#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>
urcu_ref_init(&trigger->ref);
+ trigger->firing_policy.type = LTTNG_TRIGGER_FIRING_POLICY_EVERY_N;
+ trigger->firing_policy.threshold = 1;
+
lttng_condition_get(condition);
trigger->condition = condition;
lttng_trigger_put(trigger);
}
+static bool is_firing_policy_valid(enum lttng_trigger_firing_policy policy)
+{
+ bool valid = false;
+
+ switch (policy) {
+ case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N:
+ case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N:
+ valid = true;
+ break;
+ default:
+ valid = false;
+ break;
+ }
+
+ return valid;
+}
+
LTTNG_HIDDEN
ssize_t lttng_trigger_create_from_payload(
struct lttng_payload_view *src_view,
- struct lttng_trigger **trigger)
+ struct lttng_trigger **_trigger)
{
ssize_t ret, offset = 0, condition_size, action_size, name_size = 0;
struct lttng_condition *condition = NULL;
struct lttng_action *action = NULL;
const struct lttng_trigger_comm *trigger_comm;
const char *name = NULL;
+ uint64_t firing_policy_threshold;
+ enum lttng_trigger_firing_policy firing_policy;
struct lttng_credentials creds = {
.uid = LTTNG_OPTIONAL_INIT_UNSET,
.gid = LTTNG_OPTIONAL_INIT_UNSET,
};
+ struct lttng_trigger *trigger = NULL;
const struct lttng_payload_view trigger_comm_view =
lttng_payload_view_from_view(
src_view, 0, sizeof(*trigger_comm));
- if (!src_view || !trigger) {
+ if (!src_view || !_trigger) {
ret = -1;
goto end;
}
offset += sizeof(*trigger_comm);
+ firing_policy = trigger_comm->firing_policy_type;
+ if (!is_firing_policy_valid(firing_policy)) {
+ ret =-1;
+ goto end;
+ }
+
+ firing_policy_threshold = trigger_comm->firing_policy_threshold;
if (trigger_comm->name_length != 0) {
/* Name. */
const struct lttng_payload_view name_view =
goto error;
}
- *trigger = lttng_trigger_create(condition, action);
- if (!*trigger) {
+ trigger = lttng_trigger_create(condition, action);
+ if (!trigger) {
ret = -1;
goto error;
}
- lttng_trigger_set_credentials(*trigger, &creds);
+ lttng_trigger_set_credentials(trigger, &creds);
/*
* The trigger object owns references to the action and condition
if (name) {
const enum lttng_trigger_status status =
- lttng_trigger_set_name(*trigger, name);
+ lttng_trigger_set_name(trigger, name);
+
+ if (status != LTTNG_TRIGGER_STATUS_OK) {
+ ret = -1;
+ goto end;
+ }
+ }
+
+ /* Set the policy. */
+ {
+ const enum lttng_trigger_status status =
+ lttng_trigger_set_firing_policy(trigger,
+ firing_policy,
+ firing_policy_threshold);
if (status != LTTNG_TRIGGER_STATUS_OK) {
ret = -1;
ret = offset;
error:
- lttng_condition_destroy(condition);
- lttng_action_destroy(action);
+ lttng_condition_put(condition);
+ lttng_action_put(action);
end:
+ if (ret >= 0) {
+ *_trigger = trigger;
+ } else {
+ lttng_trigger_put(trigger);
+ }
+
return ret;
}
}
trigger_comm.name_length = size_name;
+ trigger_comm.firing_policy_type = (uint8_t) trigger->firing_policy.type;
+ trigger_comm.firing_policy_threshold = (uint64_t) trigger->firing_policy.threshold;
header_offset = payload->buffer.size;
ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm,
bool lttng_trigger_is_equal(
const struct lttng_trigger *a, const struct lttng_trigger *b)
{
+ if (a->firing_policy.type != b->firing_policy.type) {
+ return false;
+ }
+
+ if (a->firing_policy.threshold != b->firing_policy.threshold) {
+ return false;
+ }
+
/*
* Name is not taken into account since it is cosmetic only.
*/
end:
return ret;
}
+
+enum lttng_trigger_status lttng_trigger_set_firing_policy(
+ struct lttng_trigger *trigger,
+ enum lttng_trigger_firing_policy policy_type,
+ uint64_t threshold)
+{
+ enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK;
+ assert(trigger);
+
+ if (threshold < 1) {
+ ret = LTTNG_TRIGGER_STATUS_INVALID;
+ goto end;
+ }
+
+ trigger->firing_policy.type = policy_type;
+ trigger->firing_policy.threshold = threshold;
+
+end:
+ return ret;
+}
+
+enum lttng_trigger_status lttng_trigger_get_firing_policy(
+ const struct lttng_trigger *trigger,
+ enum lttng_trigger_firing_policy *policy_type,
+ uint64_t *threshold)
+{
+ enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK;
+
+ if (!trigger || !policy_type || !threshold) {
+ status = LTTNG_TRIGGER_STATUS_INVALID;
+ goto end;
+ }
+
+ *policy_type = trigger->firing_policy.type;
+ *threshold = trigger->firing_policy.threshold;
+
+end:
+ return status;
+}
+
+LTTNG_HIDDEN
+bool lttng_trigger_should_fire(const struct lttng_trigger *trigger)
+{
+ bool ready_to_fire = false;
+
+ assert(trigger);
+
+ switch (trigger->firing_policy.type) {
+ case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N:
+ if (trigger->firing_policy.current_count < trigger->firing_policy.threshold) {
+ ready_to_fire = true;
+ }
+ break;
+ case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N:
+ if (trigger->firing_policy.current_count < trigger->firing_policy.threshold) {
+ ready_to_fire = true;
+ }
+ break;
+ default:
+ abort();
+ };
+
+ return ready_to_fire;
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_fire(struct lttng_trigger *trigger)
+{
+ assert(trigger);
+
+ trigger->firing_policy.current_count++;
+
+ switch (trigger->firing_policy.type) {
+ case LTTNG_TRIGGER_FIRING_POLICY_EVERY_N:
+ if (trigger->firing_policy.current_count == trigger->firing_policy.threshold) {
+ trigger->firing_policy.current_count = 0;
+ }
+
+ break;
+ case LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N:
+ /*
+ * TODO:
+ * As an optimisation, deactivate the trigger condition and
+ * remove any checks in the traced application or kernel since
+ * the trigger will never fire again.
+ */
+ break;
+ default:
+ 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;
+}
projects / lttng-tools.git / blobdiff