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QMP: query-status: Introduce 'status' key

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This new key reports the current VM status to clients. Please, check
the documentation being added in this commit for more details.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Luiz Capitulino 2011-08-29 16:02:57 -03:00
parent 6667b23f30
commit 9e37b9dc5b
4 changed files with 43 additions and 3 deletions
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3
monitor.c
View file

@ -2636,8 +2636,7 @@ static void do_info_status_print(Monitor *mon, const QObject *data)
static void do_info_status(Monitor *mon, QObject **ret_data)
{
*ret_data = qobject_from_jsonf("{ 'running': %i, 'singlestep': %i }",
runstate_is_running(), singlestep);
*ret_data = qobject_from_jsonf("{ 'running': %i, 'singlestep': %i, 'status': %s }", runstate_is_running(), singlestep, runstate_as_string());
}
static qemu_acl *find_acl(Monitor *mon, const char *name)

19
qmp-commands.hx
View file

@ -1573,11 +1573,28 @@ Return a json-object with the following information:
- "running": true if the VM is running, or false if it is paused (json-bool)
- "singlestep": true if the VM is in single step mode,
false otherwise (json-bool)
- "status": one of the following values (json-string)
"debug" - QEMU is running on a debugger
"inmigrate" - guest is paused waiting for an incoming migration
"internal-error" - An internal error that prevents further guest
execution has occurred
"io-error" - the last IOP has failed and the device is configured
to pause on I/O errors
"paused" - guest has been paused via the 'stop' command
"postmigrate" - guest is paused following a successful 'migrate'
"prelaunch" - QEMU was started with -S and guest has not started
"finish-migrate" - guest is paused to finish the migration process
"restore-vm" - guest is paused to restore VM state
"running" - guest is actively running
"save-vm" - guest is paused to save the VM state
"shutdown" - guest is shut down (and -no-shutdown is in use)
"watchdog" - the watchdog action is configured to pause and
has been triggered
Example:
-> { "execute": "query-status" }
<- { "return": { "running": true, "singlestep": false } }
<- { "return": { "running": true, "singlestep": false, "status": "running" } }
EQMP

1
sysemu.h
View file

@ -39,6 +39,7 @@ void runstate_init(void);
bool runstate_check(RunState state);
void runstate_set(RunState new_state);
int runstate_is_running(void);
const char *runstate_as_string(void);
typedef struct vm_change_state_entry VMChangeStateEntry;
typedef void VMChangeStateHandler(void *opaque, int running, RunState state);

23
vl.c
View file

@ -378,6 +378,22 @@ static const RunStateTransition runstate_transitions_def[] = {
static bool runstate_valid_transitions[RSTATE_MAX][RSTATE_MAX];
static const char *const runstate_name_tbl[RSTATE_MAX] = {
[RSTATE_DEBUG] = "debug",
[RSTATE_IN_MIGRATE] = "incoming-migration",
[RSTATE_PANICKED] = "internal-error",
[RSTATE_IO_ERROR] = "io-error",
[RSTATE_PAUSED] = "paused",
[RSTATE_POST_MIGRATE] = "post-migrate",
[RSTATE_PRE_LAUNCH] = "prelaunch",
[RSTATE_PRE_MIGRATE] = "finish-migrate",
[RSTATE_RESTORE] = "restore-vm",
[RSTATE_RUNNING] = "running",
[RSTATE_SAVEVM] = "save-vm",
[RSTATE_SHUTDOWN] = "shutdown",
[RSTATE_WATCHDOG] = "watchdog",
};
bool runstate_check(RunState state)
{
return current_run_state == state;
@ -406,6 +422,13 @@ void runstate_set(RunState new_state)
current_run_state = new_state;
}
const char *runstate_as_string(void)
{
assert(current_run_state > RSTATE_NO_STATE &&
current_run_state < RSTATE_MAX);
return runstate_name_tbl[current_run_state];
}
int runstate_is_running(void)
{
return runstate_check(RSTATE_RUNNING);