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 517d689b049f05d679fa4a205da31d2b20cb1e10..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 {
@@ -249,20 +250,28 @@ struct lttng_bytecode_node {
 };
 
 /*
- * Filter return value masks.
+ * Bytecode interpreter return value masks.
  */
-enum lttng_filter_ret {
-       LTTNG_FILTER_DISCARD = 0,
-       LTTNG_FILTER_RECORD_FLAG = (1ULL << 0),
+enum lttng_bytecode_interpreter_ret {
+       LTTNG_INTERPRETER_DISCARD = 0,
+       LTTNG_INTERPRETER_RECORD_FLAG = (1ULL << 0),
        /* Other bits are kept for future use. */
 };
 
+struct lttng_interpreter_output;
+
 struct lttng_bytecode_runtime {
        /* Associated bytecode */
        struct lttng_bytecode_node *bc;
-       uint64_t (*filter)(void *filter_data,
-                       struct lttng_probe_ctx *lttng_probe_ctx,
-                       const char *filter_stack_data);
+       union {
+               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 */
        struct lttng_ctx *ctx;
@@ -371,9 +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 */
 };
 
@@ -391,7 +404,7 @@ struct lttng_enabler {
 
        enum lttng_enabler_format_type format_type;
 
-       /* head list of struct lttng_ust_filter_bytecode_node */
+       /* head list of struct lttng_bytecode_node */
        struct list_head filter_bytecode_head;
 
        struct lttng_kernel_event event_param;
@@ -415,8 +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)
@@ -893,17 +911,19 @@ static inline int lttng_syscall_filter_disable_event_notifier(
 
 #endif
 
-void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime);
 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler,
                struct lttng_kernel_filter_bytecode __user *bytecode);
 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,
-               struct list_head *bytecode_runtime_head,
-               struct lttng_enabler *enabler);
+               struct list_head *instance_bytecode_runtime_head,
+               struct list_head *enabler_bytecode_runtime_head);
 
 int lttng_probes_init(void);