}
}
+static
+int lttng_kernel_event_notifier_clear_error_counter(struct lttng_kernel_event_common *event)
+{
+ switch (event->type) {
+ case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
+ return 0;
+ case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
+ {
+ struct lttng_kernel_event_notifier *event_notifier =
+ container_of(event, struct lttng_kernel_event_notifier, parent);
+ struct lttng_counter *error_counter;
+ struct lttng_event_notifier_group *event_notifier_group = event_notifier->priv->group;
+ size_t dimension_index[1];
+ int ret;
+
+ /*
+ * Clear the error counter bucket. The sessiond keeps track of which
+ * bucket is currently in use. We trust it. The session lock
+ * synchronizes against concurrent creation of the error
+ * counter.
+ */
+ error_counter = event_notifier_group->error_counter;
+ if (!error_counter)
+ return 0;
+ /*
+ * Check that the index is within the boundary of the counter.
+ */
+ if (event_notifier->priv->error_counter_index >= event_notifier_group->error_counter_len) {
+ printk(KERN_INFO "LTTng: event_notifier: Error counter index out-of-bound: counter-len=%zu, index=%llu\n",
+ event_notifier_group->error_counter_len, event_notifier->priv->error_counter_index);
+ return -EINVAL;
+ }
+
+ dimension_index[0] = event_notifier->priv->error_counter_index;
+ ret = error_counter->ops->counter_clear(error_counter->counter, dimension_index);
+ if (ret) {
+ printk(KERN_INFO "LTTng: event_notifier: Unable to clear error counter bucket %llu\n",
+ event_notifier->priv->error_counter_index);
+ return -EINVAL;
+ }
+ return 0;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
/*
* Supports event creation while tracing session is active.
* Needs to be called with sessions mutex held.
enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation;
struct lttng_kernel_event_common_private *event_priv;
struct lttng_kernel_event_common *event;
- struct lttng_kernel_event_recorder_private *event_recorder_priv;
struct lttng_kernel_event_recorder *event_recorder;
const char *event_name;
struct hlist_head *head;
head = utils_borrow_hash_table_bucket(events_ht->table, LTTNG_EVENT_HT_SIZE, event_name);
lttng_hlist_for_each_entry(event_priv, head, hlist_node) {
- event_recorder_priv = container_of(event_priv, struct lttng_kernel_event_recorder_private, parent);
-
- WARN_ON_ONCE(!event_priv->desc);
- if (!strncmp(event_priv->desc->event_name, event_name,
- LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1)
- && chan == event_recorder_priv->pub->chan) {
+ if (lttng_event_enabler_event_name_match_event(&event_enabler->parent, event_name, event_priv->pub)) {
ret = -EEXIST;
goto exist;
}
struct lttng_event_ht *events_ht = lttng_get_event_ht_from_enabler(&event_enabler->parent);
struct lttng_event_notifier_group *event_notifier_group = event_enabler->group;
struct lttng_kernel_abi_event *event_param = &event_enabler->parent.event_param;
- uint64_t token = event_enabler->parent.user_token;
enum lttng_kernel_abi_instrumentation itype = event_param->instrumentation;
struct lttng_kernel_event_common_private *event_priv;
struct lttng_kernel_event_common *event;
- struct lttng_kernel_event_notifier_private *event_notifier_priv;
struct lttng_kernel_event_notifier *event_notifier;
- struct lttng_counter *error_counter;
const char *event_name;
struct hlist_head *head;
int ret;
head = utils_borrow_hash_table_bucket(events_ht->table, LTTNG_EVENT_HT_SIZE, event_name);
lttng_hlist_for_each_entry(event_priv, head, hlist_node) {
- event_notifier_priv = container_of(event_priv, struct lttng_kernel_event_notifier_private, parent);
-
- WARN_ON_ONCE(!event_priv->desc);
- if (!strncmp(event_priv->desc->event_name, event_name,
- LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1)
- && event_notifier_group == event_notifier_priv->group
- && token == event_priv->user_token) {
+ if (lttng_event_enabler_event_name_match_event(&event_enabler->parent, event_name, event_priv->pub)) {
ret = -EEXIST;
goto exist;
}
list_add(&event->priv->node, &event_notifier_group->event_notifiers_head);
hlist_add_head(&event->priv->hlist_node, head);
- /*
- * Clear the error counter bucket. The sessiond keeps track of which
- * bucket is currently in use. We trust it. The session lock
- * synchronizes against concurrent creation of the error
- * counter.
- */
- error_counter = event_notifier_group->error_counter;
- if (error_counter) {
- size_t dimension_index[1];
-
- /*
- * Check that the index is within the boundary of the counter.
- */
- if (event_notifier->priv->error_counter_index >= event_notifier_group->error_counter_len) {
- printk(KERN_INFO "LTTng: event_notifier: Error counter index out-of-bound: counter-len=%zu, index=%llu\n",
- event_notifier_group->error_counter_len, event_notifier->priv->error_counter_index);
- ret = -EINVAL;
- goto register_error;
- }
-
- dimension_index[0] = event_notifier->priv->error_counter_index;
- ret = error_counter->ops->counter_clear(error_counter->counter, dimension_index);
- if (ret) {
- printk(KERN_INFO "LTTng: event_notifier: Unable to clear error counter bucket %llu\n",
- event_notifier->priv->error_counter_index);
- goto register_error;
- }
- }
-
+ ret = lttng_kernel_event_notifier_clear_error_counter(event);
+ if (ret)
+ goto register_error;
return event_notifier;
register_error:
}
}
+bool lttng_event_enabler_event_name_match_event(struct lttng_event_enabler_common *event_enabler,
+ const char *event_name,
+ struct lttng_kernel_event_common *event)
+{
+ if (event_enabler->event_param.instrumentation != event->priv->instrumentation)
+ return false;
+
+ switch (event_enabler->enabler_type) {
+ case LTTNG_EVENT_ENABLER_TYPE_RECORDER:
+ {
+ struct lttng_event_recorder_enabler *event_recorder_enabler =
+ container_of(event_enabler, struct lttng_event_recorder_enabler, parent);
+ struct lttng_kernel_event_recorder *event_recorder =
+ container_of(event, struct lttng_kernel_event_recorder, parent);
+
+ if (!strncmp(event->priv->desc->event_name, event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1)
+ && event_recorder->chan == event_recorder_enabler->chan)
+ return true;
+ else
+ return false;
+ }
+ case LTTNG_EVENT_ENABLER_TYPE_NOTIFIER:
+ {
+ struct lttng_event_notifier_enabler *event_notifier_enabler =
+ container_of(event_enabler, struct lttng_event_notifier_enabler, parent);
+ struct lttng_kernel_event_notifier *event_notifier =
+ container_of(event, struct lttng_kernel_event_notifier, parent);
+
+ if (!strncmp(event->priv->desc->event_name, event_name, LTTNG_KERNEL_ABI_SYM_NAME_LEN - 1)
+ && event_notifier->priv->group == event_notifier_enabler->group
+ && event->priv->user_token == event_enabler->user_token)
+ return true;
+ else
+ return false;
+ }
+ default:
+ WARN_ON_ONCE(1);
+ return false;
+ }
+}
+
static
struct lttng_enabler_ref *lttng_enabler_ref(
struct list_head *enablers_ref_list,
projects / lttng-modules.git / blobdiff