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qemu: Implement request of vCPU state using the guest agent

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This patch implements the VIR_DOMAIN_VCPU_AGENT flag for the
qemuDomainGetVcpusFlags() libvirt API implementation.
This commit is contained in:
Peter Krempa 2013-04-15 15:42:49 +02:00
parent 29c1e913e4
commit c6afcb052c
1 changed files with 56 additions and 4 deletions
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60
src/qemu/qemu_driver.c
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@ -4403,17 +4403,24 @@ static int
qemuDomainGetVcpusFlags(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
qemuDomainObjPrivatePtr priv;
virDomainObjPtr vm;
virDomainDefPtr def;
int ret = -1;
virCapsPtr caps = NULL;
qemuAgentCPUInfoPtr cpuinfo = NULL;
int ncpuinfo;
int i;
virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
VIR_DOMAIN_AFFECT_CONFIG |
VIR_DOMAIN_VCPU_MAXIMUM, -1);
VIR_DOMAIN_VCPU_MAXIMUM |
VIR_DOMAIN_VCPU_AGENT, -1);
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
return -1;
priv = vm->privateData;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
@ -4422,16 +4429,61 @@ qemuDomainGetVcpusFlags(virDomainPtr dom, unsigned int flags)
vm, &flags, &def) < 0)
goto cleanup;
if (flags & VIR_DOMAIN_AFFECT_LIVE) {
if (flags & VIR_DOMAIN_AFFECT_LIVE)
def = vm->def;
if (flags & VIR_DOMAIN_VCPU_AGENT) {
if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("vCPU count provided by the guest agent can only be "
" requested for live domains"));
goto cleanup;
}
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
goto cleanup;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
qemuDomainObjEnterAgent(vm);
ncpuinfo = qemuAgentGetVCPUs(priv->agent, &cpuinfo);
qemuDomainObjExitAgent(vm);
endjob:
if (qemuDomainObjEndJob(driver, vm) == 0)
vm = NULL;
if (ncpuinfo < 0)
goto cleanup;
if (flags & VIR_DOMAIN_VCPU_MAXIMUM) {
ret = ncpuinfo;
goto cleanup;
}
/* count the online vcpus */
ret = 0;
for (i = 0; i < ncpuinfo; i++) {
if (cpuinfo[i].online)
ret++;
}
} else {
if (flags & VIR_DOMAIN_VCPU_MAXIMUM)
ret = def->maxvcpus;
else
ret = def->vcpus;
}
ret = (flags & VIR_DOMAIN_VCPU_MAXIMUM) ? def->maxvcpus : def->vcpus;
cleanup:
if (vm)
virObjectUnlock(vm);
virObjectUnref(caps);
VIR_FREE(cpuinfo);
return ret;
}