1dfb4dd993
Today, when notifying a VM state change with vm_state_notify(), we pass a VMSTOP macro as the 'reason' argument. This is not ideal because the VMSTOP macros tell why qemu stopped and not exactly what the current VM state is. One example to demonstrate this problem is that vm_start() calls vm_state_notify() with reason=0, which turns out to be VMSTOP_USER. This commit fixes that by replacing the VMSTOP macros with a proper state type called RunState. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
148 lines
4.2 KiB
C
148 lines
4.2 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-common.h"
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#include "qemu-option.h"
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#include "qemu-config.h"
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#include "qemu-queue.h"
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#include "qemu-objects.h"
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#include "monitor.h"
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#include "sysemu.h"
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#include "hw/watchdog.h"
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/* Possible values for action parameter. */
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#define WDT_RESET 1 /* Hard reset. */
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#define WDT_SHUTDOWN 2 /* Shutdown. */
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#define WDT_POWEROFF 3 /* Quit. */
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#define WDT_PAUSE 4 /* Pause. */
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#define WDT_DEBUG 5 /* Prints a message and continues running. */
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#define WDT_NONE 6 /* Do nothing. */
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static int watchdog_action = WDT_RESET;
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static QLIST_HEAD(watchdog_list, 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 (strcmp(p, "?") == 0) {
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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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qemu_opt_set(opts, "driver", p);
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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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if (strcasecmp(p, "reset") == 0)
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watchdog_action = WDT_RESET;
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else if (strcasecmp(p, "shutdown") == 0)
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watchdog_action = WDT_SHUTDOWN;
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else if (strcasecmp(p, "poweroff") == 0)
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watchdog_action = WDT_POWEROFF;
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else if (strcasecmp(p, "pause") == 0)
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watchdog_action = WDT_PAUSE;
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else if (strcasecmp(p, "debug") == 0)
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watchdog_action = WDT_DEBUG;
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else if (strcasecmp(p, "none") == 0)
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watchdog_action = WDT_NONE;
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else
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return -1;
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return 0;
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}
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static void watchdog_mon_event(const char *action)
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{
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QObject *data;
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data = qobject_from_jsonf("{ 'action': %s }", action);
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monitor_protocol_event(QEVENT_WATCHDOG, data);
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qobject_decref(data);
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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 WDT_RESET: /* same as 'system_reset' in monitor */
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watchdog_mon_event("reset");
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qemu_system_reset_request();
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break;
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case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */
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watchdog_mon_event("shutdown");
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qemu_system_powerdown_request();
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break;
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case WDT_POWEROFF: /* same as 'quit' command in monitor */
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watchdog_mon_event("poweroff");
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exit(0);
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break;
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case WDT_PAUSE: /* same as 'stop' command in monitor */
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watchdog_mon_event("pause");
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vm_stop(RSTATE_WATCHDOG);
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break;
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case WDT_DEBUG:
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watchdog_mon_event("debug");
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fprintf(stderr, "watchdog: timer fired\n");
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break;
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case WDT_NONE:
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watchdog_mon_event("none");
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break;
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}
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}
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