2 * Global State configuration
4 * Copyright (c) 2014-2017 Red Hat Inc
7 * Juan Quintela <quintela@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
13 #include "qemu/osdep.h"
14 #include "qemu/cutils.h"
15 #include "qemu/error-report.h"
16 #include "qapi/error.h"
17 #include "qapi/util.h"
18 #include "migration.h"
19 #include "migration/global_state.h"
20 #include "migration/vmstate.h"
25 uint8_t runstate
[100];
30 static GlobalState global_state
;
32 int global_state_store(void)
34 if (!runstate_store((char *)global_state
.runstate
,
35 sizeof(global_state
.runstate
))) {
36 error_report("runstate name too big: %s", global_state
.runstate
);
37 trace_migrate_state_too_big();
43 void global_state_store_running(void)
45 const char *state
= RunState_lookup
[RUN_STATE_RUNNING
];
46 strncpy((char *)global_state
.runstate
,
47 state
, sizeof(global_state
.runstate
));
50 bool global_state_received(void)
52 return global_state
.received
;
55 RunState
global_state_get_runstate(void)
57 return global_state
.state
;
60 static bool global_state_needed(void *opaque
)
62 GlobalState
*s
= opaque
;
63 char *runstate
= (char *)s
->runstate
;
65 /* If it is not optional, it is mandatory */
67 if (migrate_get_current()->store_global_state
) {
71 /* If state is running or paused, it is not needed */
73 if (strcmp(runstate
, "running") == 0 ||
74 strcmp(runstate
, "paused") == 0) {
78 /* for any other state it is needed */
82 static int global_state_post_load(void *opaque
, int version_id
)
84 GlobalState
*s
= opaque
;
85 Error
*local_err
= NULL
;
87 char *runstate
= (char *)s
->runstate
;
90 trace_migrate_global_state_post_load(runstate
);
92 r
= qapi_enum_parse(RunState_lookup
, runstate
, -1, &local_err
);
96 error_report_err(local_err
);
105 static void global_state_pre_save(void *opaque
)
107 GlobalState
*s
= opaque
;
109 trace_migrate_global_state_pre_save((char *)s
->runstate
);
110 s
->size
= strlen((char *)s
->runstate
) + 1;
113 static const VMStateDescription vmstate_globalstate
= {
114 .name
= "globalstate",
116 .minimum_version_id
= 1,
117 .post_load
= global_state_post_load
,
118 .pre_save
= global_state_pre_save
,
119 .needed
= global_state_needed
,
120 .fields
= (VMStateField
[]) {
121 VMSTATE_UINT32(size
, GlobalState
),
122 VMSTATE_BUFFER(runstate
, GlobalState
),
123 VMSTATE_END_OF_LIST()
127 void register_global_state(void)
129 /* We would use it independently that we receive it */
130 strcpy((char *)&global_state
.runstate
, "");
131 global_state
.received
= false;
132 vmstate_register(NULL
, 0, &vmstate_globalstate
, &global_state
);