src/basic/constants.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #if !defined(HAS_FEATURE_MEMORY_SANITIZER)
   5 #  if defined(__has_feature)
   6 #    if __has_feature(memory_sanitizer)
   7 #      define HAS_FEATURE_MEMORY_SANITIZER 1
   8 #    endif
   9 #  endif
  10 #  if !defined(HAS_FEATURE_MEMORY_SANITIZER)
  11 #    define HAS_FEATURE_MEMORY_SANITIZER 0
  12 #  endif
  13 #endif
  14
  15 #if !defined(HAS_FEATURE_ADDRESS_SANITIZER)
  16 #  ifdef __SANITIZE_ADDRESS__
  17 #      define HAS_FEATURE_ADDRESS_SANITIZER 1
  18 #  elif defined(__has_feature)
  19 #    if __has_feature(address_sanitizer)
  20 #      define HAS_FEATURE_ADDRESS_SANITIZER 1
  21 #    endif
  22 #  endif
  23 #  if !defined(HAS_FEATURE_ADDRESS_SANITIZER)
  24 #    define HAS_FEATURE_ADDRESS_SANITIZER 0
  25 #  endif
  26 #endif
  27
  28 #define DEFAULT_RESTART_USEC (100*USEC_PER_MSEC)
  29
  30 /* Many different things, but also system unit start/stop */
  31 #define DEFAULT_TIMEOUT_USEC (DEFAULT_TIMEOUT_SEC*USEC_PER_SEC)
  32 /* User unit start/stop */
  33 #define DEFAULT_USER_TIMEOUT_USEC (DEFAULT_USER_TIMEOUT_SEC*USEC_PER_SEC)
  34 /* Timeout for user confirmation on the console */
  35 #define DEFAULT_CONFIRM_USEC (30*USEC_PER_SEC)
  36
  37 /* We use an extra-long timeout for the reload. This is because a reload or reexec means generators are rerun
  38  * which are timed out after DEFAULT_TIMEOUT_USEC. Let's use twice that time here, so that the generators can
  39  * have their timeout, and for everything else there's the same time budget in place. */
  40 #define DAEMON_RELOAD_TIMEOUT_SEC (DEFAULT_TIMEOUT_USEC * 2)
  41
  42 #define DEFAULT_START_LIMIT_INTERVAL (10*USEC_PER_SEC)
  43 #define DEFAULT_START_LIMIT_BURST 5
  44
  45 /* The default time after which exit-on-idle services exit. This
  46  * should be kept lower than the watchdog timeout, because otherwise
  47  * the watchdog pings will keep the loop busy. */
  48 #define DEFAULT_EXIT_USEC (30*USEC_PER_SEC)
  49
  50 /* The default value for the net.unix.max_dgram_qlen sysctl */
  51 #define DEFAULT_UNIX_MAX_DGRAM_QLEN 512
  52
  53 #define SIGNALS_CRASH_HANDLER SIGSEGV,SIGILL,SIGFPE,SIGBUS,SIGQUIT,SIGABRT
  54 #define SIGNALS_IGNORE SIGPIPE
  55
  56 #define NOTIFY_FD_MAX 768
  57 #define NOTIFY_BUFFER_MAX PIPE_BUF
  58
  59 /* Return a nulstr for a standard cascade of configuration paths, suitable to pass to
  60  * conf_files_list_nulstr() to implement drop-in directories for extending configuration files. */
  61 #define CONF_PATHS_NULSTR(n)                    \
  62         "/etc/" n "\0"                          \
  63         "/run/" n "\0"                          \
  64         "/usr/local/lib/" n "\0"                \
  65         "/usr/lib/" n "\0"
  66
  67 #define CONF_PATHS(n)                           \
  68         "/etc/" n,                              \
  69         "/run/" n,                              \
  70         "/usr/local/lib/" n,                    \
  71         "/usr/lib/" n
  72
  73 #define CONF_PATHS_STRV(n)                      \
  74         STRV_MAKE(CONF_PATHS(n))
  75
  76 /* The limit for PID 1 itself (which is not inherited to children) */
  77 #define HIGH_RLIMIT_MEMLOCK (1024ULL*1024ULL*64ULL)
  78
  79 /* Since kernel 5.16 the kernel default limit was raised to 8M. Let's adjust things on old kernels too, and
  80  * in containers so that our children inherit that. */
  81 #define DEFAULT_RLIMIT_MEMLOCK (1024ULL*1024ULL*8ULL)
  82
  83 /* Path where PID1 listens for varlink subscriptions from systemd-oomd to notify of changes in ManagedOOM settings. */
  84 #define VARLINK_ADDR_PATH_MANAGED_OOM_SYSTEM "/run/systemd/io.systemd.ManagedOOM"
  85 /* Path where systemd-oomd listens for varlink connections from user managers to report changes in ManagedOOM settings. */
  86 #define VARLINK_ADDR_PATH_MANAGED_OOM_USER "/run/systemd/oom/io.systemd.ManagedOOM"
  87
  88 #define KERNEL_BASELINE_VERSION "4.15"