__event_trigger_test

/*
 * Helper function for event_trigger_unlock_commit{_regs}().
 * If there are event triggers attached to this event that requires
 * filtering against its fields, then they wil be called as the
 * entry already holds the field information of the current event.
 *
 * It also checks if the event should be discarded or not.
 * It is to be discarded if the event is soft disabled and the
 * event was only recorded to process triggers, or if the event
 * filter is active and this event did not match the filters.
 *
 * Returns true if the event is discarded, false otherwise.
 */
static inline bool
__event_trigger_test_discard(struct trace_event_file *file,
                 struct ring_buffer *buffer,
                 struct ring_buffer_event *event,
                 void *entry,
                 enum event_trigger_type *tt)
{
    unsigned long eflags = file->flags;
 
    if (eflags & EVENT_FILE_FL_TRIGGER_COND)
        *tt = event_triggers_call(file, entry, event);
 
    if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags) ||
        (unlikely(file->flags & EVENT_FILE_FL_FILTERED) &&
         !filter_match_preds(file->filter, entry))) {
        __trace_event_discard_commit(buffer, event);
        return true;
    }
 
    return false;
}
函数源码
