[lttng-tools.git] / tests / regression / tools / notification / base_client.c

/*
 * base_client.c
 *
 * Base client application for testing of LTTng notification API
 *
 * Copyright 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
 *
 * SPDX-License-Identifier: MIT
 *
 */

#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <assert.h>

#include <lttng/action/action.h>
#include <lttng/action/group.h>
#include <lttng/action/notify.h>
#include <lttng/condition/buffer-usage.h>
#include <lttng/condition/condition.h>
#include <lttng/condition/evaluation.h>
#include <lttng/domain.h>
#include <lttng/endpoint.h>
#include <lttng/notification/channel.h>
#include <lttng/notification/notification.h>
#include <lttng/trigger/trigger.h>
#include <lttng/lttng-error.h>

static unsigned int nr_notifications = 0;
static unsigned int nr_expected_notifications = 0;
static const char *session_name = NULL;
static const char *channel_name = NULL;
static double threshold_ratio = 0.0;
static uint64_t threshold_bytes = 0;
static bool is_threshold_ratio = false;
static bool use_action_group = false;
static enum lttng_condition_type buffer_usage_type = LTTNG_CONDITION_TYPE_UNKNOWN;
static enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE;

int handle_condition(
		const struct lttng_condition *condition,
		const struct lttng_evaluation *condition_evaluation);

static
int parse_arguments(char **argv)
{
	int sscanf_ret;
	const char *domain_type_string = NULL;
	const char *buffer_usage_type_string = NULL;
	const char *buffer_usage_threshold_type = NULL;
	const char *buffer_usage_threshold_value = NULL;
	const char *nr_expected_notifications_string = NULL;
	const char *use_action_group_value = NULL;

	session_name = argv[1];
	channel_name = argv[2];
	domain_type_string = argv[3];
	buffer_usage_type_string = argv[4];
	buffer_usage_threshold_type = argv[5];
	buffer_usage_threshold_value = argv[6];
	nr_expected_notifications_string = argv[7];
	use_action_group_value = argv[8];

	/* Parse arguments */
	/* Domain type */
	if (!strcasecmp("LTTNG_DOMAIN_UST", domain_type_string)) {
		domain_type = LTTNG_DOMAIN_UST;
	}
	if (!strcasecmp("LTTNG_DOMAIN_KERNEL", domain_type_string)) {
		domain_type = LTTNG_DOMAIN_KERNEL;
	}
	if (domain_type == LTTNG_DOMAIN_NONE) {
		printf("error: Unknown domain type\n");
		goto error;
	}

	/* Buffer usage condition type */
	if (!strcasecmp("low", buffer_usage_type_string)) {
		buffer_usage_type = LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW;
	}
	if (!strcasecmp("high", buffer_usage_type_string)) {
		buffer_usage_type = LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH;
	}
	if (buffer_usage_type == LTTNG_CONDITION_TYPE_UNKNOWN) {
		printf("error: Unknown condition type\n");
		goto error;
	}

	/* Ratio or bytes ? */
	if (!strcasecmp("bytes", buffer_usage_threshold_type)) {
		is_threshold_ratio = false;
		sscanf(buffer_usage_threshold_value, "%" SCNu64, &threshold_bytes);
	}

	if (!strcasecmp("ratio", buffer_usage_threshold_type)) {
		is_threshold_ratio = true;
		sscanf(buffer_usage_threshold_value, "%lf", &threshold_ratio);
	}

	/* Number of notification to expect */
	sscanf_ret = sscanf(nr_expected_notifications_string, "%d",
			&nr_expected_notifications);
	if (sscanf_ret != 1) {
		printf("error: Invalid nr_expected_notifications, sscanf returned %d\n",
				sscanf_ret);
		goto error;
	}

	/* Put notify action in a group. */
	if (!strcasecmp("1", use_action_group_value)) {
		use_action_group = true;
	}

	return 0;
error:
	return 1;
}

int main(int argc, char **argv)
{
	int ret = 0;
	enum lttng_condition_status condition_status;
	enum lttng_action_status action_status;
	enum lttng_notification_channel_status nc_status;
	struct lttng_notification_channel *notification_channel = NULL;
	struct lttng_condition *condition = NULL;
	struct lttng_action *action = NULL;
	struct lttng_trigger *trigger = NULL;

	/*
	 * Disable buffering on stdout.
	 * Safety measure to prevent hang on the validation side since
	 * stdout is used for outside synchronization.
	 */
	setbuf(stdout, NULL);

	if (argc < 9) {
		printf("error: Missing arguments for tests\n");
		ret = 1;
		goto end;
	}

	ret = parse_arguments(argv);
	if (ret) {
		printf("error: Could not parse arguments\n");
		goto end;
	}

	/* Setup */
	notification_channel = lttng_notification_channel_create(
			lttng_session_daemon_notification_endpoint);
	if (!notification_channel) {
		printf("error: Could not create notification channel\n");
		ret = 1;
		goto end;
	}

	switch (buffer_usage_type) {
	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
		condition = lttng_condition_buffer_usage_low_create();
		break;
	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
		condition = lttng_condition_buffer_usage_high_create();
		break;
	default:
		printf("error: Invalid buffer_usage_type\n");
		ret = 1;
		goto end;
	}

	if (!condition) {
		printf("error: Could not create condition object\n");
		ret = 1;
		goto end;
	}

	if (is_threshold_ratio) {
		condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
				condition, threshold_ratio);
	} else {
		condition_status = lttng_condition_buffer_usage_set_threshold(
				condition, threshold_bytes);
	}

	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		printf("error: Could not set threshold\n");
		ret = 1;
		goto end;
	}

	condition_status = lttng_condition_buffer_usage_set_session_name(
			condition, session_name);
	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		printf("error: Could not set session name\n");
		ret = 1;
		goto end;
	}
	condition_status = lttng_condition_buffer_usage_set_channel_name(
			condition, channel_name);
	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		printf("error: Could not set channel name\n");
		ret = 1;
		goto end;
	}
	condition_status = lttng_condition_buffer_usage_set_domain_type(
			condition, domain_type);
	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
		printf("error: Could not set domain type\n");
		ret = 1;
		goto end;
	}

	if (use_action_group) {
		struct lttng_action *notify, *group;

		group = lttng_action_group_create();
		if (!group) {
			printf("error: Could not create action group\n");
			ret = 1;
			goto end;
		}

		notify = lttng_action_notify_create();
		if (!notify) {
			lttng_action_destroy(group);
			printf("error: Could not create action notify\n");
			ret = 1;
			goto end;
		}

		action_status = lttng_action_group_add_action(group, notify);
		if (action_status != LTTNG_ACTION_STATUS_OK) {
			printf("error: Could not add action notify to action group\n");
			lttng_action_destroy(group);
			lttng_action_destroy(notify);
			ret = 1;
			goto end;
		}

		action = group;
	} else {
		action = lttng_action_notify_create();
		if (!action) {
			printf("error: Could not create action notify\n");
			ret = 1;
			goto end;
		}
	}

	trigger = lttng_trigger_create(condition, action);
	if (!trigger) {
		printf("error: Could not create trigger\n");
		ret = 1;
		goto end;
	}

	ret = lttng_register_trigger(trigger);

	/*
	 * An equivalent trigger might already be registered if an other app
	 * registered an equivalent trigger.
	 */
	if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) {
		printf("error: %s\n", lttng_strerror(ret));
		ret = 1;
		goto end;
	}

	nc_status = lttng_notification_channel_subscribe(notification_channel, condition);
	if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
		printf("error: Could not subscribe\n");
		ret = 1;
		goto end;
	}

	/* Tell outside process that the client is ready */
	printf("sync: ready\n");

	for (;;) {
		struct lttng_notification *notification;
		enum lttng_notification_channel_status status;
		const struct lttng_evaluation *notification_evaluation;
		const struct lttng_condition *notification_condition;

		if (nr_notifications == nr_expected_notifications) {
			ret = 0;
			goto end;
		}
		/* Receive the next notification. */
		status = lttng_notification_channel_get_next_notification(
				notification_channel,
				&notification);

		switch (status) {
		case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK:
			break;
		case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED:
			ret = 1;
			printf("error: No drop should be observed during this test app\n");
			goto end;
		case LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED:
			/*
			 * The notification channel has been closed by the
			 * session daemon. This is typically caused by a session
			 * daemon shutting down (cleanly or because of a crash).
			 */
			printf("error: Notification channel was closed\n");
			ret = 1;
			goto end;
		default:
			/* Unhandled conditions / errors. */
			printf("error: Unknown notification channel status (%d) \n", status);
			ret = 1;
			goto end;
		}

		notification_condition = lttng_notification_get_condition(notification);
		notification_evaluation = lttng_notification_get_evaluation(notification);

		ret = handle_condition(notification_condition, notification_evaluation);
		nr_notifications++;

		lttng_notification_destroy(notification);
		if (ret != 0) {
			goto end;
		}
	}
end:
	if (trigger) {
		lttng_unregister_trigger(trigger);
	}
	if (lttng_notification_channel_unsubscribe(notification_channel, condition)) {
		printf("error: channel unsubscribe error\n");
	}
	lttng_trigger_destroy(trigger);
	lttng_condition_destroy(condition);
	lttng_action_destroy(action);
	lttng_notification_channel_destroy(notification_channel);
	printf("exit: %d\n", ret);
	return ret;
}

int handle_condition(
		const struct lttng_condition *condition,
		const struct lttng_evaluation *evaluation)
{
	int ret = 0;
	const char *string_low = "low";
	const char *string_high = "high";
	const char *string_condition_type = NULL;
	const char *condition_session_name = NULL;
	const char *condition_channel_name = NULL;
	enum lttng_condition_type condition_type;
	enum lttng_domain_type condition_domain_type;
	double buffer_usage_ratio;
	uint64_t buffer_usage_bytes;

	condition_type = lttng_condition_get_type(condition);

	if (condition_type != buffer_usage_type) {
		ret = 1;
		printf("error: condition type and buffer usage type are not the same\n");
		goto end;
	}

	/* Fetch info to test */
	ret = lttng_condition_buffer_usage_get_session_name(condition,
			&condition_session_name);
	if (ret) {
		printf("error: session name could not be fetched\n");
		ret = 1;
		goto end;
	}
	ret = lttng_condition_buffer_usage_get_channel_name(condition,
			&condition_channel_name);
	if (ret) {
		printf("error: channel name could not be fetched\n");
		ret = 1;
		goto end;
	}
	ret = lttng_condition_buffer_usage_get_domain_type(condition,
			&condition_domain_type);
	if (ret) {
		printf("error: domain type could not be fetched\n");
		ret = 1;
		goto end;
	}

	if (strcmp(condition_session_name, session_name) != 0) {
		printf("error: session name differs\n");
		ret = 1;
		goto end;
	}

	if (strcmp(condition_channel_name, channel_name) != 0) {
		printf("error: channel name differs\n");
		ret = 1;
		goto end;
	}

	if (condition_domain_type != domain_type) {
		printf("error: domain type differs\n");
		ret = 1;
		goto end;
	}

	if (is_threshold_ratio) {
		lttng_evaluation_buffer_usage_get_usage_ratio(
				evaluation, &buffer_usage_ratio);
		switch (condition_type) {
		case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
			if (buffer_usage_ratio > threshold_ratio) {
				printf("error: buffer usage ratio is bigger than set threshold ratio\n");
				ret = 1;
				goto end;
			}
			break;
		case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
			if (buffer_usage_ratio < threshold_ratio) {
				printf("error: buffer usage ratio is lower than set threshold ratio\n");
				ret = 1;
				goto end;
			}
			break;
		default:
			printf("error: Unknown condition type\n");
			ret = 1;
			goto end;
		}
	} else {
		lttng_evaluation_buffer_usage_get_usage(
				evaluation, &buffer_usage_bytes);
		switch (condition_type) {
		case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
			if (buffer_usage_bytes > threshold_bytes) {
				printf("error: buffer usage ratio is bigger than set threshold bytes\n");
				ret = 1;
				goto end;
			}
			break;
		case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
			if (buffer_usage_bytes < threshold_bytes) {
				printf("error: buffer usage ratio is lower than set threshold bytes\n");
				ret = 1;
				goto end;
			}
			break;
		default:
			printf("error: Unknown condition type\n");
			ret = 1;
			goto end;
		}
	}

	switch (condition_type) {
	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
		string_condition_type = string_low;
		break;
	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
		string_condition_type = string_high;
		break;
	default:
		printf("error: Unknown condition type\n");
		ret = 1;
		goto end;
	}

	printf("notification: %s %d\n", string_condition_type, nr_notifications);
end:
	return ret;
}
Commit	Line	Data
434f8068 JR	1	/*
	2	* base_client.c
	3	*
	4	* Base client application for testing of LTTng notification API
	5	*
	6	* Copyright 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
	7	*
9d16b343	8	* SPDX-License-Identifier: MIT
434f8068	9	*
434f8068 JR	10	*/
	11
	12	#include <stdio.h>
	13	#include <stdbool.h>
	14	#include <string.h>
	15	#include <unistd.h>
	16	#include <inttypes.h>
	17	#include <assert.h>
	18
	19	#include <lttng/action/action.h>
091fa780	20	#include <lttng/action/group.h>
434f8068 JR	21	#include <lttng/action/notify.h>
	22	#include <lttng/condition/buffer-usage.h>
	23	#include <lttng/condition/condition.h>
	24	#include <lttng/condition/evaluation.h>
	25	#include <lttng/domain.h>
	26	#include <lttng/endpoint.h>
	27	#include <lttng/notification/channel.h>
	28	#include <lttng/notification/notification.h>
	29	#include <lttng/trigger/trigger.h>
25040abc	30	#include <lttng/lttng-error.h>
434f8068 JR	31
	32	static unsigned int nr_notifications = 0;
	33	static unsigned int nr_expected_notifications = 0;
	34	static const char *session_name = NULL;
	35	static const char *channel_name = NULL;
	36	static double threshold_ratio = 0.0;
	37	static uint64_t threshold_bytes = 0;
	38	static bool is_threshold_ratio = false;
091fa780	39	static bool use_action_group = false;
434f8068 JR	40	static enum lttng_condition_type buffer_usage_type = LTTNG_CONDITION_TYPE_UNKNOWN;
	41	static enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE;
	42
	43	int handle_condition(
	44	const struct lttng_condition *condition,
	45	const struct lttng_evaluation *condition_evaluation);
	46
53089c7c SM	47	static
	48	int parse_arguments(char **argv)
	49	{
e062fb02	50	int sscanf_ret;
434f8068 JR	51	const char *domain_type_string = NULL;
	52	const char *buffer_usage_type_string = NULL;
	53	const char *buffer_usage_threshold_type = NULL;
	54	const char *buffer_usage_threshold_value = NULL;
	55	const char *nr_expected_notifications_string = NULL;
091fa780	56	const char *use_action_group_value = NULL;
434f8068 JR	57
	58	session_name = argv[1];
	59	channel_name = argv[2];
	60	domain_type_string = argv[3];
	61	buffer_usage_type_string = argv[4];
	62	buffer_usage_threshold_type = argv[5];
	63	buffer_usage_threshold_value = argv[6];
	64	nr_expected_notifications_string = argv[7];
091fa780	65	use_action_group_value = argv[8];
434f8068 JR	66
	67	/* Parse arguments */
	68	/* Domain type */
	69	if (!strcasecmp("LTTNG_DOMAIN_UST", domain_type_string)) {
	70	domain_type = LTTNG_DOMAIN_UST;
	71	}
	72	if (!strcasecmp("LTTNG_DOMAIN_KERNEL", domain_type_string)) {
	73	domain_type = LTTNG_DOMAIN_KERNEL;
	74	}
	75	if (domain_type == LTTNG_DOMAIN_NONE) {
	76	printf("error: Unknown domain type\n");
	77	goto error;
	78	}
	79
	80	/* Buffer usage condition type */
	81	if (!strcasecmp("low", buffer_usage_type_string)) {
	82	buffer_usage_type = LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW;
	83	}
	84	if (!strcasecmp("high", buffer_usage_type_string)) {
	85	buffer_usage_type = LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH;
	86	}
	87	if (buffer_usage_type == LTTNG_CONDITION_TYPE_UNKNOWN) {
	88	printf("error: Unknown condition type\n");
	89	goto error;
	90	}
	91
	92	/* Ratio or bytes ? */
	93	if (!strcasecmp("bytes", buffer_usage_threshold_type)) {
	94	is_threshold_ratio = false;
	95	sscanf(buffer_usage_threshold_value, "%" SCNu64, &threshold_bytes);
	96	}
	97
	98	if (!strcasecmp("ratio", buffer_usage_threshold_type)) {
	99	is_threshold_ratio = true;
	100	sscanf(buffer_usage_threshold_value, "%lf", &threshold_ratio);
	101	}
	102
	103	/* Number of notification to expect */
e062fb02 JG	104	sscanf_ret = sscanf(nr_expected_notifications_string, "%d",
	105	&nr_expected_notifications);
	106	if (sscanf_ret != 1) {
	107	printf("error: Invalid nr_expected_notifications, sscanf returned %d\n",
	108	sscanf_ret);
	109	goto error;
	110	}
434f8068	111
091fa780 FD	112	/* Put notify action in a group. */
	113	if (!strcasecmp("1", use_action_group_value)) {
	114	use_action_group = true;
	115	}
	116
434f8068 JR	117	return 0;
	118	error:
	119	return 1;
	120	}
	121
	122	int main(int argc, char **argv)
	123	{
	124	int ret = 0;
	125	enum lttng_condition_status condition_status;
091fa780	126	enum lttng_action_status action_status;
434f8068 JR	127	enum lttng_notification_channel_status nc_status;
	128	struct lttng_notification_channel *notification_channel = NULL;
	129	struct lttng_condition *condition = NULL;
	130	struct lttng_action *action = NULL;
	131	struct lttng_trigger *trigger = NULL;
	132
	133	/*
	134	* Disable buffering on stdout.
	135	* Safety measure to prevent hang on the validation side since
	136	* stdout is used for outside synchronization.
	137	*/
	138	setbuf(stdout, NULL);
	139
091fa780	140	if (argc < 9) {
434f8068 JR	141	printf("error: Missing arguments for tests\n");
	142	ret = 1;
	143	goto end;
	144	}
	145
	146	ret = parse_arguments(argv);
	147	if (ret) {
	148	printf("error: Could not parse arguments\n");
	149	goto end;
	150	}
	151
	152	/* Setup */
	153	notification_channel = lttng_notification_channel_create(
	154	lttng_session_daemon_notification_endpoint);
	155	if (!notification_channel) {
	156	printf("error: Could not create notification channel\n");
	157	ret = 1;
	158	goto end;
	159	}
	160
	161	switch (buffer_usage_type) {
	162	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
	163	condition = lttng_condition_buffer_usage_low_create();
	164	break;
	165	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
	166	condition = lttng_condition_buffer_usage_high_create();
	167	break;
	168	default:
	169	printf("error: Invalid buffer_usage_type\n");
	170	ret = 1;
	171	goto end;
	172	}
	173
	174	if (!condition) {
	175	printf("error: Could not create condition object\n");
	176	ret = 1;
	177	goto end;
	178	}
	179
	180	if (is_threshold_ratio) {
	181	condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
	182	condition, threshold_ratio);
	183	} else {
	184	condition_status = lttng_condition_buffer_usage_set_threshold(
	185	condition, threshold_bytes);
	186	}
	187
	188	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
	189	printf("error: Could not set threshold\n");
	190	ret = 1;
	191	goto end;
	192	}
	193
	194	condition_status = lttng_condition_buffer_usage_set_session_name(
	195	condition, session_name);
	196	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
	197	printf("error: Could not set session name\n");
	198	ret = 1;
	199	goto end;
	200	}
	201	condition_status = lttng_condition_buffer_usage_set_channel_name(
	202	condition, channel_name);
	203	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
	204	printf("error: Could not set channel name\n");
205	ret = 1;
206	goto end;
207	}
208	condition_status = lttng_condition_buffer_usage_set_domain_type(
854382b8	209	condition, domain_type);
434f8068 JR	210	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
	211	printf("error: Could not set domain type\n");
	212	ret = 1;
	213	goto end;
	214	}
	215
091fa780 FD	216	if (use_action_group) {
	217	struct lttng_action notify, group;
	218
	219	group = lttng_action_group_create();
	220	if (!group) {
	221	printf("error: Could not create action group\n");
	222	ret = 1;
	223	goto end;
	224	}
	225
	226	notify = lttng_action_notify_create();
	227	if (!notify) {
	228	lttng_action_destroy(group);
	229	printf("error: Could not create action notify\n");
	230	ret = 1;
	231	goto end;
	232	}
	233
	234	action_status = lttng_action_group_add_action(group, notify);
	235	if (action_status != LTTNG_ACTION_STATUS_OK) {
	236	printf("error: Could not add action notify to action group\n");
	237	lttng_action_destroy(group);
	238	lttng_action_destroy(notify);
	239	ret = 1;
	240	goto end;
	241	}
	242
	243	action = group;
	244	} else {
	245	action = lttng_action_notify_create();
	246	if (!action) {
	247	printf("error: Could not create action notify\n");
	248	ret = 1;
	249	goto end;
	250	}
434f8068 JR	251	}
	252
	253	trigger = lttng_trigger_create(condition, action);
	254	if (!trigger) {
	255	printf("error: Could not create trigger\n");
	256	ret = 1;
	257	goto end;
	258	}
	259
	260	ret = lttng_register_trigger(trigger);
	261
	262	/*
	263	* An equivalent trigger might already be registered if an other app
	264	* registered an equivalent trigger.
	265	*/
	266	if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) {
	267	printf("error: %s\n", lttng_strerror(ret));
	268	ret = 1;
	269	goto end;
	270	}
	271
	272	nc_status = lttng_notification_channel_subscribe(notification_channel, condition);
	273	if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
	274	printf("error: Could not subscribe\n");
	275	ret = 1;
	276	goto end;
	277	}
	278
	279	/* Tell outside process that the client is ready */
	280	printf("sync: ready\n");
	281
	282	for (;;) {
	283	struct lttng_notification *notification;
	284	enum lttng_notification_channel_status status;
	285	const struct lttng_evaluation *notification_evaluation;
	286	const struct lttng_condition *notification_condition;
	287
	288	if (nr_notifications == nr_expected_notifications) {
	289	ret = 0;
	290	goto end;
	291	}
	292	/* Receive the next notification. */
	293	status = lttng_notification_channel_get_next_notification(
	294	notification_channel,
	295	&notification);
	296
	297	switch (status) {
	298	case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK:
	299	break;
	300	case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED:
	301	ret = 1;
	302	printf("error: No drop should be observed during this test app\n");
	303	goto end;
	304	case LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED:
	305	/*
	306	* The notification channel has been closed by the
	307	* session daemon. This is typically caused by a session
	308	* daemon shutting down (cleanly or because of a crash).
	309	*/
	310	printf("error: Notification channel was closed\n");
	311	ret = 1;
	312	goto end;
	313	default:
	314	/* Unhandled conditions / errors. */
091fa780	315	printf("error: Unknown notification channel status (%d) \n", status);
434f8068 JR	316	ret = 1;
	317	goto end;
	318	}
	319
	320	notification_condition = lttng_notification_get_condition(notification);
	321	notification_evaluation = lttng_notification_get_evaluation(notification);
	322
	323	ret = handle_condition(notification_condition, notification_evaluation);
	324	nr_notifications++;
	325
	326	lttng_notification_destroy(notification);
	327	if (ret != 0) {
	328	goto end;
	329	}
	330	}
	331	end:
	332	if (trigger) {
	333	lttng_unregister_trigger(trigger);
	334	}
eff748d0 JR	335	if (lttng_notification_channel_unsubscribe(notification_channel, condition)) {
	336	printf("error: channel unsubscribe error\n");
	337	}
434f8068 JR	338	lttng_trigger_destroy(trigger);
	339	lttng_condition_destroy(condition);
	340	lttng_action_destroy(action);
	341	lttng_notification_channel_destroy(notification_channel);
	342	printf("exit: %d\n", ret);
	343	return ret;
	344	}
	345
	346	int handle_condition(
	347	const struct lttng_condition *condition,
	348	const struct lttng_evaluation *evaluation)
	349	{
	350	int ret = 0;
	351	const char *string_low = "low";
	352	const char *string_high = "high";
	353	const char *string_condition_type = NULL;
	354	const char *condition_session_name = NULL;
	355	const char *condition_channel_name = NULL;
	356	enum lttng_condition_type condition_type;
	357	enum lttng_domain_type condition_domain_type;
	358	double buffer_usage_ratio;
	359	uint64_t buffer_usage_bytes;
	360
	361	condition_type = lttng_condition_get_type(condition);
	362
	363	if (condition_type != buffer_usage_type) {
	364	ret = 1;
	365	printf("error: condition type and buffer usage type are not the same\n");
	366	goto end;
	367	}
	368
	369	/* Fetch info to test */
eff748d0	370	ret = lttng_condition_buffer_usage_get_session_name(condition,
434f8068	371	&condition_session_name);
eff748d0 JR	372	if (ret) {
	373	printf("error: session name could not be fetched\n");
	374	ret = 1;
	375	goto end;
	376	}
	377	ret = lttng_condition_buffer_usage_get_channel_name(condition,
434f8068	378	&condition_channel_name);
eff748d0 JR	379	if (ret) {
	380	printf("error: channel name could not be fetched\n");
	381	ret = 1;
	382	goto end;
	383	}
	384	ret = lttng_condition_buffer_usage_get_domain_type(condition,
434f8068	385	&condition_domain_type);
eff748d0 JR	386	if (ret) {
	387	printf("error: domain type could not be fetched\n");
	388	ret = 1;
	389	goto end;
	390	}
434f8068 JR	391
	392	if (strcmp(condition_session_name, session_name) != 0) {
	393	printf("error: session name differs\n");
	394	ret = 1;
	395	goto end;
	396	}
	397
	398	if (strcmp(condition_channel_name, channel_name) != 0) {
	399	printf("error: channel name differs\n");
	400	ret = 1;
	401	goto end;
	402	}
	403
	404	if (condition_domain_type != domain_type) {
	405	printf("error: domain type differs\n");
	406	ret = 1;
	407	goto end;
	408	}
	409
	410	if (is_threshold_ratio) {
	411	lttng_evaluation_buffer_usage_get_usage_ratio(
	412	evaluation, &buffer_usage_ratio);
	413	switch (condition_type) {
	414	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
	415	if (buffer_usage_ratio > threshold_ratio) {
	416	printf("error: buffer usage ratio is bigger than set threshold ratio\n");
	417	ret = 1;
	418	goto end;
	419	}
	420	break;
	421	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
	422	if (buffer_usage_ratio < threshold_ratio) {
	423	printf("error: buffer usage ratio is lower than set threshold ratio\n");
	424	ret = 1;
	425	goto end;
	426	}
	427	break;
	428	default:
	429	printf("error: Unknown condition type\n");
	430	ret = 1;
	431	goto end;
	432	}
	433	} else {
	434	lttng_evaluation_buffer_usage_get_usage(
	435	evaluation, &buffer_usage_bytes);
	436	switch (condition_type) {
	437	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
	438	if (buffer_usage_bytes > threshold_bytes) {
	439	printf("error: buffer usage ratio is bigger than set threshold bytes\n");
	440	ret = 1;
	441	goto end;
	442	}
	443	break;
	444	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
	445	if (buffer_usage_bytes < threshold_bytes) {
	446	printf("error: buffer usage ratio is lower than set threshold bytes\n");
	447	ret = 1;
	448	goto end;
	449	}
	450	break;
	451	default:
	452	printf("error: Unknown condition type\n");
	453	ret = 1;
	454	goto end;
455	}
456	}
457
458	switch (condition_type) {
459	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
460	string_condition_type = string_low;
461	break;
462	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
463	string_condition_type = string_high;
464	break;
465	default:
466	printf("error: Unknown condition type\n");
467	ret = 1;
468	goto end;
469	}
470
471	printf("notification: %s %d\n", string_condition_type, nr_notifications);
472	end:
473	return ret;
474	}