--- /dev/null
+/*
+ * base_client.c
+ *
+ * Base client application for testing of LTTng notification API
+ *
+ * Copyright 2017 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#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/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>
+
+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 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);
+
+int parse_arguments(char **argv) {
+ 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;
+
+ 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];
+
+ /* 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(nr_expected_notifications_string, "%d", &nr_expected_notifications);
+
+ return 0;
+error:
+ return 1;
+}
+
+int main(int argc, char **argv)
+{
+ int ret = 0;
+ enum lttng_condition_status condition_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 < 8) {
+ 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, LTTNG_DOMAIN_UST);
+ if (condition_status != LTTNG_CONDITION_STATUS_OK) {
+ printf("error: Could not set domain type\n");
+ ret = 1;
+ goto end;
+ }
+
+ 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,
+ ¬ification);
+
+ 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\n");
+ 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);
+ }
+ lttng_notification_channel_unsubscribe(notification_channel, condition);
+ 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 */
+ lttng_condition_buffer_usage_get_session_name(condition,
+ &condition_session_name);
+ lttng_condition_buffer_usage_get_channel_name(condition,
+ &condition_channel_name);
+ lttng_condition_buffer_usage_get_domain_type(condition,
+ &condition_domain_type);
+
+ 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;
+}
projects / lttng-tools.git / blobdiff