Filter: use only single lower bit of filter return value

[lttng-ust.git] / include / lttng / ust-events.h

diff --git a/include/lttng/ust-events.h b/include/lttng/ust-events.h
index e45a6a7187621afc1a09175cacf68409cbc52f23..331506bd69d838a0c77075489ec3830b859dbe86 100644 (file)
--- a/include/lttng/ust-events.h
+++ b/include/lttng/ust-events.h
@@ -291,14 +291,27 @@ struct lttng_event;
 
 struct lttng_ust_filter_bytecode_node {
        struct cds_list_head node;
-       struct lttng_ust_filter_bytecode bc;
        struct lttng_enabler *enabler;
+       /*
+        * struct lttng_ust_filter_bytecode has var. sized array, must
+        * be last field.
+        */
+       struct lttng_ust_filter_bytecode bc;
+};
+
+/*
+ * Filter return value masks.
+ */
+enum lttng_filter_ret {
+       LTTNG_FILTER_DISCARD = 0,
+       LTTNG_FILTER_RECORD_FLAG = (1ULL << 0),
+       /* Other bits are kept for future use. */
 };
 
 struct lttng_bytecode_runtime {
        /* Associated bytecode */
        struct lttng_ust_filter_bytecode_node *bc;
-       int (*filter)(void *filter_data, const char *filter_stack_data);
+       uint64_t (*filter)(void *filter_data, const char *filter_stack_data);
        int link_failed;
        struct cds_list_head node;      /* list of bytecode runtime in event */
 };