centralize sessiond config option handling

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

diff --git a/src/bin/lttng-sessiond/lttng-sessiond.h b/src/bin/lttng-sessiond/lttng-sessiond.h
index 79e7fcb4383b1765a870a44c2c6576f5c6c7b92c..bcc4259871c1ad0196799aa1ea1ec1b2db300775 100644 (file)
--- a/src/bin/lttng-sessiond/lttng-sessiond.h
+++ b/src/bin/lttng-sessiond/lttng-sessiond.h
@@ -1,41 +1,47 @@
 /*
  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2013 - Raphaël Beamonte <raphael.beamonte@gmail.com>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; only version 2
- * of the License.
+ * 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
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ * 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 _LTT_SESSIOND_H
 #define _LTT_SESSIOND_H
 
-#define _LGPL_SOURCE
 #include <urcu.h>
-#include <urcu/wfqueue.h>
+#include <urcu/wfcqueue.h>
 
 #include <common/sessiond-comm/sessiond-comm.h>
+#include <common/compat/poll.h>
 #include <common/compat/socket.h>
 
 #include "session.h"
 #include "ust-app.h"
-
-const char *module_proc_lttng = "/proc/lttng";
+#include "version.h"
+#include "notification-thread.h"
+#include "sessiond-config.h"
 
 extern const char default_home_dir[],
        default_tracing_group[],
        default_ust_sock_dir[],
        default_global_apps_pipe[];
 
+/* Set in main.c at boot time of the daemon */
+extern int kernel_tracer_fd;
+
+extern struct notification_thread_handle *notification_thread_handle;
+
 /*
  * This contains extra data needed for processing a command received by the
  * session daemon from the lttng client.
@@ -52,16 +58,72 @@ struct command_ctx {
 struct ust_command {
        int sock;
        struct ust_register_msg reg_msg;
-       struct cds_wfq_node node;
+       struct cds_wfcq_node node;
 };
 
 /*
- * Queue used to enqueue UST registration request (ust_commant) and protected
+ * Queue used to enqueue UST registration request (ust_command) and synchronized
  * by a futex with a scheme N wakers / 1 waiters. See futex.c/.h
  */
 struct ust_cmd_queue {
        int32_t futex;
-       struct cds_wfq_queue queue;
+       struct cds_wfcq_head head;
+       struct cds_wfcq_tail tail;
+};
+
+/*
+ * This is the wait queue containing wait nodes during the application
+ * registration process.
+ */
+struct ust_reg_wait_queue {
+       unsigned long count;
+       struct cds_list_head head;
 };
 
+/*
+ * Use by the dispatch registration to queue UST command socket to wait for the
+ * notify socket.
+ */
+struct ust_reg_wait_node {
+       struct ust_app *app;
+       struct cds_list_head head;
+};
+
+/*
+ * This pipe is used to inform the thread managing application notify
+ * communication that a command is queued and ready to be processed.
+ */
+extern int apps_cmd_notify_pipe[2];
+
+/*
+ * Used to notify that a hash table needs to be destroyed by dedicated
+ * thread. Required by design because we don't want to move destroy
+ * paths outside of large RCU read-side lock paths, and destroy cannot
+ * be called by call_rcu thread, because it may hang (waiting for
+ * call_rcu completion).
+ */
+extern int ht_cleanup_pipe[2];
+
+/*
+ * Populated when the daemon starts with the current page size of the system.
+ */
+extern long page_size;
+
+/* Application health monitoring */
+extern struct health_app *health_sessiond;
+
+/*
+ * Section name to look for in the daemon configuration file.
+ */
+extern const char * const config_section_name;
+
+/* Is this daemon root or not. */
+extern int is_root;
+
+extern struct sessiond_config config;
+
+int sessiond_check_thread_quit_pipe(int fd, uint32_t events);
+int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size);
+void sessiond_notify_ready(void);
+
 #endif /* _LTT_SESSIOND_H */