X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Ftrigger.c;h=77f40af194bbe5fa764a9016ad53a766894e0a17;hp=5ff478a46f220c7815dd0f4db48343d7577e7690;hb=2463b7879c00298daa79744cdaae82ac061a4ed8;hpb=9e620ea7b016fc3fd4e08b5d094ffa40b36b50f6

diff --git a/src/common/trigger.c b/src/common/trigger.c
index 5ff478a46..77f40af19 100644
--- a/src/common/trigger.c
+++ b/src/common/trigger.c
@@ -7,14 +7,32 @@
 
 #include <lttng/trigger/trigger-internal.h>
 #include <lttng/condition/condition-internal.h>
+#include <lttng/condition/event-rule-internal.h>
+#include <lttng/condition/event-rule.h>
+#include <lttng/condition/buffer-usage.h>
+#include <lttng/event-rule/event-rule-internal.h>
+#include <lttng/event-expr-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>
 #include <assert.h>
+#include <inttypes.h>
 
+static void destroy_lttng_condition_event_rule_capture_bytecode_element(void *ptr)
+{
+	struct lttng_condition_event_rule_capture_bytecode_element *element =
+			ptr;
+	lttng_event_expr_destroy(element->expression);
+	free(element->bytecode);
+	free(element);
+}
 LTTNG_HIDDEN
-bool lttng_trigger_validate(struct lttng_trigger *trigger)
+bool lttng_trigger_validate(const struct lttng_trigger *trigger)
 {
 	bool valid;
 
@@ -23,6 +41,11 @@ bool lttng_trigger_validate(struct lttng_trigger *trigger)
 		goto end;
 	}
 
+	if (!trigger->creds.uid.is_set) {
+		valid = false;
+		goto end;
+	}
+
 	valid = lttng_condition_validate(trigger->condition) &&
 			lttng_action_validate(trigger->action);
 end:
@@ -44,45 +67,101 @@ struct lttng_trigger *lttng_trigger_create(
 		goto end;
 	}
 
+	urcu_ref_init(&trigger->ref);
+
+	trigger->firing_policy.type = LTTNG_TRIGGER_FIRE_EVERY_N;
+	trigger->firing_policy.threshold = 1;
+	lttng_trigger_set_error_count(trigger, 0);
+
+	lttng_condition_get(condition);
 	trigger->condition = condition;
+
+	lttng_action_get(action);
 	trigger->action = action;
+
+	lttng_dynamic_pointer_array_init(&trigger->capture_bytecode_set,
+			destroy_lttng_condition_event_rule_capture_bytecode_element);
+
 end:
 	return trigger;
 }
 
+/*
+ * Note: the lack of reference counting 'get' on the condition object is normal.
+ * This API was exposed as such in 2.11. The client is not expected to call
+ * lttng_condition_destroy on the returned object.
+ */
 struct lttng_condition *lttng_trigger_get_condition(
 		struct lttng_trigger *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
+ * lttng_action_destroy on the returned object.
+ */
 struct lttng_action *lttng_trigger_get_action(
 		struct lttng_trigger *trigger)
 {
 	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)
+{
+	struct lttng_trigger *trigger =
+			container_of(ref, struct lttng_trigger, ref);
+	struct lttng_action *action = lttng_trigger_get_action(trigger);
+	struct lttng_condition *condition =
+			lttng_trigger_get_condition(trigger);
+
+	lttng_dynamic_pointer_array_reset(&trigger->capture_bytecode_set);
+
+	assert(action);
+	assert(condition);
+
+	/* Release ownership. */
+	lttng_action_put(action);
+	lttng_condition_put(condition);
+
+	free(trigger->name);
+	free(trigger);
 }
 
 void lttng_trigger_destroy(struct lttng_trigger *trigger)
 {
-	if (!trigger) {
-		return;
+	lttng_trigger_put(trigger);
+}
+
+static bool is_firing_policy_valid(enum lttng_trigger_firing_policy_type policy)
+{
+	bool valid = false;
+
+	switch (policy) {
+	case LTTNG_TRIGGER_FIRE_EVERY_N:
+	case LTTNG_TRIGGER_FIRE_ONCE_AFTER_N:
+		valid = true;
+		break;
+	default:
+		valid = false;
+		break;
 	}
 
-	free(trigger);
+	return valid;
 }
 
 LTTNG_HIDDEN
@@ -90,10 +169,19 @@ ssize_t lttng_trigger_create_from_payload(
 		struct lttng_payload_view *src_view,
 		struct lttng_trigger **trigger)
 {
-	ssize_t ret, offset = 0, condition_size, action_size;
+	ssize_t ret, offset = 0, condition_size, action_size, name_size = 0;
+	enum lttng_trigger_status status;
 	struct lttng_condition *condition = NULL;
 	struct lttng_action *action = NULL;
 	const struct lttng_trigger_comm *trigger_comm;
+	const char *name = NULL;
+	uint64_t firing_threshold;
+	int64_t error_count;
+	enum lttng_trigger_firing_policy_type firing_policy;
+	struct lttng_credentials creds = {
+		.uid = LTTNG_OPTIONAL_INIT_UNSET,
+		.gid = LTTNG_OPTIONAL_INIT_UNSET,
+	};
 
 	if (!src_view || !trigger) {
 		ret = -1;
@@ -102,7 +190,35 @@ ssize_t lttng_trigger_create_from_payload(
 
 	/* lttng_trigger_comm header */
 	trigger_comm = (typeof(trigger_comm)) src_view->buffer.data;
+
+	/* Get the trigger creds */
+	LTTNG_OPTIONAL_SET(&creds.uid, trigger_comm->uid);
+
 	offset += sizeof(*trigger_comm);
+
+	firing_policy = trigger_comm->policy_type;
+	if (!is_firing_policy_valid(firing_policy)) {
+		ret =-1;
+		goto end;
+	}
+
+	firing_threshold = trigger_comm->policy_threshold;
+	error_count = trigger_comm->error_count;
+	if (trigger_comm->name_length != 0) {
+		/* Name */
+		struct lttng_payload_view name_view =
+				lttng_payload_view_from_view(
+						src_view, offset, trigger_comm->name_length);
+
+		name = name_view.buffer.data;
+		if (!lttng_buffer_view_contains_string(&name_view.buffer, name, trigger_comm->name_length)){
+			ret = -1;
+			goto end;
+		}
+		offset += trigger_comm->name_length;
+		name_size = trigger_comm->name_length;
+	}
+
 	{
 		/* struct lttng_condition */
 		struct lttng_payload_view condition_view =
@@ -135,7 +251,7 @@ ssize_t lttng_trigger_create_from_payload(
 	offset += action_size;
 
 	/* Unexpected size of inner-elements; the buffer is corrupted. */
-	if ((ssize_t) trigger_comm->length != condition_size + action_size) {
+	if ((ssize_t) trigger_comm->length != condition_size + action_size + name_size) {
 		ret = -1;
 		goto error;
 	}
@@ -146,12 +262,40 @@ ssize_t lttng_trigger_create_from_payload(
 		goto error;
 	}
 
+	lttng_trigger_set_credentials(*trigger, &creds);
+
+	/*
+	 * The trigger object owns references to the action and condition
+	 * objects.
+	 */
+	lttng_condition_put(condition);
+	condition = NULL;
+
+	lttng_action_put(action);
+	action = NULL;
+
+	if (name) {
+		status = lttng_trigger_set_name(*trigger, name);
+		if (status != LTTNG_TRIGGER_STATUS_OK) {
+			ret = -1;
+			goto end;
+		}
+	}
+
+	status = lttng_trigger_set_firing_policy(*trigger, firing_policy, firing_threshold);
+	if (status != LTTNG_TRIGGER_STATUS_OK) {
+		ret = -1;
+		goto end;
+	}
+
+	lttng_trigger_set_error_count(*trigger, error_count);
+
 	ret = offset;
-end:
-	return ret;
+
 error:
 	lttng_condition_destroy(condition);
 	lttng_action_destroy(action);
+end:
 	return ret;
 }
 
@@ -160,13 +304,30 @@ error:
  * for the detailed format.
  */
 LTTNG_HIDDEN
-int lttng_trigger_serialize(struct lttng_trigger *trigger,
+int lttng_trigger_serialize(const struct lttng_trigger *trigger,
 		struct lttng_payload *payload)
 {
 	int ret;
-	size_t header_offset, size_before_payload;
+	size_t header_offset, size_before_payload, size_name;
 	struct lttng_trigger_comm trigger_comm = {};
 	struct lttng_trigger_comm *header;
+	const struct lttng_credentials *creds = NULL;
+
+	creds = lttng_trigger_get_credentials(trigger);
+	assert(creds);
+
+	trigger_comm.uid = LTTNG_OPTIONAL_GET(creds->uid);
+
+	if (trigger->name != NULL) {
+		size_name = strlen(trigger->name) + 1;
+	} else {
+		size_name = 0;
+	}
+
+	trigger_comm.name_length = size_name;
+	trigger_comm.policy_type = (uint8_t) trigger->firing_policy.type;
+	trigger_comm.policy_threshold = (uint64_t) trigger->firing_policy.threshold;
+	trigger_comm.error_count = (int64_t) lttng_trigger_get_error_count(trigger);
 
 	header_offset = payload->buffer.size;
 	ret = lttng_dynamic_buffer_append(&payload->buffer, &trigger_comm,
@@ -176,6 +337,14 @@ int lttng_trigger_serialize(struct lttng_trigger *trigger,
 	}
 
 	size_before_payload = payload->buffer.size;
+
+	/* Trigger name */
+	ret = lttng_dynamic_buffer_append(
+			&payload->buffer, trigger->name, size_name);
+	if (ret) {
+		goto end;
+	}
+
 	ret = lttng_condition_serialize(trigger->condition, payload);
 	if (ret) {
 		goto end;
@@ -192,3 +361,645 @@ int lttng_trigger_serialize(struct lttng_trigger *trigger,
 end:
 	return ret;
 }
+
+enum lttng_trigger_status lttng_trigger_set_name(struct lttng_trigger *trigger, const char* name)
+{
+	char *name_copy = NULL;
+	enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK;
+
+	if (!trigger || !name ||
+			strlen(name) == 0) {
+		status = LTTNG_TRIGGER_STATUS_INVALID;
+		goto end;
+	}
+
+	name_copy = strdup(name);
+	if (!name_copy) {
+		status = LTTNG_TRIGGER_STATUS_ERROR;
+		goto end;
+	}
+
+	free(trigger->name);
+
+	trigger->name = name_copy;
+	name_copy = NULL;
+end:
+	return status;
+}
+
+enum lttng_trigger_status lttng_trigger_get_name(
+		const struct lttng_trigger *trigger, const char **name)
+{
+	enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK;
+
+	if (!trigger || !name) {
+		status = LTTNG_TRIGGER_STATUS_INVALID;
+		goto end;
+	}
+
+	if (!trigger->name) {
+		status = LTTNG_TRIGGER_STATUS_UNSET;
+	}
+
+	*name = trigger->name;
+end:
+	return status;
+}
+
+LTTNG_HIDDEN
+int lttng_trigger_assign_name(struct lttng_trigger *dst,
+		const struct lttng_trigger *src)
+{
+	int ret = 0;
+	enum lttng_trigger_status status;
+
+	status = lttng_trigger_set_name(dst, src->name);
+	if (status != LTTNG_TRIGGER_STATUS_OK) {
+		ret = -1;
+		ERR("Failed to set name for trigger");
+		goto end;
+	}
+end:
+	return ret;
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_set_tracer_token(struct lttng_trigger *trigger, uint64_t token)
+{
+	assert(trigger);
+	LTTNG_OPTIONAL_SET(&trigger->tracer_token, token);
+}
+
+LTTNG_HIDDEN
+uint64_t lttng_trigger_get_tracer_token(const struct lttng_trigger *trigger)
+{
+	assert(trigger);
+
+	return LTTNG_OPTIONAL_GET(trigger->tracer_token);
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_set_error_counter_index(struct lttng_trigger *trigger,
+		uint64_t error_counter_index)
+{
+	assert(trigger);
+	LTTNG_OPTIONAL_SET(&trigger->error_counter_index, error_counter_index);
+}
+
+LTTNG_HIDDEN
+uint64_t lttng_trigger_get_error_counter_index(
+		const struct lttng_trigger *trigger)
+{
+	assert(trigger);
+
+	return LTTNG_OPTIONAL_GET(trigger->error_counter_index);
+}
+
+LTTNG_HIDDEN
+int lttng_trigger_generate_name(struct lttng_trigger *trigger, uint64_t offset)
+{
+	int ret = 0;
+	char *generated_name = NULL;
+
+	ret = asprintf(&generated_name, "T%" PRIu64 "", offset);
+	if (ret < 0) {
+		ERR("Failed to generate trigger name");
+		ret = -1;
+		goto end;
+	}
+
+	free(trigger->name);
+	trigger->name = generated_name;
+end:
+	return ret;
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_get(struct lttng_trigger *trigger)
+{
+	urcu_ref_get(&trigger->ref);
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_put(struct lttng_trigger *trigger)
+{
+	if (!trigger) {
+		return;
+	}
+
+	urcu_ref_put(&trigger->ref , trigger_destroy_ref);
+}
+
+static void delete_trigger_array_element(void *ptr)
+{
+	struct lttng_trigger *trigger = ptr;
+	lttng_trigger_put(trigger);
+}
+
+LTTNG_HIDDEN
+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.
+	 */
+	if (!lttng_condition_is_equal(a->condition, b->condition)) {
+		return false;
+	}
+
+	if (!lttng_action_is_equal(a->action, b->action)) {
+		return false;
+	}
+
+	if (!lttng_credentials_is_equal(lttng_trigger_get_credentials(a),
+			lttng_trigger_get_credentials(b))) {
+		return false;
+	}
+
+	return true;
+}
+
+LTTNG_HIDDEN
+struct lttng_triggers *lttng_triggers_create(void)
+{
+	struct lttng_triggers *triggers = NULL;
+
+	triggers = zmalloc(sizeof(*triggers));
+	if (!triggers) {
+		goto end;
+	}
+
+	lttng_dynamic_pointer_array_init(&triggers->array, delete_trigger_array_element);
+
+end:
+	return triggers;
+}
+
+LTTNG_HIDDEN
+struct lttng_trigger *lttng_triggers_get_pointer_of_index(
+		const struct lttng_triggers *triggers, unsigned int index)
+{
+	struct lttng_trigger *trigger = NULL;
+	assert(triggers);
+	if (index >= lttng_dynamic_pointer_array_get_count(&triggers->array)) {
+		goto end;
+	}
+
+	trigger = (struct lttng_trigger *)
+			lttng_dynamic_pointer_array_get_pointer(
+					&triggers->array, index);
+end:
+	return trigger;
+}
+
+LTTNG_HIDDEN
+int lttng_triggers_add(
+		struct lttng_triggers *triggers, struct lttng_trigger *trigger)
+{
+	int ret;
+
+	assert(triggers);
+	assert(trigger);
+
+	lttng_trigger_get(trigger);
+
+	ret = lttng_dynamic_pointer_array_add_pointer(&triggers->array, trigger);
+	if (ret) {
+		lttng_trigger_put(trigger);
+	}
+
+	return ret;
+}
+
+const struct lttng_trigger *lttng_triggers_get_at_index(
+		const struct lttng_triggers *triggers, unsigned int index)
+{
+	assert(triggers);
+	return lttng_triggers_get_pointer_of_index(triggers, index);
+}
+
+enum lttng_trigger_status lttng_triggers_get_count(const struct lttng_triggers *triggers, unsigned int *count)
+{
+	enum lttng_trigger_status status = LTTNG_TRIGGER_STATUS_OK;
+
+	if (!triggers || !count) {
+		status = LTTNG_TRIGGER_STATUS_INVALID;
+		goto end;
+	}
+
+	*count = lttng_dynamic_pointer_array_get_count(&triggers->array);
+end:
+	return status;
+}
+
+void lttng_triggers_destroy(struct lttng_triggers *triggers)
+{
+	if (!triggers) {
+		return;
+	}
+
+	lttng_dynamic_pointer_array_reset(&triggers->array);
+	free(triggers);
+}
+
+int lttng_triggers_serialize(const struct lttng_triggers *triggers,
+		struct lttng_payload *payload)
+{
+	int ret;
+	unsigned int count;
+	size_t header_offset, size_before_payload;
+	struct lttng_triggers_comm triggers_comm = {};
+	struct lttng_triggers_comm *header;
+	enum lttng_trigger_status status;
+
+	header_offset = payload->buffer.size;
+
+	status = lttng_triggers_get_count(triggers, &count);
+	if (status != LTTNG_TRIGGER_STATUS_OK) {
+		ret = LTTNG_ERR_INVALID;
+		goto end;
+	}
+
+	triggers_comm.count = count;
+
+	ret = lttng_dynamic_buffer_append(&payload->buffer, &triggers_comm,
+			sizeof(triggers_comm));
+	if (ret) {
+		goto end;
+	}
+
+	size_before_payload = payload->buffer.size;
+
+	for (int i = 0; i < count; i++) {
+		const struct lttng_trigger *trigger =
+				lttng_triggers_get_at_index(triggers, i);
+		assert(trigger);
+
+		ret = lttng_trigger_serialize(trigger, payload);
+		if (ret) {
+			goto end;
+		}
+	}
+
+	/* Update payload size. */
+	header = (struct lttng_triggers_comm *) ((char *) payload->buffer.data + header_offset);
+	header->length = payload->buffer.size - size_before_payload;
+end:
+	return ret;
+}
+
+LTTNG_HIDDEN
+ssize_t lttng_triggers_create_from_payload(
+		struct lttng_payload_view *src_view,
+		struct lttng_triggers **triggers)
+{
+	ssize_t ret, offset = 0, trigger_size, triggers_size = 0;
+	const struct lttng_triggers_comm *triggers_comm;
+	struct lttng_triggers *local_triggers = NULL;
+
+	if (!src_view || !triggers) {
+		ret = -1;
+		goto error;
+	}
+
+	/* lttng_trigger_comms header */
+	triggers_comm = (const struct lttng_triggers_comm *) src_view->buffer.data;
+	offset += sizeof(*triggers_comm);
+
+	local_triggers = lttng_triggers_create();
+	if (!local_triggers) {
+		ret = -1;
+		goto error;
+	}
+
+	for (int i = 0; i < triggers_comm->count; i++) {
+		struct lttng_trigger *trigger = NULL;
+		struct lttng_payload_view trigger_view =
+			lttng_payload_view_from_view(src_view, offset, -1);
+		trigger_size = lttng_trigger_create_from_payload(&trigger_view,
+				&trigger);
+		if (trigger_size  < 0) {
+			ret = trigger_size;
+			goto error;
+		}
+
+		/* Pass ownership of the trigger to the collection */
+		ret = lttng_triggers_add(local_triggers, trigger);
+		lttng_trigger_put(trigger);
+		if (ret < 0) {
+			ret = -1;
+			goto error;
+		}
+
+		offset += trigger_size;
+		triggers_size += trigger_size;
+	}
+
+	/* Unexpected size of inner-elements; the buffer is corrupted. */
+	if ((ssize_t) triggers_comm->length != triggers_size) {
+		ret = -1;
+		goto error;
+	}
+
+	/* Pass ownership to caller */
+	*triggers = local_triggers;
+	local_triggers = NULL;
+
+	ret = offset;
+error:
+
+	lttng_triggers_destroy(local_triggers);
+	return ret;
+}
+
+LTTNG_HIDDEN
+const struct lttng_credentials *lttng_trigger_get_credentials(
+		const struct lttng_trigger *trigger)
+{
+	return &trigger->creds;
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_set_credentials(struct lttng_trigger *trigger,
+		const struct lttng_credentials *creds)
+{
+	assert(creds);
+	trigger->creds = *creds;
+}
+
+enum lttng_trigger_status lttng_trigger_set_user_identity(
+		struct lttng_trigger *trigger, uid_t uid)
+{
+	enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK;
+	struct lttng_credentials creds = {
+		.uid = LTTNG_OPTIONAL_INIT_UNSET,
+		.gid = LTTNG_OPTIONAL_INIT_UNSET,
+	};
+
+	if (!trigger) {
+		ret = LTTNG_TRIGGER_STATUS_INVALID;
+		goto end;
+	}
+
+	if (geteuid() != 0) {
+		ret = LTTNG_TRIGGER_STATUS_EPERM;
+		goto end;
+	}
+
+	LTTNG_OPTIONAL_SET(&creds.uid, uid);
+
+	lttng_trigger_set_credentials(trigger, &creds);
+
+end:
+	return ret;
+}
+
+enum lttng_trigger_status lttng_trigger_get_user_identity(
+		const struct lttng_trigger *trigger, uid_t *uid)
+{
+	enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK;
+	const struct lttng_credentials *creds = NULL;
+
+	if (!trigger || !uid ) {
+		ret = LTTNG_TRIGGER_STATUS_INVALID;
+		goto end;
+	}
+
+	if (!trigger->creds.uid.is_set ) {
+		ret = LTTNG_TRIGGER_STATUS_UNSET;
+		goto end;
+	}
+
+	creds = lttng_trigger_get_credentials(trigger);
+	*uid = lttng_credentials_get_uid(creds);
+
+end:
+	return ret;
+}
+
+LTTNG_HIDDEN
+uint64_t lttng_trigger_get_error_count(
+		const struct lttng_trigger *trigger)
+{
+	return LTTNG_OPTIONAL_GET(trigger->error_count);
+}
+
+LTTNG_HIDDEN
+void lttng_trigger_set_error_count(
+		struct lttng_trigger *trigger,
+		uint64_t error_count)
+{
+	LTTNG_OPTIONAL_SET(&trigger->error_count, error_count);
+}
+
+enum lttng_trigger_status lttng_trigger_set_firing_policy(
+		struct lttng_trigger *trigger,
+		enum lttng_trigger_firing_policy_type 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_type *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)
+{
+	assert(trigger);
+	bool ready_to_fire = false;
+
+	switch (trigger->firing_policy.type) {
+	case LTTNG_TRIGGER_FIRE_EVERY_N:
+		if (trigger->firing_policy.current_count < trigger->firing_policy.threshold) {
+			ready_to_fire = true;
+		}
+		break;
+	case LTTNG_TRIGGER_FIRE_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_FIRE_EVERY_N:
+		if (trigger->firing_policy.current_count == trigger->firing_policy.threshold) {
+			trigger->firing_policy.current_count = 0;
+		}
+		break;
+	case LTTNG_TRIGGER_FIRE_ONCE_AFTER_N:
+			/*
+			 * TODO: deactivate the trigger condition on
+			 * remove any work overhead on 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);
+	if (c_type == LTTNG_CONDITION_TYPE_UNKNOWN) {
+		assert(0);
+	}
+
+	switch (c_type) {
+	case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
+	case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
+	case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
+		type = LTTNG_DOMAIN_NONE;
+		break;
+	case LTTNG_CONDITION_TYPE_EVENT_RULE_HIT:
+		c_status = lttng_condition_event_rule_get_rule(
+				trigger->condition, &event_rule);
+		if (c_status != LTTNG_CONDITION_STATUS_OK) {
+			/* The condition object is invalid */
+			assert(0);
+		}
+
+		type = lttng_event_rule_get_domain_type(event_rule);
+		break;
+	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
+	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
+		c_status = lttng_condition_buffer_usage_get_domain_type(
+				trigger->condition, &type);
+		if (c_status != LTTNG_CONDITION_STATUS_OK) {
+			/* The condition object is invalid */
+			assert(0);
+		}
+		break;
+	default:
+		type = LTTNG_DOMAIN_NONE;
+		break;
+	}
+
+	return type;
+}
+
+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(&copy_buffer);
+
+	ret = lttng_trigger_serialize(trigger, &copy_buffer);
+	if (ret < 0) {
+		goto end;
+	}
+
+	{
+		struct lttng_payload_view view =
+				lttng_payload_view_from_payload(
+						&copy_buffer, 0, -1);
+		ret = lttng_trigger_create_from_payload(
+				&view, &copy);
+		if (ret < 0) {
+			copy = NULL;
+			goto end;
+		}
+	}
+
+end:
+	lttng_payload_reset(&copy_buffer);
+	return copy;
+}
+
+LTTNG_HIDDEN
+unsigned int lttng_trigger_get_capture_bytecode_count(
+		const struct lttng_trigger *trigger)
+{
+	unsigned int count = 0;
+	if (!trigger) {
+		goto end;
+	}
+
+	count = lttng_dynamic_pointer_array_get_count(
+			&trigger->capture_bytecode_set);
+
+end:
+	return count;
+}
+
+LTTNG_HIDDEN
+const struct lttng_bytecode *
+lttng_trigger_get_capture_bytecode_at_index(
+		const struct lttng_trigger *trigger, unsigned int index)
+{
+	struct lttng_condition_event_rule_capture_bytecode_element *element = NULL;
+	struct lttng_bytecode *bytecode = NULL;
+
+	element = lttng_dynamic_pointer_array_get_pointer(
+			&trigger->capture_bytecode_set, index);
+
+	if (element == NULL) {
+		goto end;
+	}
+	bytecode = element->bytecode;
+end:
+	return bytecode;
+}