1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
* Virtual hardware watchdog.
*
* Copyright (C) 2009 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
* By Richard W.M. Jones (rjones@redhat.com).
*/
#include "qemu/osdep.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu/queue.h"
#include "qapi/error.h"
#include "sysemu/sysemu.h"
#include "sysemu/watchdog.h"
#include "qapi-event.h"
#include "hw/nmi.h"
#include "qemu/help_option.h"
#include "qmp-commands.h"
static WatchdogAction watchdog_action = WATCHDOG_ACTION_RESET;
static QLIST_HEAD(watchdog_list, WatchdogTimerModel) watchdog_list;
void watchdog_add_model(WatchdogTimerModel *model)
{
QLIST_INSERT_HEAD(&watchdog_list, model, entry);
}
/* Returns:
* 0 = continue
* 1 = exit program with error
* 2 = exit program without error
*/
int select_watchdog(const char *p)
{
WatchdogTimerModel *model;
QemuOpts *opts;
/* -watchdog ? lists available devices and exits cleanly. */
if (is_help_option(p)) {
QLIST_FOREACH(model, &watchdog_list, entry) {
fprintf(stderr, "\t%s\t%s\n",
model->wdt_name, model->wdt_description);
}
return 2;
}
QLIST_FOREACH(model, &watchdog_list, entry) {
if (strcasecmp(model->wdt_name, p) == 0) {
/* add the device */
opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
&error_abort);
qemu_opt_set(opts, "driver", p, &error_abort);
return 0;
}
}
fprintf(stderr, "Unknown -watchdog device. Supported devices are:\n");
QLIST_FOREACH(model, &watchdog_list, entry) {
fprintf(stderr, "\t%s\t%s\n",
model->wdt_name, model->wdt_description);
}
return 1;
}
int select_watchdog_action(const char *p)
{
int action;
char *qapi_value;
qapi_value = g_ascii_strdown(p, -1);
action = qapi_enum_parse(&WatchdogAction_lookup, qapi_value, -1, NULL);
g_free(qapi_value);
if (action < 0)
return -1;
qmp_watchdog_set_action(action, &error_abort);
return 0;
}
WatchdogAction get_watchdog_action(void)
{
return watchdog_action;
}
/* This actually performs the "action" once a watchdog has expired,
* ie. reboot, shutdown, exit, etc.
*/
void watchdog_perform_action(void)
{
switch (watchdog_action) {
case WATCHDOG_ACTION_RESET: /* same as 'system_reset' in monitor */
qapi_event_send_watchdog(WATCHDOG_ACTION_RESET, &error_abort);
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
break;
case WATCHDOG_ACTION_SHUTDOWN: /* same as 'system_powerdown' in monitor */
qapi_event_send_watchdog(WATCHDOG_ACTION_SHUTDOWN, &error_abort);
qemu_system_powerdown_request();
break;
case WATCHDOG_ACTION_POWEROFF: /* same as 'quit' command in monitor */
qapi_event_send_watchdog(WATCHDOG_ACTION_POWEROFF, &error_abort);
exit(0);
case WATCHDOG_ACTION_PAUSE: /* same as 'stop' command in monitor */
/* In a timer callback, when vm_stop calls qemu_clock_enable
* you would get a deadlock. Bypass the problem.
*/
qemu_system_vmstop_request_prepare();
qapi_event_send_watchdog(WATCHDOG_ACTION_PAUSE, &error_abort);
qemu_system_vmstop_request(RUN_STATE_WATCHDOG);
break;
case WATCHDOG_ACTION_DEBUG:
qapi_event_send_watchdog(WATCHDOG_ACTION_DEBUG, &error_abort);
fprintf(stderr, "watchdog: timer fired\n");
break;
case WATCHDOG_ACTION_NONE:
qapi_event_send_watchdog(WATCHDOG_ACTION_NONE, &error_abort);
break;
case WATCHDOG_ACTION_INJECT_NMI:
qapi_event_send_watchdog(WATCHDOG_ACTION_INJECT_NMI,
&error_abort);
nmi_monitor_handle(0, NULL);
break;
default:
assert(0);
}
}
void qmp_watchdog_set_action(WatchdogAction action, Error **errp)
{
watchdog_action = action;
}
|