*
*/
-#include <lttng/trigger/trigger-internal.h>
-#include <lttng/condition/condition-internal.h>
-#include <lttng/action/action-internal.h>
+#include <assert.h>
#include <common/credentials.h>
-#include <common/payload.h>
-#include <common/payload-view.h>
-#include <common/error.h>
#include <common/dynamic-array.h>
+#include <common/error.h>
#include <common/optional.h>
-#include <assert.h>
+#include <common/payload-view.h>
+#include <common/payload.h>
#include <inttypes.h>
+#include <lttng/action/action-internal.h>
+#include <lttng/condition/buffer-usage.h>
+#include <lttng/condition/condition-internal.h>
+#include <lttng/condition/on-event-internal.h>
+#include <lttng/condition/on-event.h>
+#include <lttng/domain.h>
+#include <lttng/event-expr-internal.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/trigger/trigger-internal.h>
+#include <pthread.h>
LTTNG_HIDDEN
-bool lttng_trigger_validate(struct lttng_trigger *trigger)
+bool lttng_trigger_validate(const struct lttng_trigger *trigger)
{
bool valid;
lttng_action_get(action);
trigger->action = action;
+ pthread_mutex_init(&trigger->lock, NULL);
+ trigger->registered = false;
+
end:
return trigger;
}
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;
}
-
/*
* Note: the lack of reference counting 'get' on the action object is normal.
* This API was exposed as such in 2.11. The client is not expected to call
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)
lttng_action_put(action);
lttng_condition_put(condition);
+ pthread_mutex_destroy(&trigger->lock);
+
free(trigger->name);
free(trigger);
}
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;
.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;
+ }
+
+ if (!lttng_payload_view_is_valid(&trigger_comm_view)) {
+ /* Payload not large enough to contain the header. */
ret = -1;
goto end;
}
/* lttng_trigger_comm header */
- trigger_comm = (typeof(trigger_comm)) src_view->buffer.data;
+ trigger_comm = (typeof(trigger_comm)) trigger_comm_view.buffer.data;
/* Set the trigger's creds. */
if (trigger_comm->uid > (uint64_t) ((uid_t) -1)) {
/* Name. */
const struct lttng_payload_view name_view =
lttng_payload_view_from_view(
- src_view, offset, trigger_comm->name_length);
+ src_view, offset,
+ trigger_comm->name_length);
+
+ if (!lttng_payload_view_is_valid(&name_view)) {
+ ret = -1;
+ goto end;
+ }
name = name_view.buffer.data;
if (!lttng_buffer_view_contains_string(&name_view.buffer, name,
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;
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;
}
bool lttng_trigger_is_equal(
const struct lttng_trigger *a, const struct lttng_trigger *b)
{
- /*
- * Name is not taken into account since it is cosmetic only.
- */
+ if (strcmp(a->name, b->name) != 0) {
+ return false;
+ }
+
if (!lttng_condition_is_equal(a->condition, b->condition)) {
return false;
}
end:
return ret;
}
+
+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_ON_EVENT:
+ /* Return the domain of the event rule. */
+ c_status = lttng_condition_on_event_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_ON_EVENT:
+ {
+ struct lttng_event_rule *event_rule;
+ const enum lttng_condition_status condition_status =
+ lttng_condition_on_event_borrow_rule_mutable(
+ condition, &event_rule);
+
+ assert(condition_status == LTTNG_CONDITION_STATUS_OK);
+
+ /* Generate the filter bytecode. */
+ ret = lttng_event_rule_generate_filter_bytecode(
+ event_rule, creds);
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+
+ /* Generate the capture bytecode. */
+ ret = lttng_condition_on_event_generate_capture_descriptor_bytecode(
+ condition);
+ if (ret != LTTNG_OK) {
+ goto end;
+ }
+
+ ret = LTTNG_OK;
+ break;
+ }
+ default:
+ ret = LTTNG_OK;
+ break;
+ }
+end:
+ return ret;
+}
+
+LTTNG_HIDDEN
+struct lttng_trigger *lttng_trigger_copy(const struct lttng_trigger *trigger)
+{
+ int ret;
+ struct lttng_payload copy_buffer;
+ struct lttng_trigger *copy = NULL;
+
+ lttng_payload_init(©_buffer);
+
+ ret = lttng_trigger_serialize(trigger, ©_buffer);
+ if (ret < 0) {
+ goto end;
+ }
+
+ {
+ struct lttng_payload_view view =
+ lttng_payload_view_from_payload(
+ ©_buffer, 0, -1);
+ ret = lttng_trigger_create_from_payload(
+ &view, ©);
+ if (ret < 0) {
+ copy = NULL;
+ goto end;
+ }
+ }
+
+end:
+ lttng_payload_reset(©_buffer);
+ return copy;
+}
+
+LTTNG_HIDDEN
+bool lttng_trigger_needs_tracer_notifier(const struct lttng_trigger *trigger)
+{
+ bool needs_tracer_notifier = false;
+ const struct lttng_condition *condition =
+ lttng_trigger_get_const_condition(trigger);
+
+ switch (lttng_condition_get_type(condition)) {
+ case LTTNG_CONDITION_TYPE_ON_EVENT:
+ needs_tracer_notifier = true;
+ goto end;
+ case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
+ case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+ case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+ case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
+ case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
+ goto end;
+ case LTTNG_CONDITION_TYPE_UNKNOWN:
+ default:
+ abort();
+ }
+end:
+ return needs_tracer_notifier;
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_set_as_registered(struct lttng_trigger *trigger)
+{
+ pthread_mutex_lock(&trigger->lock);
+ trigger->registered = true;
+ pthread_mutex_unlock(&trigger->lock);
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_set_as_unregistered(struct lttng_trigger *trigger)
+{
+ pthread_mutex_lock(&trigger->lock);
+ trigger->registered = false;
+ pthread_mutex_unlock(&trigger->lock);
+}
+
+/*
+ * The trigger must be locked before calling lttng_trigger_registered.
+ * The lock is necessary since a trigger can be unregistered at anytime.
+ * Manipulations requiring that the trigger be registered must always acquire
+ * the trigger lock for the duration of the manipulation using
+ * `lttng_trigger_lock` and `lttng_trigger_unlock`.
+ */
+LTTNG_HIDDEN
+bool lttng_trigger_is_registered(struct lttng_trigger *trigger)
+{
+ ASSERT_LOCKED(trigger->lock);
+ return trigger->registered;
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_lock(struct lttng_trigger *trigger)
+{
+ pthread_mutex_lock(&trigger->lock);
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_unlock(struct lttng_trigger *trigger)
+{
+ pthread_mutex_unlock(&trigger->lock);
+}
projects / lttng-tools.git / blobdiff