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1.1 root 1: /*
2: * Virtual hardware watchdog.
3: *
4: * Copyright (C) 2009 Red Hat Inc.
5: *
6: * This program is free software; you can redistribute it and/or
7: * modify it under the terms of the GNU General Public License
8: * as published by the Free Software Foundation; either version 2
9: * of the License, or (at your option) any later version.
10: *
11: * This program is distributed in the hope that it will be useful,
12: * but WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: * GNU General Public License for more details.
15: *
16: * You should have received a copy of the GNU General Public License
17: * along with this program; if not, see <http://www.gnu.org/licenses/>.
18: *
19: * By Richard W.M. Jones ([email protected]).
20: */
21:
22: #include "qemu-common.h"
1.1.1.2 root 23: #include "qemu-option.h"
24: #include "qemu-config.h"
25: #include "qemu-queue.h"
1.1.1.3 ! root 26: #include "qemu-objects.h"
! 27: #include "monitor.h"
1.1 root 28: #include "sysemu.h"
29: #include "hw/watchdog.h"
30:
1.1.1.2 root 31: /* Possible values for action parameter. */
32: #define WDT_RESET 1 /* Hard reset. */
33: #define WDT_SHUTDOWN 2 /* Shutdown. */
34: #define WDT_POWEROFF 3 /* Quit. */
35: #define WDT_PAUSE 4 /* Pause. */
36: #define WDT_DEBUG 5 /* Prints a message and continues running. */
37: #define WDT_NONE 6 /* Do nothing. */
38:
39: static int watchdog_action = WDT_RESET;
40: static QLIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list;
1.1 root 41:
42: void watchdog_add_model(WatchdogTimerModel *model)
43: {
1.1.1.2 root 44: QLIST_INSERT_HEAD(&watchdog_list, model, entry);
1.1 root 45: }
46:
47: /* Returns:
48: * 0 = continue
49: * 1 = exit program with error
50: * 2 = exit program without error
51: */
52: int select_watchdog(const char *p)
53: {
54: WatchdogTimerModel *model;
1.1.1.2 root 55: QemuOpts *opts;
1.1 root 56:
57: /* -watchdog ? lists available devices and exits cleanly. */
58: if (strcmp(p, "?") == 0) {
1.1.1.2 root 59: QLIST_FOREACH(model, &watchdog_list, entry) {
1.1 root 60: fprintf(stderr, "\t%s\t%s\n",
61: model->wdt_name, model->wdt_description);
62: }
63: return 2;
64: }
65:
1.1.1.2 root 66: QLIST_FOREACH(model, &watchdog_list, entry) {
1.1 root 67: if (strcasecmp(model->wdt_name, p) == 0) {
1.1.1.2 root 68: /* add the device */
69: opts = qemu_opts_create(&qemu_device_opts, NULL, 0);
70: qemu_opt_set(opts, "driver", p);
1.1 root 71: return 0;
72: }
73: }
74:
75: fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
1.1.1.2 root 76: QLIST_FOREACH(model, &watchdog_list, entry) {
1.1 root 77: fprintf(stderr, "\t%s\t%s\n",
78: model->wdt_name, model->wdt_description);
79: }
80: return 1;
81: }
82:
83: int select_watchdog_action(const char *p)
84: {
85: if (strcasecmp(p, "reset") == 0)
86: watchdog_action = WDT_RESET;
87: else if (strcasecmp(p, "shutdown") == 0)
88: watchdog_action = WDT_SHUTDOWN;
89: else if (strcasecmp(p, "poweroff") == 0)
90: watchdog_action = WDT_POWEROFF;
91: else if (strcasecmp(p, "pause") == 0)
92: watchdog_action = WDT_PAUSE;
93: else if (strcasecmp(p, "debug") == 0)
94: watchdog_action = WDT_DEBUG;
95: else if (strcasecmp(p, "none") == 0)
96: watchdog_action = WDT_NONE;
97: else
98: return -1;
99:
100: return 0;
101: }
102:
1.1.1.3 ! root 103: static void watchdog_mon_event(const char *action)
! 104: {
! 105: QObject *data;
! 106:
! 107: data = qobject_from_jsonf("{ 'action': %s }", action);
! 108: monitor_protocol_event(QEVENT_WATCHDOG, data);
! 109: qobject_decref(data);
! 110: }
! 111:
1.1 root 112: /* This actually performs the "action" once a watchdog has expired,
113: * ie. reboot, shutdown, exit, etc.
114: */
115: void watchdog_perform_action(void)
116: {
117: switch(watchdog_action) {
118: case WDT_RESET: /* same as 'system_reset' in monitor */
1.1.1.3 ! root 119: watchdog_mon_event("reset");
1.1 root 120: qemu_system_reset_request();
121: break;
122:
123: case WDT_SHUTDOWN: /* same as 'system_powerdown' in monitor */
1.1.1.3 ! root 124: watchdog_mon_event("shutdown");
1.1 root 125: qemu_system_powerdown_request();
126: break;
127:
128: case WDT_POWEROFF: /* same as 'quit' command in monitor */
1.1.1.3 ! root 129: watchdog_mon_event("poweroff");
1.1 root 130: exit(0);
131: break;
132:
133: case WDT_PAUSE: /* same as 'stop' command in monitor */
1.1.1.3 ! root 134: watchdog_mon_event("pause");
1.1 root 135: vm_stop(0);
136: break;
137:
138: case WDT_DEBUG:
1.1.1.3 ! root 139: watchdog_mon_event("debug");
1.1 root 140: fprintf(stderr, "watchdog: timer fired\n");
141: break;
142:
143: case WDT_NONE:
1.1.1.3 ! root 144: watchdog_mon_event("none");
1.1 root 145: break;
146: }
147: }
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