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qapi event: convert BALLOON_CHANGE 

Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Wenchao Xia 2014-06-18 08:43:51 +02:00 committed by Luiz Capitulino
parent 5f41fbba90
commit aef9d3115f
6 changed files with 18 additions and 36 deletions
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13
balloon.c
View File

@ -81,19 +81,6 @@ static int qemu_balloon_status(BalloonInfo *info)
return 1; return 1;
} }
void qemu_balloon_changed(int64_t actual)
{
QObject *data;
data = qobject_from_jsonf("{ 'actual': %" PRId64 " }",
actual);
monitor_protocol_event(QEVENT_BALLOON_CHANGE, data);
qobject_decref(data);
}
BalloonInfo *qmp_query_balloon(Error **errp) BalloonInfo *qmp_query_balloon(Error **errp)
{ {
BalloonInfo *info; BalloonInfo *info;

17
docs/qmp/qmp-events.txt
View File

@ -1,23 +1,6 @@
QEMU Machine Protocol Events QEMU Machine Protocol Events
============================ ============================
BALLOON_CHANGE
--------------
Emitted when the guest changes the actual BALLOON level. This
value is equivalent to the 'actual' field return by the
'query-balloon' command
Data:
- "actual": actual level of the guest memory balloon in bytes (json-number)
Example:
{ "event": "BALLOON_CHANGE",
"data": { "actual": 944766976 },
"timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
GUEST_PANICKED GUEST_PANICKED
-------------- --------------

6
hw/virtio/virtio-balloon.c
View File

@ -24,6 +24,7 @@
#include "sysemu/kvm.h" #include "sysemu/kvm.h"
#include "exec/address-spaces.h" #include "exec/address-spaces.h"
#include "qapi/visitor.h" #include "qapi/visitor.h"
#include "qapi-event.h"
#if defined(__linux__) #if defined(__linux__)
#include <sys/mman.h> #include <sys/mman.h>
@ -289,8 +290,9 @@ static void virtio_balloon_set_config(VirtIODevice *vdev,
memcpy(&config, config_data, sizeof(struct virtio_balloon_config)); memcpy(&config, config_data, sizeof(struct virtio_balloon_config));
dev->actual = le32_to_cpu(config.actual); dev->actual = le32_to_cpu(config.actual);
if (dev->actual != oldactual) { if (dev->actual != oldactual) {
qemu_balloon_changed(ram_size - qapi_event_send_balloon_change(ram_size -
((ram_addr_t) dev->actual << VIRTIO_BALLOON_PFN_SHIFT)); ((ram_addr_t) dev->actual << VIRTIO_BALLOON_PFN_SHIFT),
&error_abort);
} }
} }

2
include/sysemu/balloon.h
View File

@ -24,6 +24,4 @@ int qemu_add_balloon_handler(QEMUBalloonEvent *event_func,
QEMUBalloonStatus *stat_func, void *opaque); QEMUBalloonStatus *stat_func, void *opaque);
void qemu_remove_balloon_handler(void *opaque); void qemu_remove_balloon_handler(void *opaque);
void qemu_balloon_changed(int64_t actual);
#endif #endif

3
monitor.c
View File

@ -616,6 +616,7 @@ static void monitor_qapi_event_init(void)
/* Limit guest-triggerable events to 1 per second */ /* Limit guest-triggerable events to 1 per second */
monitor_qapi_event_throttle(QAPI_EVENT_RTC_CHANGE, 1000); monitor_qapi_event_throttle(QAPI_EVENT_RTC_CHANGE, 1000);
monitor_qapi_event_throttle(QAPI_EVENT_WATCHDOG, 1000); monitor_qapi_event_throttle(QAPI_EVENT_WATCHDOG, 1000);
monitor_qapi_event_throttle(QAPI_EVENT_BALLOON_CHANGE, 1000);
qmp_event_set_func_emit(monitor_qapi_event_queue); qmp_event_set_func_emit(monitor_qapi_event_queue);
} }
@ -742,8 +743,6 @@ monitor_protocol_event_throttle(MonitorEvent event,
* and initialize state */ * and initialize state */
static void monitor_protocol_event_init(void) static void monitor_protocol_event_init(void)
{ {
/* Limit RTC & BALLOON events to 1 per second */
monitor_protocol_event_throttle(QEVENT_BALLOON_CHANGE, 1000);
/* limit the rate of quorum events to avoid hammering the management */ /* limit the rate of quorum events to avoid hammering the management */
monitor_protocol_event_throttle(QEVENT_QUORUM_REPORT_BAD, 1000); monitor_protocol_event_throttle(QEVENT_QUORUM_REPORT_BAD, 1000);
monitor_protocol_event_throttle(QEVENT_QUORUM_FAILURE, 1000); monitor_protocol_event_throttle(QEVENT_QUORUM_FAILURE, 1000);

13
qapi-event.json
View File

@ -253,3 +253,16 @@
## ##
{ 'event': 'ACPI_DEVICE_OST', { 'event': 'ACPI_DEVICE_OST',
'data': { 'info': 'ACPIOSTInfo' } } 'data': { 'info': 'ACPIOSTInfo' } }
##
# @BALLOON_CHANGE
#
# Emitted when the guest changes the actual BALLOON level. This value is
# equivalent to the @actual field return by the 'query-balloon' command
#
# @actual: actual level of the guest memory balloon in bytes
#
# Since: 1.2
##
{ 'event': 'BALLOON_CHANGE',
'data': { 'actual': 'int' } }