aa7f7ad1fda253ea8701c7f751c..55ab99729c338259d72476e1a8074d12b9e5f43f 100644 (file)
--- a/src/common/trigger.c
+++ b/src/common/trigger.c
@@ -7,10 +7,15 @@
 
 #include <lttng/trigger/trigger-internal.h>
 #include <lttng/condition/condition-internal.h>
+#include <lttng/condition/event-rule.h>
+#include <lttng/condition/event-rule-internal.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>
@@ -79,11 +84,10 @@ struct lttng_condition *lttng_trigger_get_condition(
        return trigger ? trigger->condition : NULL;
 }
 
-LTTNG_HIDDEN
 const struct lttng_condition *lttng_trigger_get_const_condition(
                const struct lttng_trigger *trigger)
 {
-       return trigger->condition;
+       return trigger ? trigger->condition : NULL;
 }
 
 
@@ -98,11 +102,10 @@ struct lttng_action *lttng_trigger_get_action(
        return trigger ? trigger->action : NULL;
 }
 
-LTTNG_HIDDEN
 const struct lttng_action *lttng_trigger_get_const_action(
                const struct lttng_trigger *trigger)
 {
-       return trigger->action;
+       return trigger ? trigger->action : NULL;
 }
 
 static void trigger_destroy_ref(struct urcu_ref *ref)
@@ -881,3 +884,90 @@ 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;
+}
+
+/*
+ * Generate bytecode related to the trigger.
+ * On success LTTNG_OK. On error, returns lttng_error code.
+ */
+LTTNG_HIDDEN
+enum lttng_error_code lttng_trigger_generate_bytecode(
+               struct lttng_trigger *trigger,
+               const struct lttng_credentials *creds)
+{
+       enum lttng_error_code ret;
+       struct lttng_condition *condition = NULL;
+
+       condition = lttng_trigger_get_condition(trigger);
+       if (!condition) {
+               ret = LTTNG_ERR_INVALID_TRIGGER;
+               goto end;
+       }
+
+       switch (lttng_condition_get_type(condition)) {
+       case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT:
+       {
+               struct lttng_event_rule *event_rule;
+               const enum lttng_condition_status condition_status =
+                               lttng_condition_event_rule_borrow_rule_mutable(
+                                       condition, &event_rule);
+
+               assert(condition_status == LTTNG_CONDITION_STATUS_OK);
+               ret = lttng_event_rule_generate_filter_bytecode(
+                               event_rule, creds);
+               if (ret != LTTNG_OK) {
+                       goto end;
+               }
+
+               ret = LTTNG_OK;
+               break;
+       }
+       default:
+               ret = LTTNG_OK;
+               break;
+       }
+end:
+       return ret;
+}