[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/list.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_list = 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_list_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_list_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_list_value)) {
		use_action_list = 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;
	enum lttng_error_code ret_code;

	/*
	 * 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_list) {
		struct lttng_action *notify, *group;

		group = lttng_action_list_create();
		if (!group) {
			printf("error: Could not create action list\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_list_add_action(group, notify);
		if (action_status != LTTNG_ACTION_STATUS_OK) {
			printf("error: Could not add action notify to action list\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_code = lttng_register_trigger_with_automatic_name(trigger);

	/*
	 * An equivalent trigger might already be registered if an other app
	 * registered an equivalent trigger.
	 */
	if (ret_code != LTTNG_OK && ret_code != LTTNG_ERR_TRIGGER_EXISTS) {
		printf("error: %s\n", lttng_strerror(-ret_code));
		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>
ad63a966	20	#include <lttng/action/list.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;
702f26c8	39	static bool use_action_list = 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;
702f26c8	56	const char *use_action_list_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];
702f26c8	65	use_action_list_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	112	/* Put notify action in a group. */
702f26c8 JR	113	if (!strcasecmp("1", use_action_list_value)) {
702f26c8 JR	114	use_action_list = true;
091fa780 FD	115	}
091fa780 FD	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;
a5c2d2a7	132	enum lttng_error_code ret_code;
434f8068 JR	133
	134	/*
	135	* Disable buffering on stdout.
	136	* Safety measure to prevent hang on the validation side since
	137	* stdout is used for outside synchronization.
	138	*/
	139	setbuf(stdout, NULL);
	140
091fa780	141	if (argc < 9) {
434f8068 JR	142	printf("error: Missing arguments for tests\n");
	143	ret = 1;
	144	goto end;
	145	}
	146
	147	ret = parse_arguments(argv);
	148	if (ret) {
	149	printf("error: Could not parse arguments\n");
	150	goto end;
	151	}
	152
	153	/* Setup */
	154	notification_channel = lttng_notification_channel_create(
	155	lttng_session_daemon_notification_endpoint);
	156	if (!notification_channel) {
	157	printf("error: Could not create notification channel\n");
	158	ret = 1;
	159	goto end;
	160	}
	161
	162	switch (buffer_usage_type) {
	163	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
	164	condition = lttng_condition_buffer_usage_low_create();
	165	break;
	166	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
	167	condition = lttng_condition_buffer_usage_high_create();
	168	break;
	169	default:
	170	printf("error: Invalid buffer_usage_type\n");
	171	ret = 1;
	172	goto end;
	173	}
	174
	175	if (!condition) {
	176	printf("error: Could not create condition object\n");
	177	ret = 1;
	178	goto end;
	179	}
	180
	181	if (is_threshold_ratio) {
	182	condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
	183	condition, threshold_ratio);
	184	} else {
	185	condition_status = lttng_condition_buffer_usage_set_threshold(
	186	condition, threshold_bytes);
	187	}
	188
	189	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
	190	printf("error: Could not set threshold\n");
	191	ret = 1;
	192	goto end;
	193	}
	194
	195	condition_status = lttng_condition_buffer_usage_set_session_name(
	196	condition, session_name);
	197	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
	198	printf("error: Could not set session name\n");
	199	ret = 1;
	200	goto end;
	201	}
	202	condition_status = lttng_condition_buffer_usage_set_channel_name(
	203	condition, channel_name);
	204	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
	205	printf("error: Could not set channel name\n");
206	ret = 1;
207	goto end;
208	}
209	condition_status = lttng_condition_buffer_usage_set_domain_type(
854382b8	210	condition, domain_type);
434f8068 JR	211	if (condition_status != LTTNG_CONDITION_STATUS_OK) {
	212	printf("error: Could not set domain type\n");
	213	ret = 1;
	214	goto end;
	215	}
	216
702f26c8	217	if (use_action_list) {
091fa780 FD	218	struct lttng_action notify, group;
091fa780 FD	219
702f26c8	220	group = lttng_action_list_create();
091fa780	221	if (!group) {
702f26c8	222	printf("error: Could not create action list\n");
091fa780 FD	223	ret = 1;
	224	goto end;
	225	}
	226
	227	notify = lttng_action_notify_create();
	228	if (!notify) {
	229	lttng_action_destroy(group);
	230	printf("error: Could not create action notify\n");
	231	ret = 1;
	232	goto end;
	233	}
	234
702f26c8	235	action_status = lttng_action_list_add_action(group, notify);
091fa780	236	if (action_status != LTTNG_ACTION_STATUS_OK) {
702f26c8	237	printf("error: Could not add action notify to action list\n");
091fa780 FD	238	lttng_action_destroy(group);
	239	lttng_action_destroy(notify);
	240	ret = 1;
	241	goto end;
	242	}
	243
	244	action = group;
	245	} else {
	246	action = lttng_action_notify_create();
	247	if (!action) {
	248	printf("error: Could not create action notify\n");
	249	ret = 1;
	250	goto end;
	251	}
434f8068 JR	252	}
	253
	254	trigger = lttng_trigger_create(condition, action);
	255	if (!trigger) {
	256	printf("error: Could not create trigger\n");
	257	ret = 1;
	258	goto end;
	259	}
	260
a5c2d2a7	261	ret_code = lttng_register_trigger_with_automatic_name(trigger);
434f8068 JR	262
	263	/*
	264	* An equivalent trigger might already be registered if an other app
	265	* registered an equivalent trigger.
	266	*/
a5c2d2a7 JG	267	if (ret_code != LTTNG_OK && ret_code != LTTNG_ERR_TRIGGER_EXISTS) {
a5c2d2a7 JG	268	printf("error: %s\n", lttng_strerror(-ret_code));
434f8068 JR	269	ret = 1;
	270	goto end;
	271	}
	272
	273	nc_status = lttng_notification_channel_subscribe(notification_channel, condition);
	274	if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
	275	printf("error: Could not subscribe\n");
	276	ret = 1;
	277	goto end;
	278	}
	279
	280	/* Tell outside process that the client is ready */
	281	printf("sync: ready\n");
	282
	283	for (;;) {
	284	struct lttng_notification *notification;
	285	enum lttng_notification_channel_status status;
	286	const struct lttng_evaluation *notification_evaluation;
	287	const struct lttng_condition *notification_condition;
	288
	289	if (nr_notifications == nr_expected_notifications) {
	290	ret = 0;
	291	goto end;
	292	}
	293	/* Receive the next notification. */
	294	status = lttng_notification_channel_get_next_notification(
	295	notification_channel,
	296	&notification);
	297
	298	switch (status) {
	299	case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK:
	300	break;
	301	case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED:
	302	ret = 1;
	303	printf("error: No drop should be observed during this test app\n");
	304	goto end;
	305	case LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED:
	306	/*
	307	* The notification channel has been closed by the
	308	* session daemon. This is typically caused by a session
	309	* daemon shutting down (cleanly or because of a crash).
	310	*/
	311	printf("error: Notification channel was closed\n");
	312	ret = 1;
	313	goto end;
	314	default:
	315	/* Unhandled conditions / errors. */
091fa780	316	printf("error: Unknown notification channel status (%d) \n", status);
434f8068 JR	317	ret = 1;
	318	goto end;
	319	}
	320
	321	notification_condition = lttng_notification_get_condition(notification);
	322	notification_evaluation = lttng_notification_get_evaluation(notification);
	323
	324	ret = handle_condition(notification_condition, notification_evaluation);
	325	nr_notifications++;
	326
	327	lttng_notification_destroy(notification);
	328	if (ret != 0) {
	329	goto end;
	330	}
	331	}
	332	end:
	333	if (trigger) {
	334	lttng_unregister_trigger(trigger);
	335	}
eff748d0 JR	336	if (lttng_notification_channel_unsubscribe(notification_channel, condition)) {
	337	printf("error: channel unsubscribe error\n");
	338	}
434f8068 JR	339	lttng_trigger_destroy(trigger);
	340	lttng_condition_destroy(condition);
	341	lttng_action_destroy(action);
	342	lttng_notification_channel_destroy(notification_channel);
	343	printf("exit: %d\n", ret);
	344	return ret;
	345	}
	346
	347	int handle_condition(
	348	const struct lttng_condition *condition,
	349	const struct lttng_evaluation *evaluation)
	350	{
	351	int ret = 0;
	352	const char *string_low = "low";
	353	const char *string_high = "high";
	354	const char *string_condition_type = NULL;
	355	const char *condition_session_name = NULL;
	356	const char *condition_channel_name = NULL;
	357	enum lttng_condition_type condition_type;
	358	enum lttng_domain_type condition_domain_type;
	359	double buffer_usage_ratio;
	360	uint64_t buffer_usage_bytes;
	361
	362	condition_type = lttng_condition_get_type(condition);
	363
	364	if (condition_type != buffer_usage_type) {
	365	ret = 1;
	366	printf("error: condition type and buffer usage type are not the same\n");
	367	goto end;
	368	}
	369
	370	/* Fetch info to test */
eff748d0	371	ret = lttng_condition_buffer_usage_get_session_name(condition,
434f8068	372	&condition_session_name);
eff748d0 JR	373	if (ret) {
	374	printf("error: session name could not be fetched\n");
	375	ret = 1;
	376	goto end;
	377	}
	378	ret = lttng_condition_buffer_usage_get_channel_name(condition,
434f8068	379	&condition_channel_name);
eff748d0 JR	380	if (ret) {
	381	printf("error: channel name could not be fetched\n");
	382	ret = 1;
	383	goto end;
	384	}
	385	ret = lttng_condition_buffer_usage_get_domain_type(condition,
434f8068	386	&condition_domain_type);
eff748d0 JR	387	if (ret) {
	388	printf("error: domain type could not be fetched\n");
	389	ret = 1;
	390	goto end;
	391	}
434f8068 JR	392
	393	if (strcmp(condition_session_name, session_name) != 0) {
	394	printf("error: session name differs\n");
	395	ret = 1;
	396	goto end;
	397	}
	398
	399	if (strcmp(condition_channel_name, channel_name) != 0) {
	400	printf("error: channel name differs\n");
	401	ret = 1;
	402	goto end;
	403	}
	404
	405	if (condition_domain_type != domain_type) {
	406	printf("error: domain type differs\n");
	407	ret = 1;
	408	goto end;
	409	}
	410
	411	if (is_threshold_ratio) {
	412	lttng_evaluation_buffer_usage_get_usage_ratio(
	413	evaluation, &buffer_usage_ratio);
	414	switch (condition_type) {
	415	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
	416	if (buffer_usage_ratio > threshold_ratio) {
	417	printf("error: buffer usage ratio is bigger than set threshold ratio\n");
	418	ret = 1;
	419	goto end;
	420	}
	421	break;
	422	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
	423	if (buffer_usage_ratio < threshold_ratio) {
	424	printf("error: buffer usage ratio is lower than set threshold ratio\n");
	425	ret = 1;
	426	goto end;
	427	}
	428	break;
	429	default:
	430	printf("error: Unknown condition type\n");
	431	ret = 1;
	432	goto end;
	433	}
	434	} else {
	435	lttng_evaluation_buffer_usage_get_usage(
	436	evaluation, &buffer_usage_bytes);
	437	switch (condition_type) {
	438	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
	439	if (buffer_usage_bytes > threshold_bytes) {
	440	printf("error: buffer usage ratio is bigger than set threshold bytes\n");
	441	ret = 1;
	442	goto end;
	443	}
	444	break;
	445	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
	446	if (buffer_usage_bytes < threshold_bytes) {
	447	printf("error: buffer usage ratio is lower than set threshold bytes\n");
	448	ret = 1;
	449	goto end;
	450	}
	451	break;
	452	default:
	453	printf("error: Unknown condition type\n");
	454	ret = 1;
	455	goto end;
456	}
457	}
458
459	switch (condition_type) {
460	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
461	string_condition_type = string_low;
462	break;
463	case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
464	string_condition_type = string_high;
465	break;
466	default:
467	printf("error: Unknown condition type\n");
468	ret = 1;
469	goto end;
470	}
471
472	printf("notification: %s %d\n", string_condition_type, nr_notifications);
473	end:
474	return ret;
475	}