#include <urcu/uatomic.h>
#include <urcu/rculist.h>
+#include <lttng/event-rule/event-rule.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-rule/tracepoint.h>
+#include <lttng/condition/condition.h>
+#include <lttng/condition/event-rule.h>
+#include <lttng/domain-internal.h>
+
#include <common/common.h>
#include <common/sessiond-comm/agent.h>
}
/*
- * Match function for the events hash table lookup by name and loglevel.
+ * Match function for the events hash table lookup by name, log level and
+ * filter expression.
*/
static int ht_match_event(struct cds_lfht_node *node,
const void *_key)
}
}
- event->enabled = 1;
+ event->enabled_count++;
ret = LTTNG_OK;
error:
struct lttng_ht_iter iter;
assert(event);
- if (!event->enabled) {
+ if (!AGENT_EVENT_IS_ENABLED(event)) {
+ goto end;
+ }
+
+ if (--event->enabled_count != 0) {
+ /*
+ * Agent event still enabled. Disable the agent event only when
+ * all "users" have disabled it (event notifiers, event rules,
+ * etc.).
+ */
+ ret = LTTNG_OK;
goto end;
}
}
}
- event->enabled = 0;
+ /* event->enabled_count is now 0. */
+ assert(!AGENT_EVENT_IS_ENABLED(event));
error:
rcu_read_unlock();
ht_match_event_by_name, &key, &iter->iter);
}
+/*
+ * Find the agent event matching a trigger.
+ *
+ * RCU read side lock MUST be acquired. It must be held for as long as
+ * the returned agent_event is used.
+ *
+ * Return object if found else NULL.
+ */
+struct agent_event *agent_find_event_by_trigger(
+ const struct lttng_trigger *trigger, struct agent *agt)
+{
+ enum lttng_condition_status c_status;
+ enum lttng_event_rule_status er_status;
+ enum lttng_domain_type domain;
+ const struct lttng_condition *condition;
+ const struct lttng_event_rule *rule;
+ const char *name;
+ const char *filter_expression;
+ /* Unused when loglevel_type is 'ALL'. */
+ int loglevel_value = 0;
+ enum lttng_loglevel_type loglevel_type;
+
+ assert(agt);
+ assert(agt->events);
+
+ 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);
+
+ domain = lttng_event_rule_get_domain_type(rule);
+ assert(domain == LTTNG_DOMAIN_JUL || domain == LTTNG_DOMAIN_LOG4J ||
+ domain == LTTNG_DOMAIN_PYTHON);
+
+ /* Get the event's pattern ('name' in the legacy terminology). */
+ er_status = lttng_event_rule_tracepoint_get_pattern(rule, &name);
+ assert(er_status == LTTNG_EVENT_RULE_STATUS_OK);
+
+ /* Get the internal filter expression. */
+ filter_expression = lttng_event_rule_get_filter(rule);
+
+ er_status = lttng_event_rule_tracepoint_get_log_level_type(
+ rule, &loglevel_type);
+ assert(er_status == LTTNG_EVENT_RULE_STATUS_OK);
+
+ if (loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
+ er_status = lttng_event_rule_tracepoint_get_log_level(
+ rule, &loglevel_value);
+ assert(er_status == LTTNG_EVENT_RULE_STATUS_OK);
+ }
+
+ return agent_find_event(name, loglevel_type, loglevel_value,
+ filter_expression, agt);
+}
+
/*
* Get the next agent event duplicate by name. This should be called
* after a call to agent_find_events_by_name() to iterate on events.
* Return object if found else NULL.
*/
struct agent_event *agent_find_event(const char *name,
- enum lttng_loglevel_type loglevel_type, int loglevel_value,
- char *filter_expression, struct agent *agt)
+ enum lttng_loglevel_type loglevel_type,
+ int loglevel_value,
+ const char *filter_expression,
+ struct agent *agt)
{
struct lttng_ht_node_str *node;
struct lttng_ht_iter iter;
*/
int agent_app_ht_alloc(void)
{
- int ret = 0;
-
agent_apps_ht_by_sock = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
- if (!agent_apps_ht_by_sock) {
- ret = -1;
- }
-
- return ret;
+ return agent_apps_ht_by_sock ? 0 : -1;
}
/*
cds_lfht_for_each_entry(agt->events->ht, &iter.iter, event, node.node) {
/* Skip event if disabled. */
- if (!event->enabled) {
+ if (!AGENT_EVENT_IS_ENABLED(event)) {
continue;
}
rcu_read_unlock();
}
+
+/*
+ * Allocate the per-event notifier domain agent hash table. It is lazily
+ * populated as domains are used.
+ */
+int agent_by_event_notifier_domain_ht_create(void)
+{
+ trigger_agents_ht_by_domain = lttng_ht_new(0, LTTNG_HT_TYPE_U64);
+ return trigger_agents_ht_by_domain ? 0 : -1;
+}
+
+/*
+ * Clean-up the per-event notifier domain agent hash table and destroy it.
+ */
+void agent_by_event_notifier_domain_ht_destroy(void)
+{
+ struct lttng_ht_node_u64 *node;
+ struct lttng_ht_iter iter;
+
+ if (!trigger_agents_ht_by_domain) {
+ return;
+ }
+
+ rcu_read_lock();
+ cds_lfht_for_each_entry (trigger_agents_ht_by_domain->ht, &iter.iter,
+ node, node) {
+ struct agent *agent =
+ caa_container_of(node, struct agent, node);
+ const int ret = lttng_ht_del(
+ trigger_agents_ht_by_domain, &iter);
+
+ assert(ret == 0);
+ agent_destroy(agent);
+ }
+
+ rcu_read_unlock();
+ lttng_ht_destroy(trigger_agents_ht_by_domain);
+}
+
+struct agent *agent_find_by_event_notifier_domain(
+ enum lttng_domain_type domain_type)
+{
+ struct agent *agt = NULL;
+ struct lttng_ht_node_u64 *node;
+ struct lttng_ht_iter iter;
+ const uint64_t key = (uint64_t) domain_type;
+
+ assert(trigger_agents_ht_by_domain);
+
+ DBG3("Per-event notifier domain agent lookup for domain '%s'",
+ lttng_domain_type_str(domain_type));
+
+ lttng_ht_lookup(trigger_agents_ht_by_domain, &key, &iter);
+ node = lttng_ht_iter_get_node_u64(&iter);
+ if (!node) {
+ goto end;
+ }
+
+ agt = caa_container_of(node, struct agent, node);
+
+end:
+ return agt;
+}
projects / lttng-tools.git / blobdiff