mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-25 12:40:08 +00:00
973603a813
After setting a balloon target value, applications have to
continually poll 'query-balloon' to determine whether the
guest has reacted to this request. The virtio-balloon backend
knows exactly when the guest has reacted though, and thus it
is possible to emit a JSON event to tell the mgmt application
whenever the guest balloon changes.
This introduces a new 'qemu_balloon_changed()' API which is
to be called by balloon driver backends, whenever they have
a change in balloon value. This takes the 'actual' balloon
value, as would be found in the BalloonInfo struct.
The qemu_balloon_change API emits a JSON monitor event which
looks like:
{"timestamp": {"seconds": 1337162462, "microseconds": 814521},
"event": "BALLOON_CHANGE", "data": {"actual": 944766976}}
* balloon.c, balloon.h: Introduce qemu_balloon_changed() for
emitting balloon change events on the monitor
* hw/virtio-balloon.c: Invoke qemu_balloon_changed() whenever
the guest changes the balloon actual value
* monitor.c, monitor.h: Define QEVENT_BALLOON_CHANGE
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Acked-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
#ifndef MONITOR_H
|
|
#define MONITOR_H
|
|
|
|
#include "qemu-common.h"
|
|
#include "qemu-char.h"
|
|
#include "qerror.h"
|
|
#include "qdict.h"
|
|
#include "block.h"
|
|
#include "readline.h"
|
|
|
|
extern Monitor *cur_mon;
|
|
extern Monitor *default_mon;
|
|
|
|
/* flags for monitor_init */
|
|
#define MONITOR_IS_DEFAULT 0x01
|
|
#define MONITOR_USE_READLINE 0x02
|
|
#define MONITOR_USE_CONTROL 0x04
|
|
#define MONITOR_USE_PRETTY 0x08
|
|
|
|
/* flags for monitor commands */
|
|
#define MONITOR_CMD_ASYNC 0x0001
|
|
|
|
/* QMP events */
|
|
typedef enum MonitorEvent {
|
|
QEVENT_SHUTDOWN,
|
|
QEVENT_RESET,
|
|
QEVENT_POWERDOWN,
|
|
QEVENT_STOP,
|
|
QEVENT_RESUME,
|
|
QEVENT_VNC_CONNECTED,
|
|
QEVENT_VNC_INITIALIZED,
|
|
QEVENT_VNC_DISCONNECTED,
|
|
QEVENT_BLOCK_IO_ERROR,
|
|
QEVENT_RTC_CHANGE,
|
|
QEVENT_WATCHDOG,
|
|
QEVENT_SPICE_CONNECTED,
|
|
QEVENT_SPICE_INITIALIZED,
|
|
QEVENT_SPICE_DISCONNECTED,
|
|
QEVENT_BLOCK_JOB_COMPLETED,
|
|
QEVENT_BLOCK_JOB_CANCELLED,
|
|
QEVENT_DEVICE_TRAY_MOVED,
|
|
QEVENT_SUSPEND,
|
|
QEVENT_WAKEUP,
|
|
QEVENT_BALLOON_CHANGE,
|
|
|
|
/* Add to 'monitor_event_names' array in monitor.c when
|
|
* defining new events here */
|
|
|
|
QEVENT_MAX,
|
|
} MonitorEvent;
|
|
|
|
int monitor_cur_is_qmp(void);
|
|
|
|
void monitor_protocol_event(MonitorEvent event, QObject *data);
|
|
void monitor_init(CharDriverState *chr, int flags);
|
|
|
|
int monitor_suspend(Monitor *mon);
|
|
void monitor_resume(Monitor *mon);
|
|
|
|
int monitor_read_bdrv_key_start(Monitor *mon, BlockDriverState *bs,
|
|
BlockDriverCompletionFunc *completion_cb,
|
|
void *opaque);
|
|
int monitor_read_block_device_key(Monitor *mon, const char *device,
|
|
BlockDriverCompletionFunc *completion_cb,
|
|
void *opaque);
|
|
|
|
int monitor_get_fd(Monitor *mon, const char *fdname);
|
|
|
|
void monitor_vprintf(Monitor *mon, const char *fmt, va_list ap)
|
|
GCC_FMT_ATTR(2, 0);
|
|
void monitor_printf(Monitor *mon, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
|
|
void monitor_print_filename(Monitor *mon, const char *filename);
|
|
void monitor_flush(Monitor *mon);
|
|
int monitor_set_cpu(int cpu_index);
|
|
int monitor_get_cpu_index(void);
|
|
|
|
typedef void (MonitorCompletion)(void *opaque, QObject *ret_data);
|
|
|
|
void monitor_set_error(Monitor *mon, QError *qerror);
|
|
void monitor_read_command(Monitor *mon, int show_prompt);
|
|
ReadLineState *monitor_get_rs(Monitor *mon);
|
|
int monitor_read_password(Monitor *mon, ReadLineFunc *readline_func,
|
|
void *opaque);
|
|
|
|
int qmp_qom_set(Monitor *mon, const QDict *qdict, QObject **ret);
|
|
|
|
int qmp_qom_get(Monitor *mon, const QDict *qdict, QObject **ret);
|
|
|
|
#endif /* !MONITOR_H */
|