sessiond: enforce mmap output type for kernel metadata channel

[lttng-tools.git] / src / common / defaults.h

diff --git a/src/common/defaults.h b/src/common/defaults.h
index 2c3e80f436d586f067339dad88f9b5c02f2db202..1e4b7fac7ab7d5d500ddd84985b76051dfefef49 100644 (file)
--- a/src/common/defaults.h
+++ b/src/common/defaults.h
@@ -1,20 +1,10 @@
 /*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *               2015 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2015 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.
+ * SPDX-License-Identifier: GPL-2.0-only
  *
- * 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 _DEFAULTS_H
@@ -93,6 +83,21 @@
 #define DEFAULT_RELAYD_RUNDIR                  "%s"
 #define DEFAULT_RELAYD_PATH                    DEFAULT_RELAYD_RUNDIR "/relayd"
 
+#define DEFAULT_RELAYD_MIN_FD_POOL_SIZE                100
+/*
+ * The file descriptor pool size needs a reserve buffer to accommodates the
+ * indirect use of short-lived file descriptors. For instance, glibc will
+ * create a socket (and thus, use an fd) during calls to gethostname() or
+ * when querying the user's group. Other calls also probably make use of
+ * short-lived FDs.
+ *
+ * The theoritical maximal reserve corresponds to the number of threads as,
+ * in the worst case, they could all be making such calls.
+ *
+ * This value must be less than DEFAULT_RELAYD_MIN_FD_POOL_SIZE.
+ */
+#define DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE    10
+
 /* Default lttng run directory */
 #define DEFAULT_LTTNG_HOME_ENV_VAR              "LTTNG_HOME"
 #define DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR    "HOME"
@@ -205,9 +210,10 @@
 #define DEFAULT_METADATA_SUBBUF_SIZE    CONFIG_DEFAULT_METADATA_SUBBUF_SIZE
 #define DEFAULT_METADATA_SUBBUF_NUM     CONFIG_DEFAULT_METADATA_SUBBUF_NUM
 #define DEFAULT_METADATA_CACHE_SIZE     CONFIG_DEFAULT_METADATA_CACHE_SIZE
-#define DEFAULT_METADATA_SWITCH_TIMER  CONFIG_DEFAULT_METADATA_SWITCH_TIMER
-#define DEFAULT_METADATA_READ_TIMER    CONFIG_DEFAULT_METADATA_READ_TIMER
-#define DEFAULT_METADATA_OUTPUT                        _DEFAULT_CHANNEL_OUTPUT
+#define DEFAULT_METADATA_SWITCH_TIMER  0
+#define DEFAULT_METADATA_READ_TIMER    0
+#define DEFAULT_METADATA_OVERWRITE     0
+#define DEFAULT_METADATA_OUTPUT                LTTNG_EVENT_MMAP
 
 /* Kernel has different defaults */
 
@@ -356,6 +362,7 @@
 #define DEFAULT_CHUNK_TMP_OLD_DIRECTORY                        ".tmp_old_chunk"
 #define DEFAULT_CHUNK_TMP_NEW_DIRECTORY                        ".tmp_new_chunk"
 #define DEFAULT_ARCHIVED_TRACE_CHUNKS_DIRECTORY                "archives"
+#define DEFAULT_UNLINKED_FILES_DIRECTORY               ".unlinked"
 
 /*
  * Default timer value in usec for the rotate pending polling check on the