[libvirt] [PATCH 3/8] parallels: implement functions for domain life cycle management
Daniel P. Berrange
berrange at redhat.com
Fri Jul 27 09:32:06 UTC 2012
On Thu, Jul 26, 2012 at 10:32:02PM +0400, Dmitry Guryanov wrote:
> Add functions for create/shutdown/destroy and suspend/resume domain.
>
> Signed-off-by: Dmitry Guryanov <dguryanov at parallels.com>
> ---
> src/parallels/parallels_driver.c | 143 ++++++++++++++++++++++++++++++++++++++
> src/parallels/parallels_utils.c | 18 +++++
> src/parallels/parallels_utils.h | 2 +
> 3 files changed, 163 insertions(+), 0 deletions(-)
>
> diff --git a/src/parallels/parallels_driver.c b/src/parallels/parallels_driver.c
> index c716b25..8c20d27 100644
> --- a/src/parallels/parallels_driver.c
> +++ b/src/parallels/parallels_driver.c
> @@ -128,6 +128,12 @@ parallelsDomObjFreePrivate(void *p)
> VIR_FREE(p);
> };
>
> +static void
> +parallelsDomainEventQueue(parallelsConnPtr driver, virDomainEventPtr event)
> +{
> + virDomainEventStateQueue(driver->domainEventState, event);
> +}
I don't see any code which ever deals with dispatching of the domain
event state. Is this something you're just preparing now, so that you
can wire up events in a future patch ?
> +
> static virCapsPtr
> parallelsBuildCapabilities(void)
> {
> @@ -805,6 +811,138 @@ parallelsDomainGetAutostart(virDomainPtr domain, int *autostart)
> return ret;
> }
>
> +typedef int (*parallelsChangeStateFunc) (virDomainObjPtr privdom);
> +#define PARALLELS_UUID(x) (((parallelsDomObjPtr)(x->privateData))->uuid)
> +
> +static int
> +parallelsDomainChangeState(virDomainPtr domain,
> + virDomainState req_state, const char *req_state_name,
> + parallelsChangeStateFunc chstate,
> + virDomainState new_state, int reason,
> + int event_type, int event_detail)
> +{
> + parallelsConnPtr privconn = domain->conn->privateData;
> + virDomainObjPtr privdom;
> + virDomainEventPtr event = NULL;
> + int state;
> + int ret = -1;
> +
> + parallelsDriverLock(privconn);
> + privdom = virDomainFindByUUID(&privconn->domains, domain->uuid);
> + parallelsDriverUnlock(privconn);
> +
> + if (privdom == NULL) {
> + parallelsDomNotFoundError(domain);
> + goto cleanup;
> + }
> +
> + state = virDomainObjGetState(privdom, NULL);
> + if (state != req_state) {
> + virReportError(VIR_ERR_INTERNAL_ERROR, _("domain '%s' not %s"),
> + privdom->def->name, req_state_name);
> + goto cleanup;
> + }
> +
> + if (chstate(privdom))
> + goto cleanup;
> +
> + virDomainObjSetState(privdom, new_state, reason);
> +
> + event = virDomainEventNewFromObj(privdom, event_type, event_detail);
> + ret = 0;
> +
> + cleanup:
> + if (privdom)
> + virDomainObjUnlock(privdom);
> +
> + if (event) {
> + parallelsDriverLock(privconn);
> + parallelsDomainEventQueue(privconn, event);
> + parallelsDriverUnlock(privconn);
> + }
> + return ret;
> +}
One comment I'd have here is that the event dispatch only works
within the context of this single virConnectPtr instance. If you
have 2 active connections to libvirt and one starts a guest,
the other connection won't see any event. Likewise if someone
starts/stops something using the parallels tools directly no
events will get queued.
Is there any way we can obtain some kind of notification from
the core parallels software stack ? Even if it is indirect eg
with UserModeLinux we detect stop/start events only, using an
inotify watch on the directory containing the UML monitor
socket :-)
> +
> +static int parallelsPause(virDomainObjPtr privdom)
> +{
> + return parallelsCmdRun(PRLCTL, "pause", PARALLELS_UUID(privdom), NULL);
> +}
> +
> +static int
> +parallelsPauseDomain(virDomainPtr domain)
> +{
> + return parallelsDomainChangeState(domain,
> + VIR_DOMAIN_RUNNING, "running",
> + parallelsPause,
> + VIR_DOMAIN_PAUSED, VIR_DOMAIN_PAUSED_USER,
> + VIR_DOMAIN_EVENT_SUSPENDED,
> + VIR_DOMAIN_EVENT_SUSPENDED_PAUSED);
> +}
> +
> +static int parallelsResume(virDomainObjPtr privdom)
> +{
> + return parallelsCmdRun(PRLCTL, "resume", PARALLELS_UUID(privdom), NULL);
> +}
> +
> +static int
> +parallelsResumeDomain(virDomainPtr domain)
> +{
> + return parallelsDomainChangeState(domain,
> + VIR_DOMAIN_PAUSED, "paused",
> + parallelsResume,
> + VIR_DOMAIN_RUNNING, VIR_DOMAIN_RUNNING_UNPAUSED,
> + VIR_DOMAIN_EVENT_RESUMED,
> + VIR_DOMAIN_EVENT_RESUMED_UNPAUSED);
> +}
> +
> +static int parallelsStart(virDomainObjPtr privdom)
> +{
> + return parallelsCmdRun(PRLCTL, "start", PARALLELS_UUID(privdom), NULL);
> +}
> +
> +static int
> +parallelsDomainCreate(virDomainPtr domain)
> +{
> + return parallelsDomainChangeState(domain,
> + VIR_DOMAIN_SHUTOFF, "stopped",
> + parallelsStart,
> + VIR_DOMAIN_RUNNING, VIR_DOMAIN_EVENT_STARTED_BOOTED,
> + VIR_DOMAIN_EVENT_STARTED,
> + VIR_DOMAIN_EVENT_STARTED_BOOTED);
> +}
> +
> +static int parallelsKill(virDomainObjPtr privdom)
> +{
> + return parallelsCmdRun(PRLCTL, "stop", PARALLELS_UUID(privdom), "--kill", NULL);
> +}
> +
> +static int
> +parallelsDestroyDomain(virDomainPtr domain)
> +{
> + return parallelsDomainChangeState(domain,
> + VIR_DOMAIN_RUNNING, "running",
> + parallelsKill,
> + VIR_DOMAIN_SHUTOFF, VIR_DOMAIN_SHUTOFF_DESTROYED,
> + VIR_DOMAIN_EVENT_STOPPED,
> + VIR_DOMAIN_EVENT_STOPPED_DESTROYED);
> +}
> +
> +static int parallelsStop(virDomainObjPtr privdom)
> +{
> + return parallelsCmdRun(PRLCTL, "stop", PARALLELS_UUID(privdom), NULL);
> +}
> +
> +static int
> +parallelsShutdownDomain(virDomainPtr domain)
> +{
> + return parallelsDomainChangeState(domain,
> + VIR_DOMAIN_RUNNING, "running",
> + parallelsStop,
> + VIR_DOMAIN_SHUTOFF, VIR_DOMAIN_SHUTOFF_SHUTDOWN,
> + VIR_DOMAIN_EVENT_STOPPED,
> + VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN);
> +}
> +
> static virDriver parallelsDriver = {
> .no = VIR_DRV_PARALLELS,
> .name = "Parallels",
> @@ -828,6 +966,11 @@ static virDriver parallelsDriver = {
> .domainGetXMLDesc = parallelsDomainGetXMLDesc, /* 0.10.0 */
> .domainIsPersistent = parallelsDomainIsPersistent, /* 0.10.0 */
> .domainGetAutostart = parallelsDomainGetAutostart, /* 0.10.0 */
> + .domainSuspend = parallelsPauseDomain, /* 0.10.0 */
> + .domainResume = parallelsResumeDomain, /* 0.10.0 */
> + .domainDestroy = parallelsDestroyDomain, /* 0.10.0 */
> + .domainShutdown = parallelsShutdownDomain, /* 0.10.0 */
> + .domainCreate = parallelsDomainCreate, /* 0.10.0 */
> };
>
I think I'd be happier if the creation /queueing of the virDomainEventPtr
parts where commented out, at least until we have dispatch of them
wired up, so the queue doesn't build up unbounded
Daniel
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