sessiond: Implement kernel event notifier error counter

[lttng-tools.git] / src / bin / lttng-sessiond / kernel.c

diff --git a/src/bin/lttng-sessiond/kernel.c b/src/bin/lttng-sessiond/kernel.c
index 03a358a0d3f1da9478ef220c3e93309298b469f7..afeb181c946f90ae2cb6d0cee40276dd841959cd 100644 (file)
--- a/src/bin/lttng-sessiond/kernel.c
+++ b/src/bin/lttng-sessiond/kernel.c
@@ -34,6 +34,7 @@
 #include <lttng/event-rule/event-rule-internal.h>
 #include <lttng/event-rule/userspace-probe-internal.h>
 
+#include "event-notifier-error-accounting.h"
 #include "lttng-sessiond.h"
 #include "lttng-syscall.h"
 #include "condition-internal.h"
@@ -41,6 +42,7 @@
 #include "kernel.h"
 #include "kernel-consumer.h"
 #include "kern-modules.h"
+#include "sessiond-config.h"
 #include "utils.h"
 #include "rotate.h"
 #include "modprobe.h"
@@ -1989,7 +1991,8 @@ int init_kernel_tracer(void)
                WARN("Failed to create kernel event notifier group");
                kernel_tracer_event_notifier_group_fd = -1;
        } else {
-               const enum lttng_error_code error_code_ret =
+               enum event_notifier_error_accounting_status error_accounting_status;
+               enum lttng_error_code error_code_ret =
                                kernel_create_event_notifier_group_notification_fd(
                                                &kernel_tracer_event_notifier_group_notification_fd);
 
@@ -1997,6 +2000,14 @@ int init_kernel_tracer(void)
                        goto error_modules;
                }
 
+               error_accounting_status = event_notifier_error_accounting_register_kernel(
+                               kernel_tracer_event_notifier_group_fd);
+               if (error_accounting_status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) {
+                       ERR("Failed to initialize event notifier error accounting for kernel tracer");
+                       error_code_ret = LTTNG_ERR_EVENT_NOTIFIER_ERROR_ACCOUNTING;
+                       goto error_modules;
+               }
+
                kernel_token_to_event_notifier_rule_ht = cds_lfht_new(
                                DEFAULT_HT_SIZE, 1, 0,
                                CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING,
@@ -2322,6 +2333,7 @@ static enum lttng_error_code kernel_create_event_notifier_rule(
        assert(event_rule_type != LTTNG_EVENT_RULE_TYPE_UNKNOWN);
 
        error_code_ret = trace_kernel_create_event_notifier_rule(trigger, token,
+                       lttng_condition_on_event_get_error_counter_index(condition),
                        &event_notifier_rule);
        if (error_code_ret != LTTNG_OK) {
                goto error;
@@ -2334,6 +2346,8 @@ static enum lttng_error_code kernel_create_event_notifier_rule(
        }
 
        kernel_event_notifier.event.token = event_notifier_rule->token;
+       kernel_event_notifier.error_counter_idx =
+                       lttng_condition_on_event_get_error_counter_index(condition);
 
        fd = kernctl_create_event_notifier(
                        kernel_tracer_event_notifier_group_fd,