b58deb344d
Most list head structs need not be given a name. In most cases the name is given just in case one is going to use QTAILQ_LAST, QTAILQ_PREV or reverse iteration, but this does not apply to lists of other kinds, and even for QTAILQ in practice this is only rarely needed. In addition, we will soon reimplement those macros completely so that they do not need a name for the head struct. So clean up everything, not giving a name except in the rare case where it is necessary. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
150 lines
4.4 KiB
C
150 lines
4.4 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/sysemu.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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int select_watchdog_action(const char *p)
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{
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int action;
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char *qapi_value;
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qapi_value = g_ascii_strdown(p, -1);
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action = qapi_enum_parse(&WatchdogAction_lookup, qapi_value, -1, NULL);
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g_free(qapi_value);
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if (action < 0)
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return -1;
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qmp_watchdog_set_action(action, &error_abort);
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return 0;
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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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