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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <sys/reboot.h>
#include "bus-error.h"
#include "bus-util.h"
#include "emergency-action.h"
#include "raw-reboot.h"
#include "reboot-util.h"
#include "special.h"
#include "string-table.h"
#include "terminal-util.h"
#include "virt.h"
static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
[EMERGENCY_ACTION_NONE] = "none",
[EMERGENCY_ACTION_REBOOT] = "reboot",
[EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
[EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
[EMERGENCY_ACTION_POWEROFF] = "poweroff",
[EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
[EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate",
[EMERGENCY_ACTION_EXIT] = "exit",
[EMERGENCY_ACTION_EXIT_FORCE] = "exit-force",
};
static void log_and_status(Manager *m, bool warn, const char *message, const char *reason) {
log_full(warn ? LOG_WARNING : LOG_DEBUG, "%s: %s", message, reason);
if (warn)
manager_status_printf(m, STATUS_TYPE_EMERGENCY,
ANSI_HIGHLIGHT_RED " !! " ANSI_NORMAL,
"%s: %s", message, reason);
}
void emergency_action(
Manager *m,
EmergencyAction action,
EmergencyActionFlags options,
const char *reboot_arg,
int exit_status,
const char *reason) {
Unit *u;
assert(m);
assert(action >= 0);
assert(action < _EMERGENCY_ACTION_MAX);
/* Is the special shutdown target active or queued? If so, we are in shutdown state */
if (IN_SET(action, EMERGENCY_ACTION_REBOOT, EMERGENCY_ACTION_POWEROFF, EMERGENCY_ACTION_EXIT)) {
u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
if (u && unit_active_or_pending(u)) {
log_notice("Shutdown is already active. Skipping emergency action request %s.",
emergency_action_table[action]);
return;
}
}
if (action == EMERGENCY_ACTION_NONE)
return;
if (FLAGS_SET(options, EMERGENCY_ACTION_IS_WATCHDOG) && !m->service_watchdogs) {
log_warning("Watchdog disabled! Not acting on: %s", reason);
return;
}
bool warn = FLAGS_SET(options, EMERGENCY_ACTION_WARN);
switch (action) {
case EMERGENCY_ACTION_REBOOT:
log_and_status(m, warn, "Rebooting", reason);
(void) update_reboot_parameter_and_warn(reboot_arg, true);
(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
break;
case EMERGENCY_ACTION_REBOOT_FORCE:
log_and_status(m, warn, "Forcibly rebooting", reason);
(void) update_reboot_parameter_and_warn(reboot_arg, true);
m->objective = MANAGER_REBOOT;
break;
case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
log_and_status(m, warn, "Rebooting immediately", reason);
sync();
if (!isempty(reboot_arg)) {
log_info("Rebooting with argument '%s'.", reboot_arg);
(void) raw_reboot(LINUX_REBOOT_CMD_RESTART2, reboot_arg);
log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
}
log_info("Rebooting.");
(void) reboot(RB_AUTOBOOT);
break;
case EMERGENCY_ACTION_EXIT:
if (exit_status >= 0)
m->return_value = exit_status;
if (MANAGER_IS_USER(m) || detect_container() > 0) {
log_and_status(m, warn, "Exiting", reason);
(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_EXIT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
break;
}
log_notice("Doing \"poweroff\" action instead of an \"exit\" emergency action.");
_fallthrough_;
case EMERGENCY_ACTION_POWEROFF:
log_and_status(m, warn, "Powering off", reason);
(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
break;
case EMERGENCY_ACTION_EXIT_FORCE:
if (exit_status >= 0)
m->return_value = exit_status;
if (MANAGER_IS_USER(m) || detect_container() > 0) {
log_and_status(m, warn, "Exiting immediately", reason);
m->objective = MANAGER_EXIT;
break;
}
log_notice("Doing \"poweroff-force\" action instead of an \"exit-force\" emergency action.");
_fallthrough_;
case EMERGENCY_ACTION_POWEROFF_FORCE:
log_and_status(m, warn, "Forcibly powering off", reason);
m->objective = MANAGER_POWEROFF;
break;
case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
log_and_status(m, warn, "Powering off immediately", reason);
sync();
log_info("Powering off.");
(void) reboot(RB_POWER_OFF);
break;
default:
assert_not_reached();
}
}
DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);
int parse_emergency_action(
const char *value,
bool system,
EmergencyAction *ret) {
EmergencyAction x;
x = emergency_action_from_string(value);
if (x < 0)
return -EINVAL;
if (!system && x != EMERGENCY_ACTION_NONE && x < _EMERGENCY_ACTION_FIRST_USER_ACTION)
return -EOPNOTSUPP;
*ret = x;
return 0;
}
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