Implement capturing payload on event notifier

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

diff --git a/include/lttng/events.h b/include/lttng/events.h
index 3abdb80570f3015fc065fcdc1ed3bf4143b2729e..80de505056fe8a265d06c02f43717c92934fc0ea 100644 (file)
--- a/include/lttng/events.h
+++ b/include/lttng/events.h
@@ -234,6 +234,7 @@ enum lttng_event_type {
 
 enum lttng_bytecode_node_type {
        LTTNG_BYTECODE_NODE_TYPE_FILTER,
+       LTTNG_BYTECODE_NODE_TYPE_CAPTURE,
 };
 
 struct lttng_bytecode_node {
@@ -257,6 +258,8 @@ enum lttng_bytecode_interpreter_ret {
        /* Other bits are kept for future use. */
 };
 
+struct lttng_interpreter_output;
+
 struct lttng_bytecode_runtime {
        /* Associated bytecode */
        struct lttng_bytecode_node *bc;
@@ -264,6 +267,10 @@ struct lttng_bytecode_runtime {
                uint64_t (*filter)(void *filter_data,
                                struct lttng_probe_ctx *lttng_probe_ctx,
                                const char *filter_stack_data);
+               uint64_t (*capture)(void *filter_data,
+                               struct lttng_probe_ctx *lttng_probe_ctx,
+                               const char *capture_stack_data,
+                               struct lttng_interpreter_output *output);
        } interpreter_funcs;
        int link_failed;
        struct list_head node;  /* list of bytecode runtime in event */
@@ -373,9 +380,13 @@ struct lttng_event_notifier {
        struct hlist_node hlist;        /* session ht of event_notifiers */
        /* list of struct lttng_bytecode_runtime, sorted by seqnum */
        struct list_head filter_bytecode_runtime_head;
+       size_t num_captures;
+       struct list_head capture_bytecode_runtime_head;
        int has_enablers_without_bytecode;
 
-       void (*send_notification)(struct lttng_event_notifier *event_notifier);
+       void (*send_notification)(struct lttng_event_notifier *event_notifier,
+                       struct lttng_probe_ctx *lttng_probe_ctx,
+                       const char *interpreter_stack_data);
        struct lttng_event_notifier_group *group; /* Weak ref */
 };
 
@@ -417,8 +428,13 @@ struct lttng_event_notifier_enabler {
        struct lttng_enabler base;
        struct list_head node;  /* List of event_notifier enablers */
        struct lttng_event_notifier_group *group;
+
+       /* head list of struct lttng_bytecode_node */
+       struct list_head capture_bytecode_head;
+       uint64_t num_captures;
 };
 
+
 static inline
 struct lttng_enabler *lttng_event_enabler_as_enabler(
                struct lttng_event_enabler *event_enabler)
@@ -900,6 +916,9 @@ int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event
 int lttng_event_notifier_enabler_attach_filter_bytecode(
                struct lttng_event_notifier_enabler *event_notifier_enabler,
                struct lttng_kernel_filter_bytecode __user *bytecode);
+int lttng_event_notifier_enabler_attach_capture_bytecode(
+               struct lttng_event_notifier_enabler *event_notifier_enabler,
+               struct lttng_kernel_capture_bytecode __user *bytecode);
 
 void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
                struct lttng_ctx *ctx,