X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fevent-notifier-error-accounting.hpp;fp=src%2Fbin%2Flttng-sessiond%2Fevent-notifier-error-accounting.hpp;h=89466bd441605bf9b1336e289b92ac10b2105843;hp=0000000000000000000000000000000000000000;hb=c9e313bc594f40a86eed237dce222c0fc99c957f;hpb=4878de5c7deb512bbdac4fdfc498907efa06fb7c

diff --git a/src/bin/lttng-sessiond/event-notifier-error-accounting.hpp b/src/bin/lttng-sessiond/event-notifier-error-accounting.hpp
new file mode 100644
index 000000000..89466bd44
--- /dev/null
+++ b/src/bin/lttng-sessiond/event-notifier-error-accounting.hpp
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
+#ifndef _EVENT_NOTIFIER_ERROR_ACCOUNTING_H
+#define _EVENT_NOTIFIER_ERROR_ACCOUNTING_H
+
+#include <stdint.h>
+
+#include <lttng/trigger/trigger.h>
+
+#include "ust-app.hpp"
+
+enum event_notifier_error_accounting_status {
+	EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK,
+	EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_ERR,
+	EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOT_FOUND,
+	EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM,
+	EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE,
+	EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_APP_DEAD,
+	EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_UNSUPPORTED,
+};
+
+/*
+ * Initialize the event notifier error accounting system.
+ * `buffer_size_kernel` and `buffer_size_ust` represent the number of buckets
+ * to be allocated for each domain.
+ */
+enum event_notifier_error_accounting_status
+event_notifier_error_accounting_init(uint64_t buffer_size_kernel,
+		uint64_t buffer_size_ust);
+
+/*
+ * Register the kernel event notifier group.
+ * This allocates the counter object on the kernel side.
+ */
+enum event_notifier_error_accounting_status
+event_notifier_error_accounting_register_kernel(
+		int kernel_event_notifier_group_fd);
+
+#ifdef HAVE_LIBLTTNG_UST_CTL
+
+/*
+ * Register a UST application.
+ *
+ * This reuses (or creates) the counter object of the app UID.
+ */
+enum event_notifier_error_accounting_status
+event_notifier_error_accounting_register_app(struct ust_app *app);
+
+/*
+ * Unregister a UST application.
+ */
+enum event_notifier_error_accounting_status
+event_notifier_error_accounting_unregister_app(struct ust_app *app);
+
+#else /* HAVE_LIBLTTNG_UST_CTL */
+
+static inline
+enum event_notifier_error_accounting_status
+event_notifier_error_accounting_register_app(
+		struct ust_app *app __attribute__((unused)))
+{
+	return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK;
+}
+
+static inline
+enum event_notifier_error_accounting_status
+event_notifier_error_accounting_unregister_app(
+		struct ust_app *app __attribute__((unused)))
+{
+	return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK;
+}
+#endif /* HAVE_LIBLTTNG_UST_CTL */
+
+/*
+ * Allocates, reserves and returns the error counter index for that trigger.
+ */
+enum event_notifier_error_accounting_status
+event_notifier_error_accounting_register_event_notifier(
+		const struct lttng_trigger *trigger,
+		uint64_t *error_counter_index);
+
+enum event_notifier_error_accounting_status
+event_notifier_error_accounting_get_count(
+		const struct lttng_trigger *trigger,
+		uint64_t *count);
+
+void event_notifier_error_accounting_unregister_event_notifier(
+		const struct lttng_trigger *trigger);
+
+void event_notifier_error_accounting_fini(void);
+
+#endif /* _EVENT_NOTIFIER_ERROR_ACCOUNTING_H */