Implement clock plugin support

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

diff --git a/lttng-events.h b/lttng-events.h
index 4d1b54f907992a5a22dad8ce4ecc0f5172f135f6..921bc1fc8342d9b7d2be1479cb8d50d07ef33e3c 100644 (file)
--- a/lttng-events.h
+++ b/lttng-events.h
@@ -358,6 +358,12 @@ struct lttng_channel_ops {
        int (*current_timestamp) (const struct lib_ring_buffer_config *config,
                        struct lib_ring_buffer *bufb,
                        uint64_t *ts);
+       int (*sequence_number) (const struct lib_ring_buffer_config *config,
+                       struct lib_ring_buffer *bufb,
+                       uint64_t *seq);
+       int (*instance_id) (const struct lib_ring_buffer_config *config,
+                       struct lib_ring_buffer *bufb,
+                       uint64_t *id);
 };
 
 struct lttng_transport {
@@ -415,7 +421,7 @@ struct lttng_metadata_stream {
        wait_queue_head_t read_wait;    /* Reader buffer-level wait queue */
        struct list_head list;          /* Stream list */
        struct lttng_transport *transport;
-       struct mutex lock;
+       uint64_t version;               /* Current version of the metadata cache */
 };
 
 
@@ -461,6 +467,8 @@ struct lttng_metadata_cache {
        struct kref refcount;           /* Metadata cache usage */
        struct list_head metadata_stream;       /* Metadata stream list */
        uuid_le uuid;                   /* Trace session unique ID (copy) */
+       struct mutex lock;              /* Produce/consume lock */
+       uint64_t version;               /* Current version of the metadata */
 };
 
 void lttng_lock_sessions(void);
@@ -481,6 +489,7 @@ struct lttng_session *lttng_session_create(void);
 int lttng_session_enable(struct lttng_session *session);
 int lttng_session_disable(struct lttng_session *session);
 void lttng_session_destroy(struct lttng_session *session);
+int lttng_session_metadata_regenerate(struct lttng_session *session);
 void metadata_cache_destroy(struct kref *kref);
 
 struct lttng_channel *lttng_channel_create(struct lttng_session *session,
@@ -548,6 +557,9 @@ int lttng_session_untrack_pid(struct lttng_session *session, int pid);
 
 int lttng_session_list_tracker_pids(struct lttng_session *session);
 
+void lttng_clock_ref(void);
+void lttng_clock_unref(void);
+
 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
 int lttng_syscalls_register(struct lttng_channel *chan, void *filter);
 int lttng_syscalls_unregister(struct lttng_channel *chan);
@@ -605,6 +617,7 @@ void lttng_remove_context_field(struct lttng_ctx **ctx,
                                struct lttng_ctx_field *field);
 void lttng_destroy_context(struct lttng_ctx *ctx);
 int lttng_add_pid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx);
 int lttng_add_procname_to_ctx(struct lttng_ctx **ctx);
 int lttng_add_prio_to_ctx(struct lttng_ctx **ctx);
 int lttng_add_nice_to_ctx(struct lttng_ctx **ctx);
@@ -674,6 +687,8 @@ int lttng_kretprobes_register(const char *name,
                struct lttng_event *event_exit);
 void lttng_kretprobes_unregister(struct lttng_event *event);
 void lttng_kretprobes_destroy_private(struct lttng_event *event);
+int lttng_kretprobes_event_enable_state(struct lttng_event *event,
+       int enable);
 #else
 static inline
 int lttng_kretprobes_register(const char *name,
@@ -695,6 +710,13 @@ static inline
 void lttng_kretprobes_destroy_private(struct lttng_event *event)
 {
 }
+
+static inline
+int lttng_kretprobes_event_enable_state(struct lttng_event *event,
+       int enable)
+{
+       return -ENOSYS;
+}
 #endif
 
 #ifdef CONFIG_DYNAMIC_FTRACE