sessiond: kernel triggers: add infrastructure to create event notifiers

[lttng-tools.git] / src / bin / lttng-sessiond / trace-kernel.h

diff --git a/src/bin/lttng-sessiond/trace-kernel.h b/src/bin/lttng-sessiond/trace-kernel.h
index dd6f21edf2bb06452d8f2c8f399d73aec65cf4ee..4b564ee4d44525207ff9d5f3fde77363a5f6dcb8 100644 (file)
--- a/src/bin/lttng-sessiond/trace-kernel.h
+++ b/src/bin/lttng-sessiond/trace-kernel.h
@@ -52,6 +52,20 @@ struct ltt_kernel_event {
        struct lttng_userspace_probe_location *userspace_probe_location;
 };
 
+/* Kernel event */
+struct ltt_kernel_event_notifier_rule {
+       int fd;
+       int enabled;
+       enum lttng_event_type type;
+       struct lttng_trigger *trigger;
+       uint64_t token;
+       const struct lttng_filter_bytecode *filter;
+       struct lttng_userspace_probe_location *userspace_probe_location;
+       struct cds_lfht_node ht_node;
+       /* call_rcu delayed reclaim. */
+       struct rcu_head rcu_node;
+};
+
 /* Kernel channel */
 struct ltt_kernel_channel {
        int fd;
@@ -150,8 +164,15 @@ struct ltt_kernel_stream *trace_kernel_create_stream(const char *name,
                unsigned int count);
 struct ltt_kernel_context *trace_kernel_create_context(
                struct lttng_kernel_context *ctx);
+enum lttng_error_code trace_kernel_create_event_notifier_rule(
+               struct lttng_trigger *trigger,
+               uint64_t token,
+               struct ltt_kernel_event_notifier_rule **event_notifier_rule);
 struct ltt_kernel_context *trace_kernel_copy_context(
                struct ltt_kernel_context *ctx);
+enum lttng_error_code trace_kernel_init_event_notifier_from_event_rule(
+               const struct lttng_event_rule *rule,
+               struct lttng_kernel_event_notifier *kernel_event_notifier);
 
 /*
  * Destroy functions free() the data structure and remove from linked list if
@@ -163,6 +184,7 @@ void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
 void trace_kernel_destroy_event(struct ltt_kernel_event *event);
 void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);
 void trace_kernel_destroy_context(struct ltt_kernel_context *ctx);
+void trace_kernel_destroy_event_notifier_rule(struct ltt_kernel_event_notifier_rule *rule);
 void trace_kernel_free_session(struct ltt_kernel_session *session);
 
 #endif /* _LTT_TRACE_KERNEL_H */