#include <string.h>
#include <lttng/lttng.h>
+#include <lttng/condition/condition.h>
+#include <lttng/condition/event-rule.h>
+#include <lttng/event-rule/event-rule.h>
+#include <lttng/event-rule/event-rule-internal.h>
#include <common/error.h>
#include <common/sessiond-comm/sessiond-comm.h>
#include <common/filter.h>
#include "trace-kernel.h"
#include "trace-ust.h"
#include "agent.h"
+#include "utils.h"
/*
* Add unique UST event based on the event name, filter bytecode and loglevel.
return ret;
}
+static void agent_enable_all(struct agent *agt)
+{
+ struct agent_event *aevent;
+ struct lttng_ht_iter iter;
+
+ /* Flag every event that they are now enabled. */
+ rcu_read_lock();
+ cds_lfht_for_each_entry (
+ agt->events->ht, &iter.iter, aevent, node.node) {
+ aevent->enabled = 1;
+ }
+ rcu_read_unlock();
+}
+
/*
* Enable all agent event for a given UST session.
*
struct lttng_filter_bytecode *filter ,char *filter_expression)
{
int ret;
- struct agent_event *aevent;
- struct lttng_ht_iter iter;
assert(usess);
goto error;
}
- /* Flag every event that they are now enabled. */
- rcu_read_lock();
- cds_lfht_for_each_entry(agt->events->ht, &iter.iter, aevent,
- node.node) {
- aevent->enabled = 1;
- }
- rcu_read_unlock();
+ agent_enable_all(agt);
ret = LTTNG_OK;
return ret;
}
-/*
- * Enable a single agent event for a given UST session.
- *
- * Return LTTNG_OK on success or else a LTTNG_ERR* code.
- */
-int event_agent_enable(struct ltt_ust_session *usess,
- struct agent *agt, struct lttng_event *event,
+static int agent_enable(struct agent *agt,
+ struct lttng_event *event,
struct lttng_filter_bytecode *filter,
char *filter_expression)
{
int ret, created = 0;
struct agent_event *aevent;
- assert(usess);
assert(event);
assert(agt);
- DBG("Event agent enabling %s for session %" PRIu64 " with loglevel type %d "
- ", loglevel %d and filter \"%s\"", event->name,
- usess->id, event->loglevel_type, event->loglevel,
- filter_expression ? filter_expression : "NULL");
-
aevent = agent_find_event(event->name, event->loglevel_type,
event->loglevel, filter_expression, agt);
if (!aevent) {
return ret;
}
+/*
+ * Enable a single agent event for a given UST session.
+ *
+ * Return LTTNG_OK on success or else a LTTNG_ERR* code.
+ */
+int event_agent_enable(struct ltt_ust_session *usess,
+ struct agent *agt,
+ struct lttng_event *event,
+ struct lttng_filter_bytecode *filter,
+ char *filter_expression)
+{
+ assert(usess);
+ assert(event);
+ assert(agt);
+
+ DBG("Event agent enabling %s for session %" PRIu64
+ " with loglevel type %d "
+ ", loglevel %d and filter \"%s\"",
+ event->name, usess->id, event->loglevel_type,
+ event->loglevel,
+ filter_expression ? filter_expression : "NULL");
+
+ return agent_enable(agt, event, filter, filter_expression);
+}
+
+/*
+ * Enable a single agent event for a trigger.
+ *
+ * Return LTTNG_OK on success or else a LTTNG_ERR* code.
+ */
+int trigger_agent_enable(const struct lttng_trigger *trigger, struct agent *agt)
+{
+ int ret;
+ enum lttng_condition_status c_status;
+ enum lttng_domain_type d_type;
+ const struct lttng_condition *condition;
+ const struct lttng_event_rule *rule;
+ const char *filter_expression;
+ char *filter_expression_copy = NULL;
+ const struct lttng_filter_bytecode *filter_bytecode;
+ struct lttng_filter_bytecode *filter_bytecode_copy = NULL;
+ struct lttng_event *event = NULL;
+
+ assert(trigger);
+ assert(agt);
+
+ condition = lttng_trigger_get_const_condition(trigger);
+
+ assert(lttng_condition_get_type(condition) ==
+ LTTNG_CONDITION_TYPE_EVENT_RULE_HIT);
+
+ c_status = lttng_condition_event_rule_get_rule(condition, &rule);
+ assert(c_status == LTTNG_CONDITION_STATUS_OK);
+
+ assert(lttng_event_rule_get_type(rule) ==
+ LTTNG_EVENT_RULE_TYPE_TRACEPOINT);
+
+ d_type = lttng_event_rule_get_domain_type(rule);
+ assert(d_type == agt->domain);
+
+ event = lttng_event_rule_generate_lttng_event(rule);
+ if (!event) {
+ ret = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ /* Get the internal filter_expression and bytecode */
+ filter_expression = lttng_event_rule_get_filter(rule);
+ if (filter_expression) {
+ filter_expression_copy = strdup(filter_expression);
+ if (!filter_expression_copy) {
+ ret = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ /* Get the filter bytecode */
+ filter_bytecode = lttng_event_rule_get_filter_bytecode(rule);
+ if (filter_bytecode) {
+ filter_bytecode_copy =
+ copy_filter_bytecode(filter_bytecode);
+ if (!filter_bytecode_copy) {
+ ret = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+ }
+ }
+
+ DBG("Event agent enabling %s for trigger %" PRIu64
+ " with loglevel type %d "
+ ", loglevel %d and filter \"%s\"",
+ event->name, lttng_trigger_get_key(trigger),
+ event->loglevel_type, event->loglevel,
+ filter_expression ? filter_expression : "NULL");
+
+ ret = agent_enable(agt, event, filter_bytecode_copy,
+ filter_expression_copy);
+ /* Ownership was passed even in case of error */
+ filter_expression_copy = NULL;
+ filter_bytecode_copy = NULL;
+
+end:
+ free(filter_expression_copy);
+ free(filter_bytecode_copy);
+ free(event);
+ return ret;
+}
+
/*
* Return the default event name associated with the provided UST domain. Return
* NULL on error.
return default_event_name;
}
+static int trigger_agent_disable_one(const struct lttng_trigger *trigger,
+ struct agent *agt,
+ struct agent_event *aevent)
+
+{
+ int ret;
+
+ assert(agt);
+ assert(trigger);
+ assert(aevent);
+
+ /*
+ * Actual ust event un-registration happens on the trigger
+ * un-registration at that point.
+ */
+
+ DBG("Event agent disabling %s (loglevel type %d, loglevel value %d) for trigger %" PRIu64,
+ aevent->name, aevent->loglevel_type,
+ aevent->loglevel_value, lttng_trigger_get_key(trigger));
+
+ /* Already disabled? */
+ if (!aevent->enabled) {
+ goto end;
+ }
+
+ ret = agent_disable_event(aevent, agt->domain);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+
+end:
+ return LTTNG_OK;
+
+error:
+ return ret;
+}
+
/*
* Disable a given agent event for a given UST session.
*
return ret;
}
+/*
+ * Disable agent event matching a given trigger.
+ *
+ * Return LTTNG_OK on success or else a LTTNG_ERR* code.
+ */
+int trigger_agent_disable(
+ const struct lttng_trigger *trigger, struct agent *agt)
+{
+ int ret = LTTNG_OK;
+ struct agent_event *aevent;
+
+ assert(trigger);
+ assert(agt);
+
+ DBG("Event agent disabling for trigger %" PRIu64,
+ lttng_trigger_get_key(trigger));
+
+ rcu_read_lock();
+ aevent = agent_find_event_by_trigger(trigger, agt);
+
+ if (aevent == NULL) {
+ DBG2("Event agent NOT found by trigger %" PRIu64,
+ lttng_trigger_get_key(trigger));
+ ret = LTTNG_ERR_UST_EVENT_NOT_FOUND;
+ goto end;
+ }
+
+ ret = trigger_agent_disable_one(trigger, agt, aevent);
+
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+
+end:
+ rcu_read_unlock();
+ return ret;
+}
+
/*
* Disable all agent events matching a given name for a given UST session.
*
projects / lttng-tools.git / blobdiff