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qemu: introduce qemuSetSchedulerParametersFlags

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Support for virDomainSetSchedulerParametersFlags of qemu driver.
This commit is contained in:
Hu Tao 2011-05-17 14:20:01 +08:00 committed by Eric Blake
parent 33645d44f9
commit a9189e2c41
1 changed files with 78 additions and 24 deletions
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102
src/qemu/qemu_driver.c
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@ -5038,22 +5038,23 @@ cleanup:
return ret;
}
static int qemuSetSchedulerParameters(virDomainPtr dom,
virSchedParameterPtr params,
int nparams)
static int qemuSetSchedulerParametersFlags(virDomainPtr dom,
virSchedParameterPtr params,
int nparams,
unsigned int flags)
{
struct qemud_driver *driver = dom->conn->privateData;
int i;
virCgroupPtr group = NULL;
virDomainObjPtr vm = NULL;
virDomainDefPtr persistentDef = NULL;
int ret = -1;
bool isActive;
virCheckFlags(VIR_DOMAIN_SCHEDPARAM_LIVE |
VIR_DOMAIN_SCHEDPARAM_CONFIG, -1);
qemuDriverLock(driver);
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPU)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
vm = virDomainFindByUUID(&driver->domains, dom->uuid);
@ -5063,16 +5064,39 @@ static int qemuSetSchedulerParameters(virDomainPtr dom,
goto cleanup;
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
isActive = virDomainObjIsActive(vm);
if (flags == VIR_DOMAIN_SCHEDPARAM_CURRENT) {
if (isActive)
flags = VIR_DOMAIN_SCHEDPARAM_LIVE;
else
flags = VIR_DOMAIN_SCHEDPARAM_CONFIG;
}
if ((flags & VIR_DOMAIN_MEM_CONFIG) && !vm->persistent) {
qemuReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("cannot change persistent config of a transient domain"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"), vm->def->name);
goto cleanup;
if (flags & VIR_DOMAIN_SCHEDPARAM_LIVE) {
if (!isActive) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
}
if (!qemuCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_CPU)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("cgroup CPU controller is not mounted"));
goto cleanup;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find cgroup for domain %s"),
vm->def->name);
goto cleanup;
}
}
for (i = 0; i < nparams; i++) {
@ -5086,20 +5110,39 @@ static int qemuSetSchedulerParameters(virDomainPtr dom,
goto cleanup;
}
rc = virCgroupSetCpuShares(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set cpu shares tunable"));
goto cleanup;
if (flags & VIR_DOMAIN_SCHEDPARAM_LIVE) {
rc = virCgroupSetCpuShares(group, params[i].value.ul);
if (rc != 0) {
virReportSystemError(-rc, "%s",
_("unable to set cpu shares tunable"));
goto cleanup;
}
vm->def->cputune.shares = params[i].value.ul;
}
vm->def->cputune.shares = params[i].value.ul;
if (flags & VIR_DOMAIN_SCHEDPARAM_CONFIG) {
persistentDef = virDomainObjGetPersistentDef(driver->caps, vm);
if (!persistentDef) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("can't get persistentDef"));
goto cleanup;
}
persistentDef->cputune.shares = params[i].value.ul;
rc = virDomainSaveConfig(driver->configDir, persistentDef);
if (rc) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("can't save config"));
goto cleanup;
}
}
} else {
qemuReportError(VIR_ERR_INVALID_ARG,
_("Invalid parameter `%s'"), param->field);
goto cleanup;
}
}
ret = 0;
cleanup:
@ -5110,6 +5153,16 @@ cleanup:
return ret;
}
static int qemuSetSchedulerParameters(virDomainPtr dom,
virSchedParameterPtr params,
int nparams)
{
return qemuSetSchedulerParametersFlags(dom,
params,
nparams,
VIR_DOMAIN_SCHEDPARAM_LIVE);
}
static int qemuGetSchedulerParameters(virDomainPtr dom,
virSchedParameterPtr params,
int *nparams)
@ -5143,9 +5196,8 @@ static int qemuGetSchedulerParameters(virDomainPtr dom,
}
if (!virDomainObjIsActive(vm)) {
qemuReportError(VIR_ERR_OPERATION_INVALID,
"%s", _("domain is not running"));
goto cleanup;
val = vm->def->cputune.shares;
goto out;
}
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
@ -5160,6 +5212,7 @@ static int qemuGetSchedulerParameters(virDomainPtr dom,
_("unable to get cpu shares tunable"));
goto cleanup;
}
out:
params[0].value.ul = val;
params[0].type = VIR_DOMAIN_SCHED_FIELD_ULLONG;
if (virStrcpyStatic(params[0].field, "cpu_shares") == NULL) {
@ -7675,6 +7728,7 @@ static virDriver qemuDriver = {
.domainMigratePerform3 = qemuDomainMigratePerform3, /* 0.9.2 */
.domainMigrateFinish3 = qemuDomainMigrateFinish3, /* 0.9.2 */
.domainMigrateConfirm3 = qemuDomainMigrateConfirm3, /* 0.9.2 */
.domainSetSchedulerParametersFlags = qemuSetSchedulerParametersFlags, /* 0.9.2 */
};