Implement event notifier error counter

[lttng-modules.git] / include / lttng / events.h

diff --git a/include/lttng/events.h b/include/lttng/events.h
index 7b3b18571184fb0ee1d9717277800d42f20ce06e..b4c5372ae1f9266e9e851992f33059d7544bea90 100644 (file)
--- a/include/lttng/events.h
+++ b/include/lttng/events.h
@@ -356,6 +356,7 @@ struct lttng_event {
 struct lttng_event_notifier {
        enum lttng_event_type evtype;   /* First field. */
        uint64_t user_token;
+       uint64_t error_counter_index;
        int enabled;
        int registered;                 /* has reg'd tracepoint probe */
        const struct lttng_event_desc *desc;
@@ -426,6 +427,7 @@ struct lttng_event_enabler {
 
 struct lttng_event_notifier_enabler {
        struct lttng_enabler base;
+       uint64_t error_counter_index;
        struct list_head node;  /* List of event_notifier enablers */
        struct lttng_event_notifier_group *group;
 
@@ -675,6 +677,14 @@ struct lttng_session {
        char creation_time[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
 };
 
+struct lttng_counter {
+       struct file *file;              /* File associated to counter. */
+       struct file *owner;
+       struct lttng_counter_transport *transport;
+       struct lib_counter *counter;
+       struct lttng_counter_ops *ops;
+};
+
 struct lttng_event_notifier_group {
        struct file *file;              /* File associated to event notifier group */
        struct file *notif_file;        /* File used to expose notifications to userspace. */
@@ -759,7 +769,23 @@ int lttng_session_metadata_regenerate(struct lttng_session *session);
 int lttng_session_statedump(struct lttng_session *session);
 void metadata_cache_destroy(struct kref *kref);
 
+struct lttng_counter *lttng_kernel_counter_create(
+               const char *counter_transport_name, size_t number_dimensions,
+               const size_t *dimensions_sizes);
+int lttng_kernel_counter_read(struct lttng_counter *counter,
+               const size_t *dimension_indexes, int32_t cpu,
+               int64_t *val, bool *overflow, bool *underflow);
+int lttng_kernel_counter_aggregate(struct lttng_counter *counter,
+               const size_t *dimension_indexes, int64_t *val,
+               bool *overflow, bool *underflow);
+int lttng_kernel_counter_clear(struct lttng_counter *counter,
+               const size_t *dimension_indexes);
+
+
 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
+int lttng_event_notifier_group_create_error_counter(
+               struct file *event_notifier_group_file,
+               const struct lttng_kernel_counter_conf *error_counter_conf);
 void lttng_event_notifier_group_destroy(
                struct lttng_event_notifier_group *event_notifier_group);
 
@@ -795,6 +821,7 @@ struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan,
 struct lttng_event_notifier *lttng_event_notifier_create(
                                const struct lttng_event_desc *event_notifier_desc,
                                uint64_t id,
+                               uint64_t error_counter_idx,
                                struct lttng_event_notifier_group *event_notifier_group,
                                struct lttng_kernel_event_notifier *event_notifier_param,
                                void *filter,
@@ -802,6 +829,7 @@ struct lttng_event_notifier *lttng_event_notifier_create(
 struct lttng_event_notifier *_lttng_event_notifier_create(
                                const struct lttng_event_desc *event_notifier_desc,
                                uint64_t id,
+                               uint64_t error_counter_idx,
                                struct lttng_event_notifier_group *event_notifier_group,
                                struct lttng_kernel_event_notifier *event_notifier_param,
                                void *filter,