src/core/emergency-action.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <sys/reboot.h>
   4
   5 #include "bus-error.h"
   6 #include "bus-util.h"
   7 #include "emergency-action.h"
   8 #include "raw-reboot.h"
   9 #include "reboot-util.h"
  10 #include "special.h"
  11 #include "string-table.h"
  12 #include "terminal-util.h"
  13 #include "virt.h"
  14
  15 static void log_and_status(Manager *m, bool warn, const char *message, const char *reason) {
  16         log_full(warn ? LOG_WARNING : LOG_DEBUG, "%s: %s", message, reason);
  17         if (warn)
  18                 manager_status_printf(m, STATUS_TYPE_EMERGENCY,
  19                                       ANSI_HIGHLIGHT_RED "  !!  " ANSI_NORMAL,
  20                                       "%s: %s", message, reason);
  21 }
  22
  23 int emergency_action(
  24                 Manager *m,
  25                 EmergencyAction action,
  26                 EmergencyActionFlags options,
  27                 const char *reboot_arg,
  28                 const char *reason) {
  29
  30         assert(m);
  31         assert(action >= 0);
  32         assert(action < _EMERGENCY_ACTION_MAX);
  33
  34         if (action == EMERGENCY_ACTION_NONE)
  35                 return -ECANCELED;
  36
  37         if (FLAGS_SET(options, EMERGENCY_ACTION_IS_WATCHDOG) && !m->service_watchdogs) {
  38                 log_warning("Watchdog disabled! Not acting on: %s", reason);
  39                 return -ECANCELED;
  40         }
  41
  42         bool warn = FLAGS_SET(options, EMERGENCY_ACTION_WARN);
  43
  44         switch (action) {
  45
  46         case EMERGENCY_ACTION_REBOOT:
  47                 log_and_status(m, warn, "Rebooting", reason);
  48
  49                 (void) update_reboot_parameter_and_warn(reboot_arg);
  50                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  51
  52                 break;
  53
  54         case EMERGENCY_ACTION_REBOOT_FORCE:
  55                 log_and_status(m, warn, "Forcibly rebooting", reason);
  56
  57                 (void) update_reboot_parameter_and_warn(reboot_arg);
  58                 m->objective = MANAGER_REBOOT;
  59
  60                 break;
  61
  62         case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
  63                 log_and_status(m, warn, "Rebooting immediately", reason);
  64
  65                 sync();
  66
  67                 if (!isempty(reboot_arg)) {
  68                         log_info("Rebooting with argument '%s'.", reboot_arg);
  69                         (void) raw_reboot(LINUX_REBOOT_CMD_RESTART2, reboot_arg);
  70                         log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
  71                 }
  72
  73                 log_info("Rebooting.");
  74                 (void) reboot(RB_AUTOBOOT);
  75                 break;
  76
  77         case EMERGENCY_ACTION_EXIT:
  78                 if (MANAGER_IS_USER(m) || detect_container() > 0) {
  79                         log_and_status(m, warn, "Exiting", reason);
  80                         (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_EXIT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  81                         break;
  82                 }
  83
  84                 log_notice("Doing \"poweroff\" action instead of an \"exit\" emergency action.");
  85                 _fallthrough_;
  86
  87         case EMERGENCY_ACTION_POWEROFF:
  88                 log_and_status(m, warn, "Powering off", reason);
  89                 (void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL);
  90                 break;
  91
  92         case EMERGENCY_ACTION_EXIT_FORCE:
  93                 if (MANAGER_IS_USER(m) || detect_container() > 0) {
  94                         log_and_status(m, warn, "Exiting immediately", reason);
  95                         m->objective = MANAGER_EXIT;
  96                         break;
  97                 }
  98
  99                 log_notice("Doing \"poweroff-force\" action instead of an \"exit-force\" emergency action.");
 100                 _fallthrough_;
 101
 102         case EMERGENCY_ACTION_POWEROFF_FORCE:
 103                 log_and_status(m, warn, "Forcibly powering off", reason);
 104                 m->objective = MANAGER_POWEROFF;
 105                 break;
 106
 107         case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
 108                 log_and_status(m, warn, "Powering off immediately", reason);
 109
 110                 sync();
 111
 112                 log_info("Powering off.");
 113                 (void) reboot(RB_POWER_OFF);
 114                 break;
 115
 116         default:
 117                 assert_not_reached("Unknown emergency action");
 118         }
 119
 120         return -ECANCELED;
 121 }
 122
 123 static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
 124         [EMERGENCY_ACTION_NONE] = "none",
 125         [EMERGENCY_ACTION_REBOOT] = "reboot",
 126         [EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
 127         [EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
 128         [EMERGENCY_ACTION_POWEROFF] = "poweroff",
 129         [EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
 130         [EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate",
 131         [EMERGENCY_ACTION_EXIT] = "exit",
 132         [EMERGENCY_ACTION_EXIT_FORCE] = "exit-force",
 133 };
 134 DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);
 135
 136 int parse_emergency_action(
 137                 const char *value,
 138                 bool system,
 139                 EmergencyAction *ret) {
 140
 141         EmergencyAction x;
 142
 143         x = emergency_action_from_string(value);
 144         if (x < 0)
 145                 return -EINVAL;
 146
 147         if (!system && x != EMERGENCY_ACTION_NONE && x < _EMERGENCY_ACTION_FIRST_USER_ACTION)
 148                 return -EOPNOTSUPP;
 149
 150         *ret = x;
 151         return 0;
 152 }