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

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *               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.
 *
 * 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
#define _DEFAULTS_H

#include <pthread.h>
#include <common/macros.h>

/* Default unix group name for tracing. */
#define DEFAULT_TRACING_GROUP                   "tracing"

/*
 * This value is defined in the CTF specification (see
 * git://git.efficios.com/ctf.git in the file
 * common-trace-format-specification.txt.
 */
#define DEFAULT_METADATA_NAME                   "metadata"

/* Environment variable to set session daemon binary path. */
#define DEFAULT_SESSIOND_PATH_ENV               "LTTNG_SESSIOND_PATH"

/* Environment variable to set man pager binary path. */
#define DEFAULT_MAN_BIN_PATH_ENV                "LTTNG_MAN_BIN_PATH"

/* Default man pager binary path. */
#define DEFAULT_MAN_BIN_PATH                    "/usr/bin/man"

/* Default trace output directory name */
#define DEFAULT_TRACE_DIR_NAME                  "lttng-traces"

/* Default size of a hash table */
#define DEFAULT_HT_SIZE                         4

/* Default session daemon paths */
#define DEFAULT_HOME_DIR						"/tmp"
#define DEFAULT_UST_SOCK_DIR                    DEFAULT_HOME_DIR "/ust-app-socks"
#define DEFAULT_GLOBAL_APPS_PIPE                DEFAULT_UST_SOCK_DIR "/global"
#define DEFAULT_TRACE_OUTPUT                    DEFAULT_HOME_DIR "/lttng"

/* Default directory where the trace are written in per domain */
#define DEFAULT_KERNEL_TRACE_DIR                "/kernel"
#define DEFAULT_UST_TRACE_DIR                   "/ust"

/* Subpath for per PID or UID sessions. */
#define DEFAULT_UST_TRACE_PID_PATH               "/pid"
#define DEFAULT_UST_TRACE_UID_PATH               "/uid/%d/%u-bit"

/*
 * Default session name for the lttng command line. This default value will
 * get the date and time appended (%Y%m%d-%H%M%S) to it.
 */
#define DEFAULT_SESSION_NAME                    "auto"

/* Default consumer paths */
#define DEFAULT_CONSUMERD_RUNDIR                "%s"

/* Kernel consumer path */
#define DEFAULT_KCONSUMERD_PATH                 DEFAULT_CONSUMERD_RUNDIR "/kconsumerd"
#define DEFAULT_KCONSUMERD_CMD_SOCK_PATH        DEFAULT_KCONSUMERD_PATH "/command"
#define DEFAULT_KCONSUMERD_ERR_SOCK_PATH        DEFAULT_KCONSUMERD_PATH "/error"

/* UST 64-bit consumer path */
#define DEFAULT_USTCONSUMERD64_PATH             DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd64"
#define DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH    DEFAULT_USTCONSUMERD64_PATH "/command"
#define DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH    DEFAULT_USTCONSUMERD64_PATH "/error"

/* UST 32-bit consumer path */
#define DEFAULT_USTCONSUMERD32_PATH             DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd32"
#define DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH    DEFAULT_USTCONSUMERD32_PATH "/command"
#define DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH    DEFAULT_USTCONSUMERD32_PATH "/error"

/* Relayd path */
#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 accomodate 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"
#define DEFAULT_LTTNG_RUNDIR                    CONFIG_LTTNG_SYSTEM_RUNDIR
#define DEFAULT_LTTNG_HOME_RUNDIR               "%s/.lttng"
#define DEFAULT_LTTNG_SESSIOND_PIDFILE          "lttng-sessiond.pid"
#define DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE   "agent.port"
#define DEFAULT_LTTNG_SESSIOND_LOCKFILE         "lttng-sessiond.lck"

/* Default probes list */
#define DEFAULT_LTTNG_KMOD_PROBES		"LTTNG_KMOD_PROBES"

/* Default extra probes list */
#define DEFAULT_LTTNG_EXTRA_KMOD_PROBES		"LTTNG_EXTRA_KMOD_PROBES"

/* Default unix socket path */
#define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK         DEFAULT_LTTNG_RUNDIR "/client-lttng-sessiond"
#define DEFAULT_HOME_CLIENT_UNIX_SOCK           DEFAULT_LTTNG_HOME_RUNDIR "/client-lttng-sessiond"
#define DEFAULT_GLOBAL_HEALTH_UNIX_SOCK         DEFAULT_LTTNG_RUNDIR "/sessiond-health"
#define DEFAULT_HOME_HEALTH_UNIX_SOCK		DEFAULT_LTTNG_HOME_RUNDIR "/sessiond-health"

/* Default consumer health unix socket path */
#define DEFAULT_GLOBAL_USTCONSUMER32_HEALTH_UNIX_SOCK	DEFAULT_LTTNG_RUNDIR "/ustconsumerd32/health"
#define DEFAULT_HOME_USTCONSUMER32_HEALTH_UNIX_SOCK	DEFAULT_LTTNG_HOME_RUNDIR "/ustconsumerd32/health"
#define DEFAULT_GLOBAL_USTCONSUMER64_HEALTH_UNIX_SOCK	DEFAULT_LTTNG_RUNDIR "/ustconsumerd64/health"
#define DEFAULT_HOME_USTCONSUMER64_HEALTH_UNIX_SOCK	DEFAULT_LTTNG_HOME_RUNDIR "/ustconsumerd64/health"
#define DEFAULT_GLOBAL_KCONSUMER_HEALTH_UNIX_SOCK	DEFAULT_LTTNG_RUNDIR "/kconsumerd/health"
#define DEFAULT_HOME_KCONSUMER_HEALTH_UNIX_SOCK		DEFAULT_LTTNG_HOME_RUNDIR "/kconsumerd/health"

/* Default relay health unix socket path */
#define DEFAULT_GLOBAL_RELAY_HEALTH_UNIX_SOCK		DEFAULT_LTTNG_RUNDIR "/relayd/health-%d"
#define DEFAULT_HOME_RELAY_HEALTH_UNIX_SOCK		DEFAULT_LTTNG_HOME_RUNDIR "/relayd/health-%d"

/* Default daemon configuration file path */
#define DEFAULT_SYSTEM_CONFIGPATH               CONFIG_LTTNG_SYSTEM_CONFIGDIR \
	"/lttng"

#define DEFAULT_DAEMON_CONFIG_FILE              "lttng.conf"
#define DEFAULT_DAEMON_HOME_CONFIGPATH          DEFAULT_LTTNG_HOME_RUNDIR "/" \
	DEFAULT_DAEMON_CONFIG_FILE
#define DEFAULT_DAEMON_SYSTEM_CONFIGPATH        DEFAULT_SYSTEM_CONFIGPATH "/" \
	DEFAULT_DAEMON_CONFIG_FILE

/* Default session configuration file path */
#define DEFAULT_SESSION_PATH                    "sessions"
/* Auto load session in that directory. */
#define DEFAULT_SESSION_CONFIG_AUTOLOAD         "auto"
#define DEFAULT_SESSION_HOME_CONFIGPATH         DEFAULT_LTTNG_HOME_RUNDIR "/" \
	DEFAULT_SESSION_PATH
#define DEFAULT_SESSION_SYSTEM_CONFIGPATH       DEFAULT_SYSTEM_CONFIGPATH "/" \
	DEFAULT_SESSION_PATH
#define DEFAULT_SESSION_CONFIG_FILE_EXTENSION   ".lttng"
#define DEFAULT_SESSION_CONFIG_XSD_FILENAME     "session.xsd"
#define DEFAULT_SESSION_CONFIG_XSD_PATH         CONFIG_LTTNG_SYSTEM_DATADIR "/xml/lttng/"
#define DEFAULT_SESSION_CONFIG_XSD_PATH_ENV     "LTTNG_SESSION_CONFIG_XSD_PATH"

#define DEFAULT_GLOBAL_APPS_UNIX_SOCK \
	DEFAULT_LTTNG_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
#define DEFAULT_HOME_APPS_UNIX_SOCK \
	DEFAULT_LTTNG_HOME_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
#define DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH \
	"/" LTTNG_UST_WAIT_FILENAME
#define DEFAULT_HOME_APPS_WAIT_SHM_PATH \
	DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH "-%d"

/*
 * Value taken from the hard limit allowed by the kernel when using setrlimit
 * with RLIMIT_NOFILE on an Intel i7 CPU and Linux 3.0.3.
 */
#define DEFAULT_POLL_SIZE 65535

/*
 * Format is %s_%d respectively channel name and CPU number. Eigth bytes
 * are added here to add space for the CPU number. I guess 2^8 CPUs is more
 * than enough. We might end up with quantum computing in a cell phone when
 * reaching this limit.
 */
#define DEFAULT_STREAM_NAME_LEN        LTTNG_SYMBOL_NAME_LEN + 8

/* Default channel attributes */
#define DEFAULT_CHANNEL_NAME            "channel0"
/* Default JUL domain channel name. */
#define DEFAULT_JUL_CHANNEL_NAME        "lttng_jul_channel"
/* Default JUL tracepoint name. This is a wildcard for the JUL domain. */
#define DEFAULT_JUL_EVENT_COMPONENT     "lttng_jul"
#define DEFAULT_JUL_EVENT_NAME          DEFAULT_JUL_EVENT_COMPONENT ":*"

/* Default log4j domain channel name. */
#define DEFAULT_LOG4J_CHANNEL_NAME        "lttng_log4j_channel"
/* Default log4j tracepoint name. This is a wildcard for the log4j domain. */
#define DEFAULT_LOG4J_EVENT_COMPONENT     "lttng_log4j"
#define DEFAULT_LOG4J_EVENT_NAME          DEFAULT_LOG4J_EVENT_COMPONENT ":*"

/* Default Python domain channel name. */
#define DEFAULT_PYTHON_CHANNEL_NAME       "lttng_python_channel"
/* Default Python tracepoint name. This is a wildcard for the python domain. */
#define DEFAULT_PYTHON_EVENT_COMPONENT    "lttng_python"
#define DEFAULT_PYTHON_EVENT_NAME         DEFAULT_PYTHON_EVENT_COMPONENT ":*"

#define DEFAULT_CHANNEL_OVERWRITE       -1
#define DEFAULT_CHANNEL_TRACEFILE_SIZE  CONFIG_DEFAULT_CHANNEL_TRACEFILE_SIZE
#define DEFAULT_CHANNEL_TRACEFILE_COUNT CONFIG_DEFAULT_CHANNEL_TRACEFILE_COUNT

#define _DEFAULT_CHANNEL_SUBBUF_SIZE   CONFIG_DEFAULT_CHANNEL_SUBBUF_SIZE
#define _DEFAULT_CHANNEL_OUTPUT			LTTNG_EVENT_MMAP

/* Metadata channel defaults. */
#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

/* Kernel has different defaults */

/* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
#define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE	CONFIG_DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE
/*
 * DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2.
 * Update help manually if override.
 */
#define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM	CONFIG_DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM
/* See lttng-kernel.h enum lttng_kernel_output for channel output */
#define DEFAULT_KERNEL_CHANNEL_OUTPUT			LTTNG_EVENT_SPLICE
#define DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER	CONFIG_DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER
#define DEFAULT_KERNEL_CHANNEL_READ_TIMER	CONFIG_DEFAULT_KERNEL_CHANNEL_READ_TIMER
#define DEFAULT_KERNEL_CHANNEL_LIVE_TIMER	CONFIG_DEFAULT_KERNEL_CHANNEL_LIVE_TIMER

/* User space defaults */

/* Must be a power of 2 */
#define DEFAULT_UST_PID_CHANNEL_SUBBUF_SIZE	CONFIG_DEFAULT_UST_PID_CHANNEL_SUBBUF_SIZE
#define DEFAULT_UST_UID_CHANNEL_SUBBUF_SIZE	CONFIG_DEFAULT_UST_UID_CHANNEL_SUBBUF_SIZE
/* Must be a power of 2. Update help manuall if override. */
#define DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM	CONFIG_DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM
#define DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM	CONFIG_DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM
/* See lttng-ust.h enum lttng_ust_output */
#define DEFAULT_UST_PID_CHANNEL_OUTPUT			_DEFAULT_CHANNEL_OUTPUT
#define DEFAULT_UST_UID_CHANNEL_OUTPUT			_DEFAULT_CHANNEL_OUTPUT
/* Timers in usec. */
#define DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER	CONFIG_DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER
#define DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER	CONFIG_DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER
#define DEFAULT_UST_PID_CHANNEL_LIVE_TIMER	CONFIG_DEFAULT_UST_PID_CHANNEL_LIVE_TIMER
#define DEFAULT_UST_UID_CHANNEL_LIVE_TIMER	CONFIG_DEFAULT_UST_UID_CHANNEL_LIVE_TIMER

#define DEFAULT_UST_PID_CHANNEL_READ_TIMER      CONFIG_DEFAULT_UST_PID_CHANNEL_READ_TIMER
#define DEFAULT_UST_UID_CHANNEL_READ_TIMER      CONFIG_DEFAULT_UST_UID_CHANNEL_READ_TIMER

/*
 * Default timeout value for the sem_timedwait() call. Blocking forever is not
 * wanted so a timeout is used to control the data flow and not freeze the
 * session daemon.
 */
#define DEFAULT_SEM_WAIT_TIMEOUT            30    /* in seconds */

/* Default bind addresses for network services. */
#define DEFAULT_NETWORK_CONTROL_BIND_ADDRESS    CONFIG_DEFAULT_NETWORK_CONTROL_BIND_ADDRESS
#define DEFAULT_NETWORK_DATA_BIND_ADDRESS      	CONFIG_DEFAULT_NETWORK_DATA_BIND_ADDRESS
#define DEFAULT_NETWORK_VIEWER_BIND_ADDRESS     CONFIG_DEFAULT_NETWORK_VIEWER_BIND_ADDRESS
#define DEFAULT_AGENT_BIND_ADDRESS              CONFIG_DEFAULT_AGENT_BIND_ADDRESS

/* Default network ports for trace streaming support. */
#define DEFAULT_NETWORK_CONTROL_PORT        CONFIG_DEFAULT_NETWORK_CONTROL_PORT
#define DEFAULT_NETWORK_DATA_PORT           CONFIG_DEFAULT_NETWORK_DATA_PORT
#define DEFAULT_NETWORK_VIEWER_PORT         CONFIG_DEFAULT_NETWORK_VIEWER_PORT

/* Agent registration TCP port. */
#define DEFAULT_AGENT_TCP_PORT              CONFIG_DEFAULT_AGENT_TCP_PORT

/*
 * If a thread stalls for this amount of time, it will be considered bogus (bad
 * health).
 */
#define DEFAULT_HEALTH_CHECK_DELTA_S        20
#define DEFAULT_HEALTH_CHECK_DELTA_NS       0

/*
 * Wait period before retrying the lttng_data_pending command in the lttng
 * stop command of liblttng-ctl.
 */
#define DEFAULT_DATA_AVAILABILITY_WAIT_TIME 200000  /* usec */

/*
 * Wait period before retrying the lttng_consumer_flushed_cache when
 * the consumer receives metadata.
 */
#define DEFAULT_METADATA_AVAILABILITY_WAIT_TIME 200000  /* usec */

/*
 * The usual value for the maximum TCP SYN retries time and TCP FIN timeout is
 * 180 and 60 seconds on most Linux system and the default value since kernel
 * 2.2 thus using the highest value. See tcp(7) for more details.
 */
#define DEFAULT_INET_TCP_TIMEOUT			180	/* sec */

/* Maximum payload size for a control connection */

#define DEFAULT_NETWORK_RELAYD_CTRL_MAX_PAYLOAD_SIZE 134217728

/*
 * Default receiving and sending timeout for an application socket.
 */
#define DEFAULT_APP_SOCKET_RW_TIMEOUT       CONFIG_DEFAULT_APP_SOCKET_RW_TIMEOUT
#define DEFAULT_APP_SOCKET_TIMEOUT_ENV      "LTTNG_APP_SOCKET_TIMEOUT"

#define DEFAULT_UST_STREAM_FD_NUM			2 /* Number of fd per UST stream. */

#define DEFAULT_SNAPSHOT_NAME				"snapshot"
#define DEFAULT_SNAPSHOT_MAX_SIZE			0 /* Unlimited. */

/* Suffix of an index file. */
#define DEFAULT_INDEX_FILE_SUFFIX			".idx"
#define DEFAULT_INDEX_DIR					"index"

/* Default lttng command live timer value in usec. */
#define DEFAULT_LTTNG_LIVE_TIMER			CONFIG_DEFAULT_LTTNG_LIVE_TIMER

/* Default runas worker name */
#define DEFAULT_RUN_AS_WORKER_NAME			"lttng-runas"

/* Default LTTng MI XML namespace. */
#define DEFAULT_LTTNG_MI_NAMESPACE		"https://lttng.org/xml/ns/lttng-mi"

/* Default thread stack size; the default mandated by pthread_create(3) */
#define DEFAULT_LTTNG_THREAD_STACK_SIZE		2097152

#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE"
#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_IDLE_TIME_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_IDLE_TIME"
#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_MAX_PROBE_COUNT_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_MAX_PROBE_COUNT"
#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_PROBE_INTERVAL_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_PROBE_INTERVAL"
#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_ABORT_THRESHOLD_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_ABORT_THRESHOLD"

#define DEFAULT_LTTNG_RELAYD_WORKING_DIRECTORY_ENV "LTTNG_RELAYD_WORKING_DIRECTORY"

/*
 * Returns the default subbuf size.
 *
 * This function depends on a value that is set at constructor time, so it is
 * unsafe to call it from another constructor.
 */
LTTNG_HIDDEN
size_t default_get_channel_subbuf_size(void);

/*
 * Returns the default metadata subbuf size.
 *
 * This function depends on a value that is set at constructor time, so it is
 * unsafe to call it from another constructor.
 */
LTTNG_HIDDEN
size_t default_get_metadata_subbuf_size(void);

/*
 * Returns the default subbuf size for the kernel domain.
 *
 * This function depends on a value that is set at constructor time, so it is
 * unsafe to call it from another constructor.
 */
LTTNG_HIDDEN
size_t default_get_kernel_channel_subbuf_size(void);

/*
 * Returns the default subbuf size for the UST domain per PID.
 *
 * This function depends on a value that is set at constructor time, so it is
 * unsafe to call it from another constructor.
 */
LTTNG_HIDDEN
size_t default_get_ust_pid_channel_subbuf_size(void);

/*
 * Returns the default subbuf size for the UST domain per UID.
 *
 * This function depends on a value that is set at constructor time, so it is
 * unsafe to call it from another constructor.
 */
LTTNG_HIDDEN
size_t default_get_ust_uid_channel_subbuf_size(void);

/*
 * Get the default pthread_attr to use on thread creation.
 *
 * Some libc, such as musl, don't honor the limit set for the stack size and use
 * their own empirically chosen static value. This function checks if the
 * current stack size is smaller than the stack size limit and if so returns a
 * pthread_attr_t pointer where the thread stack size is set to the soft stack
 * size limit.
 */
LTTNG_HIDDEN
pthread_attr_t *default_pthread_attr(void);

#endif /* _DEFAULTS_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	4	* 2015 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License, version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	18	*/
	19
	20	#ifndef _DEFAULTS_H
	21	#define _DEFAULTS_H
	22
	23	#include <pthread.h>
	24	#include <common/macros.h>
	25
	26	/* Default unix group name for tracing. */
	27	#define DEFAULT_TRACING_GROUP "tracing"
	28
	29	/*
	30	* This value is defined in the CTF specification (see
	31	* git://git.efficios.com/ctf.git in the file
	32	* common-trace-format-specification.txt.
	33	*/
	34	#define DEFAULT_METADATA_NAME "metadata"
	35
	36	/* Environment variable to set session daemon binary path. */
	37	#define DEFAULT_SESSIOND_PATH_ENV "LTTNG_SESSIOND_PATH"
	38
	39	/* Environment variable to set man pager binary path. */
	40	#define DEFAULT_MAN_BIN_PATH_ENV "LTTNG_MAN_BIN_PATH"
	41
	42	/* Default man pager binary path. */
	43	#define DEFAULT_MAN_BIN_PATH "/usr/bin/man"
	44
	45	/* Default trace output directory name */
	46	#define DEFAULT_TRACE_DIR_NAME "lttng-traces"
	47
	48	/* Default size of a hash table */
	49	#define DEFAULT_HT_SIZE 4
	50
	51	/* Default session daemon paths */
	52	#define DEFAULT_HOME_DIR "/tmp"
	53	#define DEFAULT_UST_SOCK_DIR DEFAULT_HOME_DIR "/ust-app-socks"
	54	#define DEFAULT_GLOBAL_APPS_PIPE DEFAULT_UST_SOCK_DIR "/global"
	55	#define DEFAULT_TRACE_OUTPUT DEFAULT_HOME_DIR "/lttng"
	56
	57	/* Default directory where the trace are written in per domain */
	58	#define DEFAULT_KERNEL_TRACE_DIR "/kernel"
	59	#define DEFAULT_UST_TRACE_DIR "/ust"
	60
	61	/* Subpath for per PID or UID sessions. */
	62	#define DEFAULT_UST_TRACE_PID_PATH "/pid"
	63	#define DEFAULT_UST_TRACE_UID_PATH "/uid/%d/%u-bit"
	64
	65	/*
	66	* Default session name for the lttng command line. This default value will
	67	* get the date and time appended (%Y%m%d-%H%M%S) to it.
	68	*/
	69	#define DEFAULT_SESSION_NAME "auto"
	70
	71	/* Default consumer paths */
	72	#define DEFAULT_CONSUMERD_RUNDIR "%s"
	73
	74	/* Kernel consumer path */
	75	#define DEFAULT_KCONSUMERD_PATH DEFAULT_CONSUMERD_RUNDIR "/kconsumerd"
	76	#define DEFAULT_KCONSUMERD_CMD_SOCK_PATH DEFAULT_KCONSUMERD_PATH "/command"
	77	#define DEFAULT_KCONSUMERD_ERR_SOCK_PATH DEFAULT_KCONSUMERD_PATH "/error"
	78
	79	/* UST 64-bit consumer path */
	80	#define DEFAULT_USTCONSUMERD64_PATH DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd64"
	81	#define DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH DEFAULT_USTCONSUMERD64_PATH "/command"
	82	#define DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH DEFAULT_USTCONSUMERD64_PATH "/error"
	83
	84	/* UST 32-bit consumer path */
	85	#define DEFAULT_USTCONSUMERD32_PATH DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd32"
	86	#define DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH DEFAULT_USTCONSUMERD32_PATH "/command"
	87	#define DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH DEFAULT_USTCONSUMERD32_PATH "/error"
	88
	89	/* Relayd path */
	90	#define DEFAULT_RELAYD_RUNDIR "%s"
	91	#define DEFAULT_RELAYD_PATH DEFAULT_RELAYD_RUNDIR "/relayd"
	92
	93	#define DEFAULT_RELAYD_MIN_FD_POOL_SIZE 100
	94	/*
	95	* The file descriptor pool size needs a reserve buffer to accomodate the
	96	* indirect use of short-lived file descriptors. For instance, glibc will
	97	* create a socket (and thus, use an fd) during calls to gethostname() or
	98	* when querying the user's group. Other calls also probably make use of
	99	* short-lived FDs.
	100	*
	101	* The theoritical maximal reserve corresponds to the number of threads as,
	102	* in the worst case, they could all be making such calls.
	103	*
	104	* This value must be less than DEFAULT_RELAYD_MIN_FD_POOL_SIZE.
	105	*/
	106	#define DEFAULT_RELAYD_FD_POOL_SIZE_RESERVE 10
	107
	108	/* Default lttng run directory */
	109	#define DEFAULT_LTTNG_HOME_ENV_VAR "LTTNG_HOME"
	110	#define DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR "HOME"
	111	#define DEFAULT_LTTNG_RUNDIR CONFIG_LTTNG_SYSTEM_RUNDIR
	112	#define DEFAULT_LTTNG_HOME_RUNDIR "%s/.lttng"
	113	#define DEFAULT_LTTNG_SESSIOND_PIDFILE "lttng-sessiond.pid"
	114	#define DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE "agent.port"
	115	#define DEFAULT_LTTNG_SESSIOND_LOCKFILE "lttng-sessiond.lck"
	116
	117	/* Default probes list */
	118	#define DEFAULT_LTTNG_KMOD_PROBES "LTTNG_KMOD_PROBES"
	119
	120	/* Default extra probes list */
	121	#define DEFAULT_LTTNG_EXTRA_KMOD_PROBES "LTTNG_EXTRA_KMOD_PROBES"
	122
	123	/* Default unix socket path */
	124	#define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/client-lttng-sessiond"
	125	#define DEFAULT_HOME_CLIENT_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/client-lttng-sessiond"
	126	#define DEFAULT_GLOBAL_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/sessiond-health"
	127	#define DEFAULT_HOME_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/sessiond-health"
	128
	129	/* Default consumer health unix socket path */
	130	#define DEFAULT_GLOBAL_USTCONSUMER32_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/ustconsumerd32/health"
	131	#define DEFAULT_HOME_USTCONSUMER32_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/ustconsumerd32/health"
	132	#define DEFAULT_GLOBAL_USTCONSUMER64_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/ustconsumerd64/health"
	133	#define DEFAULT_HOME_USTCONSUMER64_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/ustconsumerd64/health"
	134	#define DEFAULT_GLOBAL_KCONSUMER_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/kconsumerd/health"
	135	#define DEFAULT_HOME_KCONSUMER_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/kconsumerd/health"
	136
	137	/* Default relay health unix socket path */
	138	#define DEFAULT_GLOBAL_RELAY_HEALTH_UNIX_SOCK DEFAULT_LTTNG_RUNDIR "/relayd/health-%d"
	139	#define DEFAULT_HOME_RELAY_HEALTH_UNIX_SOCK DEFAULT_LTTNG_HOME_RUNDIR "/relayd/health-%d"
	140
	141	/* Default daemon configuration file path */
	142	#define DEFAULT_SYSTEM_CONFIGPATH CONFIG_LTTNG_SYSTEM_CONFIGDIR \
	143	"/lttng"
	144
	145	#define DEFAULT_DAEMON_CONFIG_FILE "lttng.conf"
	146	#define DEFAULT_DAEMON_HOME_CONFIGPATH DEFAULT_LTTNG_HOME_RUNDIR "/" \
	147	DEFAULT_DAEMON_CONFIG_FILE
	148	#define DEFAULT_DAEMON_SYSTEM_CONFIGPATH DEFAULT_SYSTEM_CONFIGPATH "/" \
	149	DEFAULT_DAEMON_CONFIG_FILE
	150
	151	/* Default session configuration file path */
	152	#define DEFAULT_SESSION_PATH "sessions"
	153	/* Auto load session in that directory. */
	154	#define DEFAULT_SESSION_CONFIG_AUTOLOAD "auto"
	155	#define DEFAULT_SESSION_HOME_CONFIGPATH DEFAULT_LTTNG_HOME_RUNDIR "/" \
	156	DEFAULT_SESSION_PATH
	157	#define DEFAULT_SESSION_SYSTEM_CONFIGPATH DEFAULT_SYSTEM_CONFIGPATH "/" \
	158	DEFAULT_SESSION_PATH
	159	#define DEFAULT_SESSION_CONFIG_FILE_EXTENSION ".lttng"
	160	#define DEFAULT_SESSION_CONFIG_XSD_FILENAME "session.xsd"
	161	#define DEFAULT_SESSION_CONFIG_XSD_PATH CONFIG_LTTNG_SYSTEM_DATADIR "/xml/lttng/"
	162	#define DEFAULT_SESSION_CONFIG_XSD_PATH_ENV "LTTNG_SESSION_CONFIG_XSD_PATH"
	163
	164	#define DEFAULT_GLOBAL_APPS_UNIX_SOCK \
	165	DEFAULT_LTTNG_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
	166	#define DEFAULT_HOME_APPS_UNIX_SOCK \
	167	DEFAULT_LTTNG_HOME_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
	168	#define DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH \
	169	"/" LTTNG_UST_WAIT_FILENAME
	170	#define DEFAULT_HOME_APPS_WAIT_SHM_PATH \
	171	DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH "-%d"
	172
	173	/*
	174	* Value taken from the hard limit allowed by the kernel when using setrlimit
	175	* with RLIMIT_NOFILE on an Intel i7 CPU and Linux 3.0.3.
	176	*/
	177	#define DEFAULT_POLL_SIZE 65535
	178
	179	/*
	180	* Format is %s_%d respectively channel name and CPU number. Eigth bytes
	181	* are added here to add space for the CPU number. I guess 2^8 CPUs is more
	182	* than enough. We might end up with quantum computing in a cell phone when
	183	* reaching this limit.
	184	*/
	185	#define DEFAULT_STREAM_NAME_LEN LTTNG_SYMBOL_NAME_LEN + 8
	186
	187	/* Default channel attributes */
	188	#define DEFAULT_CHANNEL_NAME "channel0"
	189	/* Default JUL domain channel name. */
	190	#define DEFAULT_JUL_CHANNEL_NAME "lttng_jul_channel"
	191	/* Default JUL tracepoint name. This is a wildcard for the JUL domain. */
	192	#define DEFAULT_JUL_EVENT_COMPONENT "lttng_jul"
	193	#define DEFAULT_JUL_EVENT_NAME DEFAULT_JUL_EVENT_COMPONENT ":*"
	194
	195	/* Default log4j domain channel name. */
	196	#define DEFAULT_LOG4J_CHANNEL_NAME "lttng_log4j_channel"
	197	/* Default log4j tracepoint name. This is a wildcard for the log4j domain. */
	198	#define DEFAULT_LOG4J_EVENT_COMPONENT "lttng_log4j"
	199	#define DEFAULT_LOG4J_EVENT_NAME DEFAULT_LOG4J_EVENT_COMPONENT ":*"
	200
	201	/* Default Python domain channel name. */
	202	#define DEFAULT_PYTHON_CHANNEL_NAME "lttng_python_channel"
	203	/* Default Python tracepoint name. This is a wildcard for the python domain. */
	204	#define DEFAULT_PYTHON_EVENT_COMPONENT "lttng_python"
	205	#define DEFAULT_PYTHON_EVENT_NAME DEFAULT_PYTHON_EVENT_COMPONENT ":*"
	206
	207	#define DEFAULT_CHANNEL_OVERWRITE -1
	208	#define DEFAULT_CHANNEL_TRACEFILE_SIZE CONFIG_DEFAULT_CHANNEL_TRACEFILE_SIZE
	209	#define DEFAULT_CHANNEL_TRACEFILE_COUNT CONFIG_DEFAULT_CHANNEL_TRACEFILE_COUNT
	210
	211	#define _DEFAULT_CHANNEL_SUBBUF_SIZE CONFIG_DEFAULT_CHANNEL_SUBBUF_SIZE
	212	#define _DEFAULT_CHANNEL_OUTPUT LTTNG_EVENT_MMAP
	213
	214	/* Metadata channel defaults. */
	215	#define DEFAULT_METADATA_SUBBUF_SIZE CONFIG_DEFAULT_METADATA_SUBBUF_SIZE
	216	#define DEFAULT_METADATA_SUBBUF_NUM CONFIG_DEFAULT_METADATA_SUBBUF_NUM
	217	#define DEFAULT_METADATA_CACHE_SIZE CONFIG_DEFAULT_METADATA_CACHE_SIZE
	218	#define DEFAULT_METADATA_SWITCH_TIMER CONFIG_DEFAULT_METADATA_SWITCH_TIMER
	219	#define DEFAULT_METADATA_READ_TIMER CONFIG_DEFAULT_METADATA_READ_TIMER
	220	#define DEFAULT_METADATA_OUTPUT _DEFAULT_CHANNEL_OUTPUT
	221
	222	/* Kernel has different defaults */
	223
	224	/* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
	225	#define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE CONFIG_DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE
	226	/*
	227	* DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2.
	228	* Update help manually if override.
	229	*/
	230	#define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM CONFIG_DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM
	231	/* See lttng-kernel.h enum lttng_kernel_output for channel output */
	232	#define DEFAULT_KERNEL_CHANNEL_OUTPUT LTTNG_EVENT_SPLICE
	233	#define DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER CONFIG_DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER
	234	#define DEFAULT_KERNEL_CHANNEL_READ_TIMER CONFIG_DEFAULT_KERNEL_CHANNEL_READ_TIMER
	235	#define DEFAULT_KERNEL_CHANNEL_LIVE_TIMER CONFIG_DEFAULT_KERNEL_CHANNEL_LIVE_TIMER
	236
	237	/* User space defaults */
	238
	239	/* Must be a power of 2 */
	240	#define DEFAULT_UST_PID_CHANNEL_SUBBUF_SIZE CONFIG_DEFAULT_UST_PID_CHANNEL_SUBBUF_SIZE
	241	#define DEFAULT_UST_UID_CHANNEL_SUBBUF_SIZE CONFIG_DEFAULT_UST_UID_CHANNEL_SUBBUF_SIZE
	242	/* Must be a power of 2. Update help manuall if override. */
	243	#define DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM CONFIG_DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM
	244	#define DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM CONFIG_DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM
	245	/* See lttng-ust.h enum lttng_ust_output */
	246	#define DEFAULT_UST_PID_CHANNEL_OUTPUT _DEFAULT_CHANNEL_OUTPUT
	247	#define DEFAULT_UST_UID_CHANNEL_OUTPUT _DEFAULT_CHANNEL_OUTPUT
	248	/* Timers in usec. */
	249	#define DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER CONFIG_DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER
	250	#define DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER CONFIG_DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER
	251	#define DEFAULT_UST_PID_CHANNEL_LIVE_TIMER CONFIG_DEFAULT_UST_PID_CHANNEL_LIVE_TIMER
	252	#define DEFAULT_UST_UID_CHANNEL_LIVE_TIMER CONFIG_DEFAULT_UST_UID_CHANNEL_LIVE_TIMER
	253
	254	#define DEFAULT_UST_PID_CHANNEL_READ_TIMER CONFIG_DEFAULT_UST_PID_CHANNEL_READ_TIMER
	255	#define DEFAULT_UST_UID_CHANNEL_READ_TIMER CONFIG_DEFAULT_UST_UID_CHANNEL_READ_TIMER
	256
	257	/*
	258	* Default timeout value for the sem_timedwait() call. Blocking forever is not
	259	* wanted so a timeout is used to control the data flow and not freeze the
	260	* session daemon.
	261	*/
	262	#define DEFAULT_SEM_WAIT_TIMEOUT 30 /* in seconds */
	263
	264	/* Default bind addresses for network services. */
	265	#define DEFAULT_NETWORK_CONTROL_BIND_ADDRESS CONFIG_DEFAULT_NETWORK_CONTROL_BIND_ADDRESS
	266	#define DEFAULT_NETWORK_DATA_BIND_ADDRESS CONFIG_DEFAULT_NETWORK_DATA_BIND_ADDRESS
	267	#define DEFAULT_NETWORK_VIEWER_BIND_ADDRESS CONFIG_DEFAULT_NETWORK_VIEWER_BIND_ADDRESS
	268	#define DEFAULT_AGENT_BIND_ADDRESS CONFIG_DEFAULT_AGENT_BIND_ADDRESS
	269
	270	/* Default network ports for trace streaming support. */
	271	#define DEFAULT_NETWORK_CONTROL_PORT CONFIG_DEFAULT_NETWORK_CONTROL_PORT
	272	#define DEFAULT_NETWORK_DATA_PORT CONFIG_DEFAULT_NETWORK_DATA_PORT
	273	#define DEFAULT_NETWORK_VIEWER_PORT CONFIG_DEFAULT_NETWORK_VIEWER_PORT
	274
	275	/* Agent registration TCP port. */
	276	#define DEFAULT_AGENT_TCP_PORT CONFIG_DEFAULT_AGENT_TCP_PORT
	277
	278	/*
	279	* If a thread stalls for this amount of time, it will be considered bogus (bad
	280	* health).
	281	*/
	282	#define DEFAULT_HEALTH_CHECK_DELTA_S 20
	283	#define DEFAULT_HEALTH_CHECK_DELTA_NS 0
	284
	285	/*
	286	* Wait period before retrying the lttng_data_pending command in the lttng
	287	* stop command of liblttng-ctl.
	288	*/
	289	#define DEFAULT_DATA_AVAILABILITY_WAIT_TIME 200000 /* usec */
	290
	291	/*
	292	* Wait period before retrying the lttng_consumer_flushed_cache when
	293	* the consumer receives metadata.
	294	*/
	295	#define DEFAULT_METADATA_AVAILABILITY_WAIT_TIME 200000 /* usec */
	296
	297	/*
	298	* The usual value for the maximum TCP SYN retries time and TCP FIN timeout is
	299	* 180 and 60 seconds on most Linux system and the default value since kernel
	300	* 2.2 thus using the highest value. See tcp(7) for more details.
	301	*/
	302	#define DEFAULT_INET_TCP_TIMEOUT 180 /* sec */
	303
	304	/* Maximum payload size for a control connection */
	305
	306	#define DEFAULT_NETWORK_RELAYD_CTRL_MAX_PAYLOAD_SIZE 134217728
	307
	308	/*
	309	* Default receiving and sending timeout for an application socket.
	310	*/
	311	#define DEFAULT_APP_SOCKET_RW_TIMEOUT CONFIG_DEFAULT_APP_SOCKET_RW_TIMEOUT
	312	#define DEFAULT_APP_SOCKET_TIMEOUT_ENV "LTTNG_APP_SOCKET_TIMEOUT"
	313
	314	#define DEFAULT_UST_STREAM_FD_NUM 2 /* Number of fd per UST stream. */
	315
	316	#define DEFAULT_SNAPSHOT_NAME "snapshot"
	317	#define DEFAULT_SNAPSHOT_MAX_SIZE 0 /* Unlimited. */
	318
	319	/* Suffix of an index file. */
	320	#define DEFAULT_INDEX_FILE_SUFFIX ".idx"
	321	#define DEFAULT_INDEX_DIR "index"
	322
	323	/* Default lttng command live timer value in usec. */
	324	#define DEFAULT_LTTNG_LIVE_TIMER CONFIG_DEFAULT_LTTNG_LIVE_TIMER
	325
	326	/* Default runas worker name */
	327	#define DEFAULT_RUN_AS_WORKER_NAME "lttng-runas"
	328
	329	/* Default LTTng MI XML namespace. */
	330	#define DEFAULT_LTTNG_MI_NAMESPACE "https://lttng.org/xml/ns/lttng-mi"
	331
	332	/* Default thread stack size; the default mandated by pthread_create(3) */
	333	#define DEFAULT_LTTNG_THREAD_STACK_SIZE 2097152
	334
	335	#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE"
	336	#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_IDLE_TIME_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_IDLE_TIME"
	337	#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_MAX_PROBE_COUNT_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_MAX_PROBE_COUNT"
	338	#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_PROBE_INTERVAL_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_PROBE_INTERVAL"
	339	#define DEFAULT_LTTNG_RELAYD_TCP_KEEP_ALIVE_ABORT_THRESHOLD_ENV "LTTNG_RELAYD_TCP_KEEP_ALIVE_ABORT_THRESHOLD"
	340
	341	#define DEFAULT_LTTNG_RELAYD_WORKING_DIRECTORY_ENV "LTTNG_RELAYD_WORKING_DIRECTORY"
	342
	343	/*
	344	* Returns the default subbuf size.
	345	*
	346	* This function depends on a value that is set at constructor time, so it is
	347	* unsafe to call it from another constructor.
	348	*/
	349	LTTNG_HIDDEN
	350	size_t default_get_channel_subbuf_size(void);
	351
	352	/*
	353	* Returns the default metadata subbuf size.
	354	*
	355	* This function depends on a value that is set at constructor time, so it is
	356	* unsafe to call it from another constructor.
	357	*/
	358	LTTNG_HIDDEN
	359	size_t default_get_metadata_subbuf_size(void);
	360
	361	/*
	362	* Returns the default subbuf size for the kernel domain.
	363	*
	364	* This function depends on a value that is set at constructor time, so it is
	365	* unsafe to call it from another constructor.
	366	*/
	367	LTTNG_HIDDEN
	368	size_t default_get_kernel_channel_subbuf_size(void);
	369
	370	/*
	371	* Returns the default subbuf size for the UST domain per PID.
	372	*
	373	* This function depends on a value that is set at constructor time, so it is
	374	* unsafe to call it from another constructor.
	375	*/
	376	LTTNG_HIDDEN
	377	size_t default_get_ust_pid_channel_subbuf_size(void);
	378
	379	/*
	380	* Returns the default subbuf size for the UST domain per UID.
	381	*
	382	* This function depends on a value that is set at constructor time, so it is
	383	* unsafe to call it from another constructor.
	384	*/
	385	LTTNG_HIDDEN
	386	size_t default_get_ust_uid_channel_subbuf_size(void);
	387
	388	/*
	389	* Get the default pthread_attr to use on thread creation.
	390	*
	391	* Some libc, such as musl, don't honor the limit set for the stack size and use
	392	* their own empirically chosen static value. This function checks if the
	393	* current stack size is smaller than the stack size limit and if so returns a
	394	* pthread_attr_t pointer where the thread stack size is set to the soft stack
	395	* size limit.
	396	*/
	397	LTTNG_HIDDEN
	398	pthread_attr_t *default_pthread_attr(void);
	399
	400	#endif /* _DEFAULTS_H */