Add serialization function

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

diff --git a/ltt-events.h b/ltt-events.h
index d205cdb079ecfc88858b2b45270f0f5b118bb013..ab90bad3d842ed892847184852de4140115cddf9 100644 (file)
--- a/ltt-events.h
+++ b/ltt-events.h
@@ -1,3 +1,6 @@
+#ifndef _LTT_EVENTS_H
+#define _LTT_EVENTS_H
+
 /*
  * ltt-events.h
  *
@@ -7,9 +10,11 @@
  */
 
 #include <linux/list.h>
+#include "ltt-debugfs-abi.h"
 
 struct ltt_channel;
 struct ltt_session;
+struct lib_ring_buffer_ctx;
 
 /*
  * ltt_event structure is referred to by the tracing fast path. It must be
@@ -18,37 +23,77 @@ struct ltt_session;
 struct ltt_event {
        unsigned int id;
        struct ltt_channel *chan;
+       void *probe;
        void *filter;
        char *name;
+       enum instrum_type itype;
        struct list_head list;          /* Event list */
 };
 
+struct ltt_channel_ops {
+       struct channel *(*channel_create)(const char *name,
+                               struct ltt_session *session,
+                               void *buf_addr,
+                               size_t subbuf_size, size_t num_subbuf,
+                               unsigned int switch_timer_interval,
+                               unsigned int read_timer_interval);
+       void (*channel_destroy)(struct channel *chan);
+       struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan);
+       void (*buffer_read_close)(struct lib_ring_buffer *buf);
+       int (*event_reserve)(struct lib_ring_buffer_ctx *ctx);
+       void (*event_commit)(struct lib_ring_buffer_ctx *ctx);
+       void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src,
+                           size_t len);
+};
+
 struct ltt_channel {
        struct channel *chan;           /* Channel buffers */
        /* Event ID management */
        struct ltt_session *session;
-       atomic_t free_event_id;         /* Next event ID to allocate */
+       struct file *file;              /* File associated to channel */
+       unsigned int free_event_id;     /* Next event ID to allocate */
        struct list_head list;          /* Channel list */
-       char name[PATH_MAX];
+       wait_queue_head_t notify_wait;  /* Channel addition notif. waitqueue */
+       struct ltt_channel_ops *ops;
 };
 
 struct ltt_session {
+       int active;                     /* Is trace session active ? */
+       struct file *file;              /* File associated to session */
        struct list_head chan;          /* Channel list head */
        struct list_head events;        /* Event list head */
        struct list_head list;          /* Session list */
-       char name[PATH_MAX];
 };
 
-struct ltt_session *ltt_session_create(char *name);
-int ltt_session_destroy(struct ltt_session *session);
+struct ltt_transport {
+       char *name;
+       struct module *owner;
+       struct list_head node;
+       struct ltt_channel_ops ops;
+};
 
-struct ltt_channel *ltt_channel_create(struct ltt_session *session, char *name,
+struct ltt_session *ltt_session_create(void);
+int ltt_session_start(struct ltt_session *session);
+int ltt_session_stop(struct ltt_session *session);
+void ltt_session_destroy(struct ltt_session *session);
+
+struct ltt_channel *ltt_channel_create(struct ltt_session *session,
                                       int overwrite, void *buf_addr,
                                       size_t subbuf_size, size_t num_subbuf,
                                       unsigned int switch_timer_interval,
                                       unsigned int read_timer_interval);
-int _ltt_channel_destroy(struct ltt_channel *chan);
+void _ltt_channel_destroy(struct ltt_channel *chan);
 
-struct ltt_event *ltt_event_create(struct ltt_channel *chan, char *name,
-                                  void *filter);
+struct ltt_event *ltt_event_create(struct ltt_channel *chan,
+                                  char *name,
+                                  enum instrum_type itype,
+                                  void *probe, void *filter);
 int _ltt_event_destroy(struct ltt_event *event);
+
+void ltt_transport_register(struct ltt_transport *transport);
+void ltt_transport_unregister(struct ltt_transport *transport);
+
+int ltt_debugfs_abi_init(void);
+void ltt_debugfs_abi_exit(void);
+
+#endif /* _LTT_EVENTS_H */