relayd: implement file and session rotation on top of trace chunks

[lttng-tools.git] / src / common / index / index.h

diff --git a/src/common/index/index.h b/src/common/index/index.h
index 58f2ac70add96ac8eb5be5195bff1773683c8a2c..b5ffc314998b483acbb9f0df47da5e2fcef10a45 100644 (file)
--- a/src/common/index/index.h
+++ b/src/common/index/index.h
@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
  *                      David Goulet <dgoulet@efficios.com>
+ *               2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License, version 2 only, as
@@ -20,11 +21,39 @@
 #define _INDEX_H
 
 #include <inttypes.h>
+#include <urcu/ref.h>
 
-#include "lttng-index.h"
+#include <common/trace-chunk.h>
+#include "ctf-index.h"
 
-int index_create_file(char *path_name, char *stream_name, int uid, int gid,
-               uint64_t size, uint64_t count);
-int index_write(int fd, struct lttng_packet_index *index, size_t len);
+struct lttng_index_file {
+       int fd;
+       uint32_t major;
+       uint32_t minor;
+       uint32_t element_len;
+       struct lttng_trace_chunk *trace_chunk;
+       struct urcu_ref ref;
+};
+
+/*
+ * create and open have refcount of 1. Use put to decrement the
+ * refcount. Destroys when reaching 0. Use "get" to increment refcount.
+ */
+struct lttng_index_file *lttng_index_file_create_from_trace_chunk(
+               struct lttng_trace_chunk *chunk,
+               const char *channel_path, char *stream_name,
+               uint64_t stream_file_size, uint64_t stream_count,
+               uint32_t index_major, uint32_t index_minor,
+               bool unlink_existing_file);
+struct lttng_index_file *lttng_index_file_open(const char *path_name,
+               const char *channel_name, uint64_t tracefile_count,
+               uint64_t tracefile_count_current);
+int lttng_index_file_write(const struct lttng_index_file *index_file,
+               const struct ctf_packet_index *element);
+int lttng_index_file_read(const struct lttng_index_file *index_file,
+               struct ctf_packet_index *element);
+
+void lttng_index_file_get(struct lttng_index_file *index_file);
+void lttng_index_file_put(struct lttng_index_file *index_file);
 
 #endif /* _INDEX_H */