fix: genirq: Restrict export of irq_to_desc() (v5.11)

[lttng-modules.git] / src / lttng-event-notifier-notification.c

diff --git a/src/lttng-event-notifier-notification.c b/src/lttng-event-notifier-notification.c
index b67af11a77ecf0763801030346d6ceefc5f7ace1..52b5593ac9325b5324c9169f72ff736044a49cac 100644 (file)
--- a/src/lttng-event-notifier-notification.c
+++ b/src/lttng-event-notifier-notification.c
@@ -11,6 +11,7 @@
 #include <lttng/events.h>
 #include <lttng/msgpack.h>
 #include <lttng/event-notifier-notification.h>
+#include <wrapper/barrier.h>
 
 /*
  * The capture buffer size needs to be below 1024 bytes to avoid the
@@ -347,6 +348,33 @@ end:
        return ret;
 }
 
+static
+void record_error(struct lttng_event_notifier *event_notifier)
+{
+
+       struct lttng_event_notifier_group *event_notifier_group = event_notifier->group;
+       struct lttng_counter *error_counter;
+       size_t dimension_index[1];
+       int ret;
+
+       /*
+        * lttng_smp_load_acquire paired with lttng_smp_store_release orders
+        * creation of the error counter and setting error_counter_len
+        * before the error_counter is used.
+        */
+       error_counter = lttng_smp_load_acquire(&event_notifier_group->error_counter);
+       /* This group may not have an error counter attached to it. */
+       if (!error_counter)
+               return;
+
+       dimension_index[0] = event_notifier->error_counter_index;
+
+       ret = error_counter->ops->counter_add(error_counter->counter,
+                       dimension_index, 1);
+       if (ret)
+               WARN_ON_ONCE(1);
+}
+
 static
 void notification_send(struct lttng_event_notifier_notification *notif,
                struct lttng_event_notifier *event_notifier)
@@ -375,9 +403,7 @@ void notification_send(struct lttng_event_notifier_notification *notif,
                        lttng_alignof(kernel_notif), -1);
        ret = event_notifier_group->ops->event_reserve(&ctx, 0);
        if (ret < 0) {
-               //TODO: error handling with counter maps
-               //silently drop for now.
-               WARN_ON_ONCE(1);
+               record_error(event_notifier);
                return;
        }