Fix: add missing rcu read side lock

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

diff --git a/src/bin/lttng-sessiond/session.h b/src/bin/lttng-sessiond/session.h
index 6264e14ac4f0b6430fd06f9960e0c9915e539fa2..8a3504f43b925c5389a69682e57e9be2c735a46a 100644 (file)
--- a/src/bin/lttng-sessiond/session.h
+++ b/src/bin/lttng-sessiond/session.h
@@ -1,26 +1,23 @@
 /*
  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
  *
- * 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
  * 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_SESSION_H
 #define _LTT_SESSION_H
 
-#include <pthread.h>
-#include <unistd.h>
 #include <urcu/list.h>
 
 #include "trace-kernel.h"
@@ -34,19 +31,19 @@
  */
 struct ltt_session_list {
        /*
-        * This lock protects any read/write access to the list and count (which is
-        * basically the list size). All public functions in session.c acquire this
-        * lock and release it before returning. If none of those functions are
-        * used, the lock MUST be acquired in order to iterate or/and do any
-        * actions on that list.
+        * This lock protects any read/write access to the list and
+        * next_uuid. All public functions in session.c acquire this
+        * lock and release it before returning. If none of those
+        * functions are used, the lock MUST be acquired in order to
+        * iterate or/and do any actions on that list.
         */
        pthread_mutex_t lock;
 
        /*
-        * Number of element in the list. The session list lock MUST be acquired if
-        * this counter is used when iterating over the session list.
+        * Session unique ID generator. The session list lock MUST be
+        * upon update and read of this counter.
         */
-       unsigned int count;
+       unsigned int next_uuid;
 
        /* Linked list head */
        struct cds_list_head head;
@@ -69,10 +66,28 @@ struct ltt_session {
        pthread_mutex_t lock;
        struct cds_list_head list;
        int enabled;    /* enabled/started flag */
-       int id;         /* session unique identifier */
+       unsigned int id;                /* session unique identifier */
        /* UID/GID of the user owning the session */
        uid_t uid;
        gid_t gid;
+       /*
+        * Network session handle. A value of 0 means that there is no remote
+        * session established.
+        */
+       uint64_t net_handle;
+       /*
+        * This consumer is only set when the create_session_uri call is made.
+        * This contains the temporary information for a consumer output. Upon
+        * creation of the UST or kernel session, this consumer, if available, is
+        * copied into those sessions.
+        */
+       struct consumer_output *consumer;
+
+       /* Indicates whether or not we have to spawn consumer(s) */
+       unsigned int start_consumer;
+
+       /* Did a start command occured before the kern/ust session creation? */
+       unsigned int started;
 };
 
 /* Prototypes */
@@ -87,4 +102,6 @@ void session_unlock_list(void);
 struct ltt_session *session_find_by_name(char *name);
 struct ltt_session_list *session_get_list(void);
 
+int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid);
+
 #endif /* _LTT_SESSION_H */