Separate session info from channel info in notification thread

[lttng-tools.git] / src / bin / lttng-sessiond / notification-thread-internal.h

diff --git a/src/bin/lttng-sessiond/notification-thread-internal.h b/src/bin/lttng-sessiond/notification-thread-internal.h
new file mode 100644 (file)
index 0000000..8149e2c
--- /dev/null
+++ b/src/bin/lttng-sessiond/notification-thread-internal.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@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.
+ *
+ * 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.
+ *
+ * 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 NOTIFICATION_THREAD_INTERNAL_H
+#define NOTIFICATION_THREAD_INTERNAL_H
+
+#include <lttng/ref-internal.h>
+#include <urcu/rculfhash.h>
+#include <unistd.h>
+
+struct channel_key {
+       uint64_t key;
+       enum lttng_domain_type domain;
+};
+
+struct session_info {
+       struct lttng_ref ref;
+       char *name;
+       uid_t uid;
+       gid_t gid;
+       /*
+        * Back-ref (weak) to all channels in this session.
+        * The hashtable's key is a hash of (struct channel_key) and
+        * the value is of type (struct channel_info *).
+        */
+       struct cds_lfht *channel_infos_ht;
+       /* Node in the notification thread state's sessions_ht. */
+       struct cds_lfht_node sessions_ht_node;
+};
+
+struct channel_info {
+       struct channel_key key;
+       char *name;
+       uint64_t capacity;
+       /*
+        * A channel info holds a reference (lttng_ref) on session_info.
+        * session_info, in return, holds a weak reference to the channel.
+        */
+       struct session_info *session_info;
+       /* Node in the notification thread state's channels_ht. */
+       struct cds_lfht_node channels_ht_node;
+       /* Node in the session_info's channels_ht. */
+       struct cds_lfht_node session_info_channels_ht_node;
+};
+
+#endif /* NOTIFICATION_THREAD_INTERNAL_H */