253 lines
9.5 KiB
C
253 lines
9.5 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#include <unistd.h>
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#include "ansi-color.h"
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#include "emergency-action.h"
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#include "manager.h"
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#include "reboot-util.h"
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#include "special.h"
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#include "string-table.h"
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#include "string-util.h"
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#include "virt.h"
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static const char* const emergency_action_table[_EMERGENCY_ACTION_MAX] = {
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[EMERGENCY_ACTION_NONE] = "none",
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[EMERGENCY_ACTION_EXIT] = "exit",
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[EMERGENCY_ACTION_EXIT_FORCE] = "exit-force",
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[EMERGENCY_ACTION_REBOOT] = "reboot",
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[EMERGENCY_ACTION_REBOOT_FORCE] = "reboot-force",
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[EMERGENCY_ACTION_REBOOT_IMMEDIATE] = "reboot-immediate",
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[EMERGENCY_ACTION_POWEROFF] = "poweroff",
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[EMERGENCY_ACTION_POWEROFF_FORCE] = "poweroff-force",
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[EMERGENCY_ACTION_POWEROFF_IMMEDIATE] = "poweroff-immediate",
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[EMERGENCY_ACTION_SOFT_REBOOT] = "soft-reboot",
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[EMERGENCY_ACTION_SOFT_REBOOT_FORCE] = "soft-reboot-force",
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[EMERGENCY_ACTION_KEXEC] = "kexec",
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[EMERGENCY_ACTION_KEXEC_FORCE] = "kexec-force",
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[EMERGENCY_ACTION_HALT] = "halt",
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[EMERGENCY_ACTION_HALT_FORCE] = "halt-force",
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[EMERGENCY_ACTION_HALT_IMMEDIATE] = "halt-immediate",
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};
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static void log_and_status(
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Manager *m,
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EmergencyAction action,
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EmergencyActionFlags flags,
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const char *message,
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const char *reason) {
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assert(m);
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assert(message);
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assert(reason);
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log_full(FLAGS_SET(flags, EMERGENCY_ACTION_WARN) ? LOG_WARNING : LOG_DEBUG,
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"%s: %s", message, reason);
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bool do_sleep = FLAGS_SET(flags, EMERGENCY_ACTION_WARN|EMERGENCY_ACTION_SLEEP_5S) &&
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IN_SET(action,
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EMERGENCY_ACTION_EXIT_FORCE,
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EMERGENCY_ACTION_REBOOT_FORCE, EMERGENCY_ACTION_REBOOT_IMMEDIATE,
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EMERGENCY_ACTION_POWEROFF_FORCE, EMERGENCY_ACTION_POWEROFF_IMMEDIATE,
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EMERGENCY_ACTION_SOFT_REBOOT_FORCE,
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EMERGENCY_ACTION_KEXEC_FORCE);
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if (FLAGS_SET(flags, EMERGENCY_ACTION_WARN))
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manager_status_printf(
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m,
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STATUS_TYPE_EMERGENCY,
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ANSI_HIGHLIGHT_RED " !! " ANSI_NORMAL,
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"%s: %s%s", message, reason,
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do_sleep ? ", proceeding in 5s" : "");
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/* Optionally sleep for 5s so that the user can see this output, before we actually execute the
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* operation. Do this only if we immediately execute an operation, i.e. when there's no event loop to
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* feed anymore. */
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if (do_sleep)
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(void) sleep(5);
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}
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void emergency_action(
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Manager *m,
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EmergencyAction action,
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EmergencyActionFlags flags,
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const char *reboot_arg,
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int exit_status,
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const char *reason) {
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Unit *u;
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assert(m);
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assert(action >= 0);
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assert(action < _EMERGENCY_ACTION_MAX);
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assert((flags & ~_EMERGENCY_ACTION_FLAGS_MAX) == 0);
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assert(reason);
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if (action == EMERGENCY_ACTION_NONE)
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return;
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/* Is the special shutdown target active or queued? If so, we are in shutdown state */
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if (IN_SET(action,
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EMERGENCY_ACTION_REBOOT,
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EMERGENCY_ACTION_SOFT_REBOOT,
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EMERGENCY_ACTION_POWEROFF,
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EMERGENCY_ACTION_EXIT,
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EMERGENCY_ACTION_KEXEC,
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EMERGENCY_ACTION_HALT)) {
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u = manager_get_unit(m, SPECIAL_SHUTDOWN_TARGET);
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if (u && unit_active_or_pending(u)) {
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log_notice("Shutdown is already active. Skipping emergency action request %s.",
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emergency_action_table[action]);
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return;
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}
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}
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if (FLAGS_SET(flags, EMERGENCY_ACTION_IS_WATCHDOG) && !m->service_watchdogs) {
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log_warning("Watchdog disabled! Not acting on: %s", reason);
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return;
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}
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switch (action) {
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case EMERGENCY_ACTION_REBOOT:
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log_and_status(m, action, flags, "Rebooting", reason);
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(void) update_reboot_parameter_and_warn(reboot_arg, true);
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(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
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break;
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case EMERGENCY_ACTION_REBOOT_FORCE:
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log_and_status(m, action, flags, "Forcibly rebooting", reason);
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(void) update_reboot_parameter_and_warn(reboot_arg, true);
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m->objective = MANAGER_REBOOT;
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break;
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case EMERGENCY_ACTION_REBOOT_IMMEDIATE:
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log_and_status(m, action, flags, "Rebooting immediately", reason);
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sync();
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if (!isempty(reboot_arg)) {
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log_info("Rebooting with argument '%s'.", reboot_arg);
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(void) raw_reboot(LINUX_REBOOT_CMD_RESTART2, reboot_arg);
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log_warning_errno(errno, "Failed to reboot with parameter, retrying without: %m");
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}
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log_info("Rebooting.");
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(void) reboot(RB_AUTOBOOT);
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break;
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case EMERGENCY_ACTION_SOFT_REBOOT:
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log_and_status(m, action, flags, "Soft-rebooting", reason);
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(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_SOFT_REBOOT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
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break;
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case EMERGENCY_ACTION_SOFT_REBOOT_FORCE:
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log_and_status(m, action, flags, "Forcibly soft-rebooting", reason);
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m->objective = MANAGER_SOFT_REBOOT;
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break;
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case EMERGENCY_ACTION_EXIT:
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if (exit_status >= 0)
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m->return_value = exit_status;
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if (MANAGER_IS_USER(m) || detect_container() > 0) {
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log_and_status(m, action, flags, "Exiting", reason);
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(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_EXIT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
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break;
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}
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log_notice("Doing \"poweroff\" action instead of an \"exit\" emergency action.");
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_fallthrough_;
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case EMERGENCY_ACTION_POWEROFF:
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log_and_status(m, action, flags, "Powering off", reason);
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(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_POWEROFF_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
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break;
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case EMERGENCY_ACTION_EXIT_FORCE:
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if (exit_status >= 0)
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m->return_value = exit_status;
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if (MANAGER_IS_USER(m) || detect_container() > 0) {
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log_and_status(m, action, flags, "Exiting immediately", reason);
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m->objective = MANAGER_EXIT;
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break;
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}
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log_notice("Doing \"poweroff-force\" action instead of an \"exit-force\" emergency action.");
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_fallthrough_;
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case EMERGENCY_ACTION_POWEROFF_FORCE:
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log_and_status(m, action, flags, "Forcibly powering off", reason);
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m->objective = MANAGER_POWEROFF;
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break;
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case EMERGENCY_ACTION_POWEROFF_IMMEDIATE:
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log_and_status(m, action, flags, "Powering off immediately", reason);
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sync();
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log_info("Powering off.");
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(void) reboot(RB_POWER_OFF);
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break;
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case EMERGENCY_ACTION_KEXEC:
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log_and_status(m, action, flags, "Executing kexec", reason);
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(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_KEXEC_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
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break;
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case EMERGENCY_ACTION_KEXEC_FORCE:
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log_and_status(m, action, flags, "Forcibly executing kexec", reason);
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m->objective = MANAGER_KEXEC;
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break;
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case EMERGENCY_ACTION_HALT:
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log_and_status(m, action, flags, "Halting", reason);
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(void) manager_add_job_by_name_and_warn(m, JOB_START, SPECIAL_HALT_TARGET, JOB_REPLACE_IRREVERSIBLY, NULL, NULL);
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break;
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case EMERGENCY_ACTION_HALT_FORCE:
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log_and_status(m, action, flags, "Forcibly halting", reason);
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m->objective = MANAGER_HALT;
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break;
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case EMERGENCY_ACTION_HALT_IMMEDIATE:
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log_and_status(m, action, flags, "Halting immediately", reason);
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sync();
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log_info("Halting.");
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(void) reboot(RB_HALT_SYSTEM);
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break;
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default:
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assert_not_reached();
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}
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}
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DEFINE_STRING_TABLE_LOOKUP(emergency_action, EmergencyAction);
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int parse_emergency_action(
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const char *value,
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RuntimeScope runtime_scope,
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EmergencyAction *ret) {
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EmergencyAction x;
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x = emergency_action_from_string(value);
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if (x < 0)
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return -EINVAL;
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if (runtime_scope != RUNTIME_SCOPE_SYSTEM && x > _EMERGENCY_ACTION_LAST_USER_ACTION)
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return -EOPNOTSUPP;
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*ret = x;
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return 0;
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}
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