Clean-up: relayd index: change spaces to tabs

[lttng-tools.git] / src / bin / lttng-relayd / ctf-trace.h

diff --git a/src/bin/lttng-relayd/ctf-trace.h b/src/bin/lttng-relayd/ctf-trace.h
index 66f7a15684b03d7ec0063f1702462bdf3cc03261..3afc00fe8bec7262b1ac078a3639c1fb4e07369f 100644 (file)
--- a/src/bin/lttng-relayd/ctf-trace.h
+++ b/src/bin/lttng-relayd/ctf-trace.h
@@ -1,41 +1,67 @@
+#ifndef _CTF_TRACE_H
+#define _CTF_TRACE_H
+
 /*
- * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
- *                      David Goulet <dgoulet@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
- * published by the Free Software Foundation.
+ * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
+ * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
+ * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
+ * SPDX-License-Identifier: GPL-2.0-only
  *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef _CTF_TRACE_H
-#define _CTF_TRACE_H
-
 #include <inttypes.h>
+#include <urcu/ref.h>
 
 #include <common/hashtable/hashtable.h>
 
-#include "lttng-relayd.h"
+#include "session.h"
+#include "stream.h"
+#include "viewer-stream.h"
 
 struct ctf_trace {
-       int refcount;
+       struct urcu_ref ref;            /* Every stream has a ref on the trace. */
+       struct relay_session *session;  /* Back ref to trace session */
+
+       /* Trace sub-folder relative to the session output path. */
+       char *path;
+
+       /*
+        * The ctf_trace lock nests inside the session lock.
+        */
+       pthread_mutex_t lock;
        uint64_t id;
-       uint64_t metadata_received;
-       uint64_t metadata_sent;
-       struct relay_stream *metadata_stream;
-       struct relay_viewer_stream *viewer_metadata_stream;
+       struct relay_viewer_stream *viewer_metadata_stream;     /* RCU protected */
+
+       /*
+        * Relay streams associated with this ctf trace.
+        * Updates are protected by the stream_list lock.
+        * Traversals are protected by RCU.
+        */
+       struct cds_list_head stream_list;
+       pthread_mutex_t stream_list_lock;
+
+       /*
+        * Node within session trace hash table. Node is indexed by
+        * stream path name.
+        */
+       struct lttng_ht_node_str node;
+       struct rcu_head rcu_node;       /* For call_rcu teardown. */
+
+       /*
+        * True if the metadata stream of this trace was sent the viewer in the
+        * past.
+        */
+       bool metadata_stream_sent_to_viewer;
 };
 
-void ctf_trace_assign(struct lttng_ht *ht, struct relay_stream *stream);
-struct ctf_trace *ctf_trace_create(void);
-void ctf_trace_try_destroy(struct ctf_trace *obj);
+struct ctf_trace *ctf_trace_get_by_path_or_create(struct relay_session *session,
+               const char *subpath);
+bool ctf_trace_get(struct ctf_trace *trace);
+void ctf_trace_put(struct ctf_trace *trace);
+
+int ctf_trace_close(struct ctf_trace *trace);
+
+struct relay_viewer_stream *ctf_trace_get_viewer_metadata_stream(struct ctf_trace *trace);
 
 #endif /* _CTF_TRACE_H */