22afb46e7c
Instead of invoking select_watchdog_action from both HMP and command line, go directly from HMP to QMP and use QemuOpts as the intermediary for the command line. This makes -watchdog-action explicitly a shortcut for "-action watchdog", so that "-watchdog-action" and "-action watchdog" override each other based on the position on the command line; previously, "-action watchdog" always won. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
/*
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* Virtual hardware watchdog.
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*
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* Copyright (C) 2009 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* By Richard W.M. Jones (rjones@redhat.com).
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*/
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#include "qemu/osdep.h"
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#include "qemu/option.h"
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#include "qemu/config-file.h"
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#include "qemu/queue.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-run-state.h"
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#include "qapi/qapi-events-run-state.h"
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#include "sysemu/runstate.h"
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#include "sysemu/watchdog.h"
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#include "hw/nmi.h"
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#include "qemu/help_option.h"
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static WatchdogAction watchdog_action = WATCHDOG_ACTION_RESET;
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static QLIST_HEAD(, WatchdogTimerModel) watchdog_list;
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void watchdog_add_model(WatchdogTimerModel *model)
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{
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QLIST_INSERT_HEAD(&watchdog_list, model, entry);
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}
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/* Returns:
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* 0 = continue
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* 1 = exit program with error
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* 2 = exit program without error
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*/
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int select_watchdog(const char *p)
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{
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WatchdogTimerModel *model;
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QemuOpts *opts;
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/* -watchdog ? lists available devices and exits cleanly. */
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if (is_help_option(p)) {
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QLIST_FOREACH(model, &watchdog_list, entry) {
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fprintf(stderr, "\t%s\t%s\n",
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model->wdt_name, model->wdt_description);
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}
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return 2;
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}
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QLIST_FOREACH(model, &watchdog_list, entry) {
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if (strcasecmp(model->wdt_name, p) == 0) {
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/* add the device */
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opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
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&error_abort);
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qemu_opt_set(opts, "driver", p, &error_abort);
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return 0;
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}
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}
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fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
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QLIST_FOREACH(model, &watchdog_list, entry) {
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fprintf(stderr, "\t%s\t%s\n",
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model->wdt_name, model->wdt_description);
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}
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return 1;
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}
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WatchdogAction get_watchdog_action(void)
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{
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return watchdog_action;
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}
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/* This actually performs the "action" once a watchdog has expired,
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* ie. reboot, shutdown, exit, etc.
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*/
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void watchdog_perform_action(void)
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{
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switch (watchdog_action) {
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case WATCHDOG_ACTION_RESET: /* same as 'system_reset' in monitor */
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qapi_event_send_watchdog(WATCHDOG_ACTION_RESET);
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qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
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break;
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case WATCHDOG_ACTION_SHUTDOWN: /* same as 'system_powerdown' in monitor */
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qapi_event_send_watchdog(WATCHDOG_ACTION_SHUTDOWN);
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qemu_system_powerdown_request();
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break;
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case WATCHDOG_ACTION_POWEROFF: /* same as 'quit' command in monitor */
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qapi_event_send_watchdog(WATCHDOG_ACTION_POWEROFF);
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exit(0);
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case WATCHDOG_ACTION_PAUSE: /* same as 'stop' command in monitor */
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/* In a timer callback, when vm_stop calls qemu_clock_enable
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* you would get a deadlock. Bypass the problem.
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*/
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qemu_system_vmstop_request_prepare();
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qapi_event_send_watchdog(WATCHDOG_ACTION_PAUSE);
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qemu_system_vmstop_request(RUN_STATE_WATCHDOG);
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break;
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case WATCHDOG_ACTION_DEBUG:
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qapi_event_send_watchdog(WATCHDOG_ACTION_DEBUG);
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fprintf(stderr, "watchdog: timer fired\n");
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break;
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case WATCHDOG_ACTION_NONE:
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qapi_event_send_watchdog(WATCHDOG_ACTION_NONE);
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break;
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case WATCHDOG_ACTION_INJECT_NMI:
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qapi_event_send_watchdog(WATCHDOG_ACTION_INJECT_NMI);
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nmi_monitor_handle(0, NULL);
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break;
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default:
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assert(0);
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}
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}
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void qmp_watchdog_set_action(WatchdogAction action, Error **errp)
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{
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watchdog_action = action;
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}
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