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Define public API for receiving guest memory balloon events

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When the guest changes its memory balloon applications may want
to know what the new value is, without having to periodically
poll on XML / domain info. Introduce a "balloon change" event
to let apps see this

* include/libvirt/libvirt.h.in: Define the
  virConnectDomainEventBalloonChangeCallback callback
  and VIR_DOMAIN_EVENT_ID_BALLOON_CHANGE constant
* python/libvirt-override-virConnect.py,
  python/libvirt-override.c: Wire up helpers for new event
* daemon/remote.c: Helper for serializing balloon event
* examples/domain-events/events-c/event-test.c,
  examples/domain-events/events-python/event-test.py: Add
  example of balloon event usage
* src/conf/domain_event.c, src/conf/domain_event.h: Handling
  of balloon events
* src/remote/remote_driver.c: Add handler of balloon events
* src/remote/remote_protocol.x: Define wire protocol for
  balloon events
* src/remote_protocol-structs: Likewise.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange
2012-07-13 17:05:17 +08:00
committed by Guannan Ren
parent db4eba91a7
commit 7ed6d7dda7
12 changed files with 211 additions and 2 deletions
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17
include/libvirt/libvirt.h.in
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@@ -3861,6 +3861,22 @@ typedef void (*virConnectDomainEventPMSuspendCallback)(virConnectPtr conn,
int reason,
void *opaque);
/**
* virConnectDomainEventBalloonChangeCallback:
* @conn: connection object
* @dom: domain on which the event occurred
* @actual: the new balloon level measured in kibibytes(blocks of 1024 bytes)
* @opaque: application specified data
*
* The callback signature to use when registering for an event of type
* VIR_DOMAIN_EVENT_ID_BALLOON_CHANGE with virConnectDomainEventRegisterAny()
*/
typedef void (*virConnectDomainEventBalloonChangeCallback)(virConnectPtr conn,
virDomainPtr dom,
unsigned long long actual,
void *opaque);
/**
* VIR_DOMAIN_EVENT_CALLBACK:
*
@@ -3884,6 +3900,7 @@ typedef enum {
VIR_DOMAIN_EVENT_ID_TRAY_CHANGE = 10, /* virConnectDomainEventTrayChangeCallback */
VIR_DOMAIN_EVENT_ID_PMWAKEUP = 11, /* virConnectDomainEventPMWakeupCallback */
VIR_DOMAIN_EVENT_ID_PMSUSPEND = 12, /* virConnectDomainEventPMSuspendCallback */
VIR_DOMAIN_EVENT_ID_BALLOON_CHANGE = 13, /* virConnectDomainEventBalloonChangeCallback */
#ifdef VIR_ENUM_SENTINELS
/*