Add the sessiond notification-handling subsystem

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

diff --git a/src/bin/lttng-sessiond/notification-thread-commands.h b/src/bin/lttng-sessiond/notification-thread-commands.h
new file mode 100644 (file)
index 0000000..fc7e90b
--- /dev/null
+++ b/src/bin/lttng-sessiond/notification-thread-commands.h
@@ -0,0 +1,94 @@
+/*
+ * 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_COMMANDS_H
+#define NOTIFICATION_THREAD_COMMANDS_H
+
+#include <lttng/domain.h>
+#include <lttng/lttng-error.h>
+#include <urcu/rculfhash.h>
+#include "notification-thread.h"
+
+struct notification_thread_data;
+struct lttng_trigger;
+
+enum notification_thread_command_type {
+       NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER,
+       NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER,
+       NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL,
+       NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL,
+       NOTIFICATION_COMMAND_TYPE_QUIT,
+};
+
+struct channel_key {
+       uint64_t key;
+       enum lttng_domain_type domain;
+};
+
+struct channel_info {
+       struct channel_key key;
+       char *session_name;
+       uid_t uid;
+       gid_t gid;
+       char *channel_name;
+       uint64_t capacity;
+       struct cds_lfht_node channels_ht_node;
+};
+
+struct notification_thread_command {
+       struct cds_list_head cmd_list_node;
+
+       enum notification_thread_command_type type;
+       union {
+               /* Register/Unregister trigger. */
+               struct lttng_trigger *trigger;
+               /* Add channel. */
+               struct channel_info add_channel;
+               /* Remove channel. */
+               struct {
+                       uint64_t key;
+                       enum lttng_domain_type domain;
+               } remove_channel;
+       } parameters;
+
+       /* Futex on which to wait for command reply (optional). */
+       int32_t reply_futex;
+       enum lttng_error_code reply_code;
+};
+
+enum lttng_error_code notification_thread_command_register_trigger(
+               struct notification_thread_handle *handle,
+               struct lttng_trigger *trigger);
+
+enum lttng_error_code notification_thread_command_unregister_trigger(
+               struct notification_thread_handle *handle,
+               struct lttng_trigger *trigger);
+
+enum lttng_error_code notification_thread_command_add_channel(
+               struct notification_thread_handle *handle,
+               char *session_name, uid_t uid, gid_t gid,
+               char *channel_name, uint64_t key,
+               enum lttng_domain_type domain, uint64_t capacity);
+
+enum lttng_error_code notification_thread_command_remove_channel(
+               struct notification_thread_handle *handle,
+               uint64_t key, enum lttng_domain_type domain);
+
+void notification_thread_command_quit(
+               struct notification_thread_handle *handle);
+
+#endif /* NOTIFICATION_THREAD_COMMANDS_H */