}
}
+static
+void lttng_event_enabler_init_event_filter(struct lttng_event_enabler_common *event_enabler,
+ struct lttng_kernel_event_common *event)
+{
+ /* Link filter bytecodes if not linked yet. */
+ lttng_enabler_link_bytecode(event->priv->desc, lttng_static_ctx,
+ &event->priv->filter_bytecode_runtime_head, &event_enabler->filter_bytecode_head);
+}
+
static
void lttng_event_enabler_init_event_capture(struct lttng_event_enabler_common *event_enabler,
struct lttng_kernel_event_common *event)
* Should be called with sessions mutex held.
*/
static
-int lttng_event_enabler_ref_events(struct lttng_event_recorder_enabler *event_enabler)
+int lttng_event_enabler_ref_events(struct lttng_event_enabler_common *event_enabler)
{
- struct lttng_event_enabler_common *base_enabler = lttng_event_recorder_enabler_as_enabler(event_enabler);
- struct lttng_kernel_event_recorder_private *event_recorder_priv;
- struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(&event_enabler->parent);
+ struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(event_enabler);
+ struct lttng_kernel_event_common_private *event_priv;
- lttng_syscall_table_set_wildcard_all(base_enabler);
+ lttng_syscall_table_set_wildcard_all(event_enabler);
/* First ensure that probe events are created for this enabler. */
- lttng_create_event_if_missing(&event_enabler->parent);
+ lttng_create_event_if_missing(event_enabler);
- /* For each event matching event_enabler in session event list. */
- list_for_each_entry(event_recorder_priv, event_list_head, parent.node) {
- struct lttng_kernel_event_recorder *event_recorder = event_recorder_priv->pub;
+ /* Link the created event with its associated enabler. */
+ list_for_each_entry(event_priv, event_list_head, node) {
+ struct lttng_kernel_event_common *event = event_priv->pub;
struct lttng_enabler_ref *enabler_ref;
- if (!lttng_event_enabler_match_event(&event_enabler->parent, &event_recorder->parent))
+ if (!lttng_event_enabler_match_event(event_enabler, event))
continue;
- enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head,
- lttng_event_recorder_enabler_as_enabler(event_enabler));
- if (!enabler_ref) {
- /*
- * If no backward ref, create it.
- * Add backward ref from event to event_enabler.
- */
- enabler_ref = kzalloc(sizeof(*enabler_ref), GFP_KERNEL);
- if (!enabler_ref)
- return -ENOMEM;
- enabler_ref->ref = lttng_event_recorder_enabler_as_enabler(event_enabler);
- list_add(&enabler_ref->node,
- &event_recorder_priv->parent.enablers_ref_head);
- }
-
- /*
- * Link filter bytecodes if not linked yet.
- */
- lttng_enabler_link_bytecode(event_recorder_priv->parent.desc,
- lttng_static_ctx,
- &event_recorder_priv->parent.filter_bytecode_runtime_head,
- <tng_event_recorder_enabler_as_enabler(event_enabler)->filter_bytecode_head);
- }
- return 0;
-}
-/*
- * Create event_notifiers associated with a event_notifier enabler (if not already present).
- */
-static
-int lttng_event_notifier_enabler_ref_event_notifiers(
- struct lttng_event_notifier_enabler *event_notifier_enabler)
-{
- struct lttng_kernel_event_notifier_private *event_notifier_priv;
- struct list_head *event_list_head = lttng_get_event_list_head_from_enabler(&event_notifier_enabler->parent);
-
- lttng_syscall_table_set_wildcard_all(&event_notifier_enabler->parent);
-
- /* First ensure that probe event_notifiers are created for this enabler. */
- lttng_create_event_if_missing(&event_notifier_enabler->parent);
-
- /* Link the created event_notifier with its associated enabler. */
- list_for_each_entry(event_notifier_priv, event_list_head, parent.node) {
- struct lttng_kernel_event_notifier *event_notifier = event_notifier_priv->pub;
- struct lttng_enabler_ref *enabler_ref;
-
- if (!lttng_event_enabler_match_event(&event_notifier_enabler->parent, &event_notifier->parent))
- continue;
-
- enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head,
- lttng_event_notifier_enabler_as_enabler(event_notifier_enabler));
+ enabler_ref = lttng_enabler_ref(&event_priv->enablers_ref_head, event_enabler);
if (!enabler_ref) {
/*
* If no backward ref, create it.
if (!enabler_ref)
return -ENOMEM;
- enabler_ref->ref = lttng_event_notifier_enabler_as_enabler(
- event_notifier_enabler);
- list_add(&enabler_ref->node,
- &event_notifier_priv->parent.enablers_ref_head);
+ enabler_ref->ref = event_enabler;
+ list_add(&enabler_ref->node, &event_priv->enablers_ref_head);
}
- /*
- * Link filter bytecodes if not linked yet.
- */
- lttng_enabler_link_bytecode(event_notifier_priv->parent.desc,
- lttng_static_ctx, &event_notifier_priv->parent.filter_bytecode_runtime_head,
- <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head);
-
- lttng_event_enabler_init_event_capture(&event_notifier_enabler->parent, &event_notifier->parent);
+ lttng_event_enabler_init_event_filter(event_enabler, event);
+ lttng_event_enabler_init_event_capture(event_enabler, event);
}
return 0;
}
return ret;
}
+static
+void lttng_event_sync_filter_state(struct lttng_kernel_event_common *event)
+{
+ int has_enablers_without_filter_bytecode = 0, nr_filters = 0;
+ struct lttng_kernel_bytecode_runtime *runtime;
+ struct lttng_enabler_ref *enabler_ref;
+
+ /* Check if has enablers without bytecode enabled */
+ list_for_each_entry(enabler_ref, &event->priv->enablers_ref_head, node) {
+ if (enabler_ref->ref->enabled
+ && list_empty(&enabler_ref->ref->filter_bytecode_head)) {
+ has_enablers_without_filter_bytecode = 1;
+ break;
+ }
+ }
+ event->priv->has_enablers_without_filter_bytecode = has_enablers_without_filter_bytecode;
+
+ /* Enable filters */
+ list_for_each_entry(runtime, &event->priv->filter_bytecode_runtime_head, node) {
+ lttng_bytecode_sync_state(runtime);
+ nr_filters++;
+ }
+ WRITE_ONCE(event->eval_filter, !(has_enablers_without_filter_bytecode || !nr_filters));
+}
+
+static
+void lttng_event_sync_capture_state(struct lttng_kernel_event_common *event)
+{
+ switch (event->type) {
+ case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
+ break;
+ case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
+ {
+ struct lttng_kernel_event_notifier *event_notifier =
+ container_of(event, struct lttng_kernel_event_notifier, parent);
+ struct lttng_kernel_bytecode_runtime *runtime;
+ int nr_captures = 0;
+
+ /* Enable captures */
+ list_for_each_entry(runtime, &event_notifier->priv->capture_bytecode_runtime_head, node) {
+ lttng_bytecode_sync_state(runtime);
+ nr_captures++;
+ }
+ WRITE_ONCE(event_notifier->eval_capture, !!nr_captures);
+ break;
+ }
+ default:
+ WARN_ON_ONCE(1);
+ }
+}
+
/*
* lttng_session_sync_event_enablers should be called just before starting a
* session.
struct lttng_kernel_event_recorder_private *event_recorder_priv;
list_for_each_entry(event_enabler, &session->priv->enablers_head, node)
- lttng_event_enabler_ref_events(event_enabler);
+ lttng_event_enabler_ref_events(&event_enabler->parent);
/*
* For each event, if at least one of its enablers is enabled,
* and its channel and session transient states are enabled, we
list_for_each_entry(event_recorder_priv, &session->priv->events, parent.node) {
struct lttng_kernel_event_recorder *event_recorder = event_recorder_priv->pub;
struct lttng_enabler_ref *enabler_ref;
- struct lttng_kernel_bytecode_runtime *runtime;
- int enabled = 0, has_enablers_without_filter_bytecode = 0;
- int nr_filters = 0;
+ int enabled = 0;
switch (event_recorder_priv->parent.instrumentation) {
case LTTNG_KERNEL_ABI_TRACEPOINT:
_lttng_event_unregister(&event_recorder->parent);
}
- /* Check if has enablers without bytecode enabled */
- list_for_each_entry(enabler_ref,
- &event_recorder_priv->parent.enablers_ref_head, node) {
- if (enabler_ref->ref->enabled
- && list_empty(&enabler_ref->ref->filter_bytecode_head)) {
- has_enablers_without_filter_bytecode = 1;
- break;
- }
- }
- event_recorder_priv->parent.has_enablers_without_filter_bytecode =
- has_enablers_without_filter_bytecode;
-
- /* Enable filters */
- list_for_each_entry(runtime,
- &event_recorder_priv->parent.filter_bytecode_runtime_head, node) {
- lttng_bytecode_sync_state(runtime);
- nr_filters++;
- }
- WRITE_ONCE(event_recorder_priv->parent.pub->eval_filter,
- !(has_enablers_without_filter_bytecode || !nr_filters));
+ lttng_event_sync_filter_state(&event_recorder_priv->pub->parent);
}
}
struct lttng_kernel_event_notifier_private *event_notifier_priv;
list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node)
- lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler);
+ lttng_event_enabler_ref_events(&event_notifier_enabler->parent);
/*
* For each event_notifier, if at least one of its enablers is enabled,
list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, parent.node) {
struct lttng_kernel_event_notifier *event_notifier = event_notifier_priv->pub;
struct lttng_enabler_ref *enabler_ref;
- struct lttng_kernel_bytecode_runtime *runtime;
- int enabled = 0, has_enablers_without_filter_bytecode = 0;
- int nr_filters = 0, nr_captures = 0;
+ int enabled = 0;
switch (event_notifier_priv->parent.instrumentation) {
case LTTNG_KERNEL_ABI_TRACEPOINT:
_lttng_event_unregister(&event_notifier->parent);
}
- /* Check if has enablers without bytecode enabled */
- list_for_each_entry(enabler_ref,
- &event_notifier_priv->parent.enablers_ref_head, node) {
- if (enabler_ref->ref->enabled
- && list_empty(&enabler_ref->ref->filter_bytecode_head)) {
- has_enablers_without_filter_bytecode = 1;
- break;
- }
- }
- event_notifier_priv->parent.has_enablers_without_filter_bytecode =
- has_enablers_without_filter_bytecode;
-
- /* Enable filters */
- list_for_each_entry(runtime,
- &event_notifier_priv->parent.filter_bytecode_runtime_head, node) {
- lttng_bytecode_sync_state(runtime);
- nr_filters++;
- }
- WRITE_ONCE(event_notifier_priv->parent.pub->eval_filter,
- !(has_enablers_without_filter_bytecode || !nr_filters));
-
- /* Enable captures */
- list_for_each_entry(runtime,
- &event_notifier_priv->capture_bytecode_runtime_head, node) {
- lttng_bytecode_sync_state(runtime);
- nr_captures++;
- }
- WRITE_ONCE(event_notifier->eval_capture, !!nr_captures);
+ lttng_event_sync_filter_state(&event_notifier_priv->pub->parent);
+ lttng_event_sync_capture_state(&event_notifier_priv->pub->parent);
}
}
projects / lttng-modules.git / blobdiff