src/common/defaults.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   3  *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License, version 2 only,
   7  * as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #ifndef _DEFAULTS_H
  20 #define _DEFAULTS_H
  21
  22 #include <config.h>
  23
  24 /* Default unix group name for tracing. */
  25 #define DEFAULT_TRACING_GROUP                   "tracing"
  26
  27 /*
  28  * This value is defined in the CTF specification (see
  29  * git://git.efficios.com/ctf.git in the file
  30  * common-trace-format-specification.txt.
  31  */
  32 #define DEFAULT_METADATA_NAME                   "metadata"
  33
  34 /* Environment variable to set session daemon binary path. */
  35 #define DEFAULT_SESSIOND_PATH_ENV               "LTTNG_SESSIOND_PATH"
  36
  37 /* Default trace output directory name */
  38 #define DEFAULT_TRACE_DIR_NAME                  "lttng-traces"
  39
  40 /* Default size of a hash table */
  41 #define DEFAULT_HT_SIZE                         4
  42
  43 /* Default session daemon paths */
  44 #define DEFAULT_HOME_DIR                                                "/tmp"
  45 #define DEFAULT_UST_SOCK_DIR                    DEFAULT_HOME_DIR "/ust-app-socks"
  46 #define DEFAULT_GLOBAL_APPS_PIPE                DEFAULT_UST_SOCK_DIR "/global"
  47 #define DEFAULT_TRACE_OUTPUT                    DEFAULT_HOME_DIR "/lttng"
  48
  49 /* Default directory where the trace are written in per domain */
  50 #define DEFAULT_KERNEL_TRACE_DIR                "/kernel"
  51 #define DEFAULT_UST_TRACE_DIR                   "/ust"
  52
  53 /* Subpath for per PID or UID sessions. */
  54 #define DEFAULT_UST_TRACE_PID_PATH               "/pid"
  55 #define DEFAULT_UST_TRACE_UID_PATH               "/uid/%d/%u-bit"
  56
  57 /*
  58  * Default session name for the lttng command line. This default value will
  59  * get the date and time appended (%Y%m%d-%H%M%S) to it.
  60  */
  61 #define DEFAULT_SESSION_NAME                    "auto"
  62
  63 /* Default consumer paths */
  64 #define DEFAULT_CONSUMERD_RUNDIR                "%s"
  65
  66 /* Kernel consumer path */
  67 #define DEFAULT_KCONSUMERD_PATH                 DEFAULT_CONSUMERD_RUNDIR "/kconsumerd"
  68 #define DEFAULT_KCONSUMERD_CMD_SOCK_PATH        DEFAULT_KCONSUMERD_PATH "/command"
  69 #define DEFAULT_KCONSUMERD_ERR_SOCK_PATH        DEFAULT_KCONSUMERD_PATH "/error"
  70
  71 /* UST 64-bit consumer path */
  72 #define DEFAULT_USTCONSUMERD64_PATH             DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd64"
  73 #define DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH    DEFAULT_USTCONSUMERD64_PATH "/command"
  74 #define DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH    DEFAULT_USTCONSUMERD64_PATH "/error"
  75
  76 /* UST 32-bit consumer path */
  77 #define DEFAULT_USTCONSUMERD32_PATH             DEFAULT_CONSUMERD_RUNDIR "/ustconsumerd32"
  78 #define DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH    DEFAULT_USTCONSUMERD32_PATH "/command"
  79 #define DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH    DEFAULT_USTCONSUMERD32_PATH "/error"
  80
  81 /* Relayd path */
  82 #define DEFAULT_RELAYD_RUNDIR                   "%s"
  83 #define DEFAULT_RELAYD_PATH                     DEFAULT_RELAYD_RUNDIR "/relayd"
  84
  85 /* Default lttng run directory */
  86 #define DEFAULT_LTTNG_HOME_ENV_VAR              "LTTNG_HOME"
  87 #define DEFAULT_LTTNG_FALLBACK_HOME_ENV_VAR     "HOME"
  88 #define DEFAULT_LTTNG_RUNDIR                    CONFIG_LTTNG_SYSTEM_RUNDIR
  89 #define DEFAULT_LTTNG_HOME_RUNDIR               "%s/.lttng"
  90 #define DEFAULT_LTTNG_SESSIOND_PIDFILE          "lttng-sessiond.pid"
  91
  92 /* Default unix socket path */
  93 #define DEFAULT_GLOBAL_CLIENT_UNIX_SOCK         DEFAULT_LTTNG_RUNDIR "/client-lttng-sessiond"
  94 #define DEFAULT_HOME_CLIENT_UNIX_SOCK           DEFAULT_LTTNG_HOME_RUNDIR "/client-lttng-sessiond"
  95 #define DEFAULT_GLOBAL_HEALTH_UNIX_SOCK         DEFAULT_LTTNG_RUNDIR "/sessiond-health"
  96 #define DEFAULT_HOME_HEALTH_UNIX_SOCK           DEFAULT_LTTNG_HOME_RUNDIR "/sessiond-health"
  97
  98 /* Default consumer health unix socket path */
  99 #define DEFAULT_GLOBAL_USTCONSUMER32_HEALTH_UNIX_SOCK   DEFAULT_LTTNG_RUNDIR "/ustconsumerd32/health"
 100 #define DEFAULT_HOME_USTCONSUMER32_HEALTH_UNIX_SOCK     DEFAULT_LTTNG_HOME_RUNDIR "/ustconsumerd32/health"
 101 #define DEFAULT_GLOBAL_USTCONSUMER64_HEALTH_UNIX_SOCK   DEFAULT_LTTNG_RUNDIR "/ustconsumerd64/health"
 102 #define DEFAULT_HOME_USTCONSUMER64_HEALTH_UNIX_SOCK     DEFAULT_LTTNG_HOME_RUNDIR "/ustconsumerd64/health"
 103 #define DEFAULT_GLOBAL_KCONSUMER_HEALTH_UNIX_SOCK       DEFAULT_LTTNG_RUNDIR "/kconsumerd/health"
 104 #define DEFAULT_HOME_KCONSUMER_HEALTH_UNIX_SOCK         DEFAULT_LTTNG_HOME_RUNDIR "/kconsumerd/health"
 105
 106 /* Default relay health unix socket path */
 107 #define DEFAULT_GLOBAL_RELAY_HEALTH_UNIX_SOCK           DEFAULT_LTTNG_RUNDIR "/relayd/health-%d"
 108 #define DEFAULT_HOME_RELAY_HEALTH_UNIX_SOCK             DEFAULT_LTTNG_HOME_RUNDIR "/relayd/health-%d"
 109
 110 #define DEFAULT_GLOBAL_APPS_UNIX_SOCK \
 111         DEFAULT_LTTNG_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
 112 #define DEFAULT_HOME_APPS_UNIX_SOCK \
 113         DEFAULT_LTTNG_HOME_RUNDIR "/" LTTNG_UST_SOCK_FILENAME
 114 #define DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH \
 115         "/" LTTNG_UST_WAIT_FILENAME
 116 #define DEFAULT_HOME_APPS_WAIT_SHM_PATH \
 117         DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH "-%d"
 118
 119 /*
 120  * Value taken from the hard limit allowed by the kernel when using setrlimit
 121  * with RLIMIT_NOFILE on an Intel i7 CPU and Linux 3.0.3.
 122  */
 123 #define DEFAULT_POLL_SIZE 65535
 124
 125 /*
 126  * Format is %s_%d respectively channel name and CPU number. Eigth bytes
 127  * are added here to add space for the CPU number. I guess 2^8 CPUs is more
 128  * than enough. We might end up with quantum computing in a cell phone when
 129  * reaching this limit.
 130  */
 131 #define DEFAULT_STREAM_NAME_LEN        LTTNG_SYMBOL_NAME_LEN + 8
 132
 133 /* Default channel attributes */
 134 #define DEFAULT_CHANNEL_NAME            "channel0"
 135 #define DEFAULT_CHANNEL_OVERWRITE       0
 136 #define DEFAULT_CHANNEL_TRACEFILE_SIZE  0
 137 #define DEFAULT_CHANNEL_TRACEFILE_COUNT 0
 138
 139 /* Must always be a power of 2 */
 140 #define _DEFAULT_CHANNEL_SUBBUF_SIZE    4096    /* bytes */
 141 /* Must always be a power of 2 */
 142 #define _DEFAULT_CHANNEL_SUBBUF_NUM             4
 143 #define _DEFAULT_CHANNEL_SWITCH_TIMER   0       /* usec */
 144 #define _DEFAULT_CHANNEL_LIVE_TIMER     0       /* usec */
 145 #define _DEFAULT_CHANNEL_READ_TIMER             200000  /* usec */
 146 #define _DEFAULT_CHANNEL_OUTPUT                 LTTNG_EVENT_MMAP
 147
 148 /* Metadata channel defaults. */
 149 #define DEFAULT_METADATA_SUBBUF_SIZE    4096
 150 #define DEFAULT_METADATA_SUBBUF_NUM     2
 151 #define DEFAULT_METADATA_CACHE_SIZE     4096
 152 #define DEFAULT_METADATA_SWITCH_TIMER   _DEFAULT_CHANNEL_SWITCH_TIMER
 153 #define DEFAULT_METADATA_READ_TIMER             0
 154 #define DEFAULT_METADATA_OUTPUT                 _DEFAULT_CHANNEL_OUTPUT
 155
 156 /* Kernel has different defaults */
 157
 158 /* DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE must always be a power of 2 */
 159 #define DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE              262144    /* bytes */
 160 /*
 161  * DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM must always be a power of 2.
 162  * Update help manually if override.
 163  */
 164 #define DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM               _DEFAULT_CHANNEL_SUBBUF_NUM
 165 /* See lttng-kernel.h enum lttng_kernel_output for channel output */
 166 #define DEFAULT_KERNEL_CHANNEL_OUTPUT                   LTTNG_EVENT_SPLICE
 167 #define DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER             _DEFAULT_CHANNEL_SWITCH_TIMER
 168 #define DEFAULT_KERNEL_CHANNEL_READ_TIMER               _DEFAULT_CHANNEL_READ_TIMER
 169 #define DEFAULT_KERNEL_CHANNEL_LIVE_TIMER               _DEFAULT_CHANNEL_LIVE_TIMER
 170
 171 /* User space defaults */
 172
 173 /* Must be a power of 2 */
 174 #define DEFAULT_UST_PID_CHANNEL_SUBBUF_SIZE             _DEFAULT_CHANNEL_SUBBUF_SIZE
 175 #define DEFAULT_UST_UID_CHANNEL_SUBBUF_SIZE             131072  /* bytes */
 176 /* Must be a power of 2. Update help manuall if override. */
 177 #define DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM              _DEFAULT_CHANNEL_SUBBUF_NUM
 178 #define DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM              _DEFAULT_CHANNEL_SUBBUF_NUM
 179 /* See lttng-ust.h enum lttng_ust_output */
 180 #define DEFAULT_UST_PID_CHANNEL_OUTPUT                  _DEFAULT_CHANNEL_OUTPUT
 181 #define DEFAULT_UST_UID_CHANNEL_OUTPUT                  _DEFAULT_CHANNEL_OUTPUT
 182 /* Timers in usec. */
 183 #define DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER    _DEFAULT_CHANNEL_SWITCH_TIMER
 184 #define DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER    _DEFAULT_CHANNEL_SWITCH_TIMER
 185 #define DEFAULT_UST_PID_CHANNEL_LIVE_TIMER      _DEFAULT_CHANNEL_LIVE_TIMER
 186 #define DEFAULT_UST_UID_CHANNEL_LIVE_TIMER      _DEFAULT_CHANNEL_LIVE_TIMER
 187
 188 #define DEFAULT_UST_PID_CHANNEL_READ_TIMER      0  /* usec */
 189 #define DEFAULT_UST_UID_CHANNEL_READ_TIMER      0  /* usec */
 190
 191 /*
 192  * Default timeout value for the sem_timedwait() call. Blocking forever is not
 193  * wanted so a timeout is used to control the data flow and not freeze the
 194  * session daemon.
 195  */
 196 #define DEFAULT_SEM_WAIT_TIMEOUT            30    /* in seconds */
 197
 198 /* Default network ports for trace streaming support */
 199 #define DEFAULT_NETWORK_CONTROL_PORT        5342
 200 #define DEFAULT_NETWORK_DATA_PORT           5343
 201 #define DEFAULT_NETWORK_VIEWER_PORT         5344
 202
 203 /*
 204  * If a thread stalls for this amount of time, it will be considered bogus (bad
 205  * health).
 206  */
 207 #define DEFAULT_HEALTH_CHECK_DELTA_S        20
 208 #define DEFAULT_HEALTH_CHECK_DELTA_NS       0
 209
 210 /*
 211  * Wait period before retrying the lttng_data_pending command in the lttng
 212  * stop command of liblttng-ctl.
 213  */
 214 #define DEFAULT_DATA_AVAILABILITY_WAIT_TIME 200000  /* usec */
 215
 216 /*
 217  * Wait period before retrying the lttng_consumer_flushed_cache when
 218  * the consumer receives metadata.
 219  */
 220 #define DEFAULT_METADATA_AVAILABILITY_WAIT_TIME 200000  /* usec */
 221
 222 /*
 223  * The usual value for the maximum TCP SYN retries time and TCP FIN timeout is
 224  * 180 and 60 seconds on most Linux system and the default value since kernel
 225  * 2.2 thus using the highest value. See tcp(7) for more details.
 226  */
 227 #define DEFAULT_INET_TCP_TIMEOUT                        180     /* sec */
 228
 229 /*
 230  * Default receiving and sending timeout for an application socket.
 231  */
 232 #define DEFAULT_APP_SOCKET_RW_TIMEOUT       5  /* sec */
 233 #define DEFAULT_APP_SOCKET_TIMEOUT_ENV      "LTTNG_APP_SOCKET_TIMEOUT"
 234
 235 #define DEFAULT_UST_STREAM_FD_NUM                       2 /* Number of fd per UST stream. */
 236
 237 #define DEFAULT_SNAPSHOT_NAME                           "snapshot"
 238 #define DEFAULT_SNAPSHOT_MAX_SIZE                       0 /* Unlimited. */
 239
 240 /* Suffix of an index file. */
 241 #define DEFAULT_INDEX_FILE_SUFFIX                       ".idx"
 242 #define DEFAULT_INDEX_DIR                                       "index"
 243
 244 extern size_t default_channel_subbuf_size;
 245 extern size_t default_metadata_subbuf_size;
 246 extern size_t default_ust_pid_channel_subbuf_size;
 247 extern size_t default_ust_uid_channel_subbuf_size;
 248 extern size_t default_kernel_channel_subbuf_size;
 249
 250 /*
 251  * Returns the default subbuf size.
 252  *
 253  * This function depends on a value that is set at constructor time, so it is
 254  * unsafe to call it from another constructor.
 255  */
 256 static inline
 257 size_t default_get_channel_subbuf_size(void)
 258 {
 259         return default_channel_subbuf_size;
 260 }
 261
 262 /*
 263  * Returns the default metadata subbuf size.
 264  *
 265  * This function depends on a value that is set at constructor time, so it is
 266  * unsafe to call it from another constructor.
 267  */
 268 static inline
 269 size_t default_get_metadata_subbuf_size(void)
 270 {
 271         return default_metadata_subbuf_size;
 272 }
 273
 274 /*
 275  * Returns the default subbuf size for the kernel domain.
 276  *
 277  * This function depends on a value that is set at constructor time, so it is
 278  * unsafe to call it from another constructor.
 279  */
 280 static inline
 281 size_t default_get_kernel_channel_subbuf_size(void)
 282 {
 283         return default_kernel_channel_subbuf_size;
 284 }
 285
 286 /*
 287  * Returns the default subbuf size for the UST domain per PID.
 288  *
 289  * This function depends on a value that is set at constructor time, so it is
 290  * unsafe to call it from another constructor.
 291  */
 292 static inline
 293 size_t default_get_ust_pid_channel_subbuf_size(void)
 294 {
 295         return default_ust_pid_channel_subbuf_size;
 296 }
 297
 298 /*
 299  * Returns the default subbuf size for the UST domain per UID.
 300  *
 301  * This function depends on a value that is set at constructor time, so it is
 302  * unsafe to call it from another constructor.
 303  */
 304 static inline
 305 size_t default_get_ust_uid_channel_subbuf_size(void)
 306 {
 307         return default_ust_uid_channel_subbuf_size;
 308 }
 309
 310 #endif /* _DEFAULTS_H */